Research Article |
Corresponding author: Michael S. Engel ( msengel@ku.edu ) Academic editor: Aaron Smith
© 2019 Michael S. Engel, Zachary H. Falin, Jan Batelka.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Engel MS, Falin ZH, Batelka J (2019) A new genus of Pelecotominae from Mexico, with notes on the genera Clinops and Scotoscopus and the description of new species (Coleoptera, Ripiphoridae). ZooKeys 857: 59-84. https://doi.org/10.3897/zookeys.857.34938
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Taxonomic notes are provided on species of the uncommonly encountered ripiphorid subfamily Pelecotominae. Zapotecotoma sumichrasti gen. et sp. nov., is described from southern Mexico based on a unique male likely collected in the later part of the mid-19th Century. The discovery of additional species of the South African genus Clinops Gerstaecker permit a revised diagnosis and distinction of the group from the eastern Mediterranean genus Scotoscopus Brenske and Reitter, resurrected status. Two new species of Clinops are established: Clinops inexpectatus sp. nov. (northeast of Durban near Swaziland) and C. perpessus sp. nov. (region of Durban), and Scotoscopus spectabilis (Schaufuss) is newly recorded for the Peloponnese in Greece.
distribution, Greece, Mexico, South Africa, taxonomy, Tenebrionoidea
The ripiphorid subfamily Pelecotominae is one of the earliest diverging lineages of wedge-shaped beetles, only the Ptilophorinae being more basal in the phylogeny of Ripiphoridae (
The subfamily has been generally characterized by
Herein we provide various notes on Pelecotominae. First, we describe a new genus and species from southern Mexico, thereby allowing us to update the tabulation of known diversity within the subfamily (Table
Currently recognized genera of Pelecotominae (sensu
Genus | No. Species | Spur Formula | Distribution |
Allocinops Broun, 1921 | 1 | 1-2-2 | New Zealand |
Ancholaemus Gerstaecker, 1855a | 2 | 0-1-2 | Brazil, Ecuador (Galapagos Islands) |
†Burmitoma Batelka, Engel, & Prokop, 2018 | 1 | 0-2-2 | Myanmar (Cenomanian) |
Clinopalpus Batelka, 2009 | 1 | 0-0-1 | mainland Malaysia |
Clinops Gerstaecker, 1855a | 3 | 0-0-2 | South Africa |
†Flabellotoma Batelka, Prokop, & Engel, 2016b | 1 | 0-0-0 | Myanmar (Cenomanian) |
Micholaemus Viana, 1971 | 1 | 0-1-2 | Argentina |
Pelecotoma Fischer von Waldheim, 1809 | 3 | 1-1-1 | eastern North America, central Europe, Japan |
†Plesiotoma Batelka, Engel, & Prokop, 2018 | 1 | 1-2-2 | Myanmar (Cenomanian) |
Rhipistena Sharp, 1878 | 3 | 2-2-2 | New Zealand |
Scotoscopus Brenske & Reitter, 1884 | 1 | 0-2-2 | Greece, Turkey |
Sharpides Kirkaldy, 1910 | 1 | 2-2-2 | New Zealand |
†Spinotoma Hsiao & Huang, 2018 | 1 | ? | Myanmar (Cenomanian) |
Zapotecotoma gen. nov. | 1 | 0-1-1 | southern Mexico |
Morphological terminology and the format for descriptions generally follow that used elsewhere for Pelecotominae (e.g.,
Zapotecotoma sumichrasti sp. nov.
♂: Body slender; head with postocular genae expanded into lobes; compound eye not expanded beyond mandibular base and with a small extra-antennal sclerotous emargination; antenna with eleven antennomeres; antennomeres I–III simple, IV–X with inner-facing, flabellate, compressed rami, XI similar in shape to preceding rami; ultimate maxillary palpomere cylindrical, not compressed or expanded; distal sensory duct on ultimate maxillary palpomere a small, ovoid point. Lateral aspect of pronotum with a ventrally bowed sulcus; pronotal disc without longitudinal medial impression; mesosternum convex but without distinct medial keel; metepisternum with elytron-receiving carina extending along anterior portion only; posterior aspect of metepimeron narrow. Metacoxa with strongly developed posterior flange; ventral surface of pro- and mesofemora in males without densely setose patch; tibial spur formula 0-1-1; pretarsal claws bifid.
♀: Unknown.
The new genus-group name is a combination of Zapotec, the principal indigenous people in the region of the type locality, and –toma (derived from the Greek, tome or tomeus, meaning, “separation”, “cutting”, or “cutter”), a suffix generally used in the generic names of pelecotomines. The gender of the name is feminine.
Pelecotominae
new genus 1 gen. nov.:
As for the genus (vide supra).
♂: General size and appearance typical of Pelecotominae. Size 7.38 mm from tip of abdomen to base of antennae, 2.15 mm wide at base of pronotum. Body bicolorous; head, prothorax, mesoscutellum, and majority of elytra orange testaceous; remainder of body dull, dark reddish brown, including patches at apexes of elytra (Figs
Head ovoid, approximately 1.1× longer than wide in facial view, medial length 1.67 mm, maximum width (across compound eyes) 1.54 mm. Vertex convex dorsally and posteriorly, as wide as lower face (below compound eyes), rising high above compound eyes in facial view, sloping uniformly to meet and slightly overlap pronotal anterior margin (Fig.
Antenna consisting of eleven antennomeres; antennomere I longer than wide, slightly curved to approximate compound eye; antennomere II short, slightly wider than long; antennomere III longer than antennomere II, about as long as apically wide, triangular, apical margin oblique so as to receive base of following antennomere. Antennomeres IV–XI greatly dissimilar from preceding antennomeres; antennomeres IV–X with internally facing, compressed rami; bases of antennomeres IV–X short and of similar lengths; rami IX and X elongate, extending to apex of antennomere XI (apexes of rami IV–VIII damaged and missing and left antenna completely missing so precise structure of all rami uncertain). Antennomere XI expanded, similar in shape to rami of preceding antennomeres. Total length of antennomere XI nearly 1.6× length of bases of antennomeres IV–X combined.
Pronotum with suberect to semi-decumbent, fine, orange setae, integument dull, and weakly, indistinctly, and contiguously punctate, with punctures more indistinct posteriorly and integument becoming imbricate. Pronotum triangular in shape, narrowed anteriorly; anterior margin broadly rounded; posterior margin sinuate and generally trilobed, with medial lobe as broad as mesoscutellum and narrowly emarginate, acutely rounded on either side of emargination; lateral margins generally straight, converging apically, convex ventrally to propleurae; propleuron well developed. Pronotal disc without mediolongitudinal carina or impression but with a weak transverse impression near apex and a pair of weak oblique impressions on either side of midline near base; lateral aspect with a ventrally bowed sulcus. Mesonotum obscured by elytra. Mesoscutellum short, flat, parallel-sided, with broadly rounded apex; integumental sculpturing and setation as on pronotal disc. Metanotum obscured by elytra.
Lateral and ventral aspects of pterothorax typical of subfamily. Mesepisternum weakly imbricate, fused with mesosternum, with scattered semi-decumbent setae. Mesepimeron forming prominent, rectangular sclerite separated from mesepisternum by deep sulcus; sculptured and setation as on mesepisternum. Metepisternum an elongate, narrow rectangular sclerite, with sculpturing and setation as on mesepisternum; metasternum massive, weakly imbricate and with semi-decumbent setae more numerous than on metepisternum. Metepimeron approximately parallel-sided except apically upper margin arching ventrally, extending anteriorly to wing base as narrow (slightly more narrow than metepisternum), sclerotized band; weakly imbricate with scattered fine setae.
Legs typical for subfamily; coxae, trochanters, and femora weakly, irregularly, almost indistinctly punctate on otherwise smooth and shining integument with semi-decumbent to suberect lightly fuscous setae; metacoxa with strongly developed posterior flange; femora without densely setose patches ventrally; tibiae straight, cylindrical, broadened slightly apically, with apex terminated by dense row of regular, thin, spiniform setae; tibial spur formula 0-1-1. Tarsi 5-5-4, all tarsomeres cylindrical, slightly tapered basally, truncate apically, progressively reducing in diameter; integument and setae similar to tibiae; protarsus longer than protibia. Protarsomere I slightly shorter than combined length of protarsomeres II and III, protarsomere IV slightly shorter than protarsomere V; relative ratios of mesotarsomeres similar except mesotarsomere I subequal to combined length of mesotarsomeres II and III; ratios of metatarsomeres similar. Pretarsal claws bifid, apical ramus sickle-shaped, inner ramus broadly rounded apically.
Elytra elongate, completely covering abdomen, surface imbricate; elytron basal width 1.08 mm, length 6.83 mm; each elytron with four indistinct costae; lateral margins parallel-sided, lateral margin comparatively straight until tapering inward in apical third, medial margin nearly straight until rounding at apex (Fig.
Abdomen weakly imbricate, with scattered semi-decumbent to semi-erect setae.
♀: Latet.
♂, [Mexico:] F. Sumichrast [Francis E. Sumichrast (1828–1882), a famous Mexican collector who supplied biological specimens to many researchers and institutions during the 19th Century] / Isth. [Isthmus] of Tehuantepec // F.C. Bowditch / coll. [Frederick Channing Bowditch (1854–1925) Collection, a wealthy amateur collector of Coleoptera] (
The specific epithet honors Francis E. Sumichrast (1828–1882), collector of the holotype and many other fascinating species from southern Mexico during the mid-19th Century.
Clinops Gerstaecker, 1855a: 16. Type species: Clinops badius Gerstaecker, 1855, by monotypy.
Body slender; elytra 3.0–3.4× as long as pronotal disc; coloration light to dark brown, with fine, short golden to light or dark brown setae; head with postocular genae expanded into lobes; compound eye not expanded beyond mandibular base and with a small extra-antennal sclerotous emargination; antenna with eleven antennomeres; male antenna with antennomeres I–III simple, IV–X with inner-facing, flabellate, compressed rami, XI similar in shape to preceding rami; female antenna similar to male with much shorter, pectinate, compressed rami; ultimate maxillary palpomere trapezoidal, apical width slightly less than maximum length, with blunt, truncate apex, not grossly enlarged; distal sensory duct on ultimate maxillary palpomere elongate, strongly oblique. Lateral aspect of pronotum with a ventrally bowed sulcus; pronotal disc without longitudinal medial impression; mesosternum weakly convex, without medial keel; metepisternum without elytron-receiving carina; posterior aspect of metepimeron slightly expanded. Metacoxa with strongly developed posterior flange; ventral surface of pro- and mesofemora in males without densely setose patch; tibial spur formula 0-0-2; pretarsal claws apically bifid, with or without a small, peg-like subsidiary tooth at midlength. Male genitalia with parameres weakly curved with apices widely separated from each other.
The identity of Clinops has presented quite a historical challenge.
There is a possibility that the differences observed between C. inexpectatus and C. perpessus are only sex differences rather than species distinctions. There are sexual dimorphisms known among pelecotomines, such as differences in the ultimate maxillary palpomeres of Ancholaemus Gerstaecker or color of the pronotal disc in Scotoscopus. Nonetheless, we believe the differences in head and pronotal shape reflect features specific to species, particularly as these are not known to be sexually variable in any other pelecotomines. Accordingly, we believe that the material described here represents distinct taxa. Naturally, the discovery of further material from a variety of localities will allow for further testing of this hypothesis.
It is interesting to note that while the form of the pretarsal claws has historically been used as a distinguishing feature for many genera, such as the conditions of bifid or pectinate, and in many cases such a difference does concord with other attributes, there is variation within Clinops. Among the species included here are those with strictly bifid claws, i.e., with a subapical ramus (tooth) that opposes the apical terminus of the claw, as well as one (C. inexpectatus) that has the typical bifid form coupled with the presence of a smaller, subsidiary tooth at about midlength (Fig.
The genus is presently recorded only from South Africa. The precise locality from which Gerstaecker’s holotype of C. badius was collected is not known.
Pelecotominae
new genus 2 gen. nov.:
Differs from C. inexpectatus by the only slightly elevated vertex above the pronotum (greatly elevated in C. inexpectatus: cf. Figs
♂: General size and appearance typical of Pelecotominae. Size 9.75 mm from tip of abdomen to base of antennae, 2.54 mm wide at base of pronotum. Body largely dark brown, slightly lighter reddish brown on lateral thirds of pronotum, basal two thirds of elytra, and apical abdominal sterna (Figs
Head ovoid, approximately 1.02× longer than wide in facial view, medial length 1.67 mm, maximum width (across compound eyes) 1.63 mm. Vertex convex dorsally and posteriorly, as wide as lower face (below compound eyes), rising high above compound eyes in facial view, sloping uniformly to meet and slightly overlap pronotal anterior margin, with weak medially impressed line, disappearing posteriorly. Dorsal, lateral, and facial aspects of head with fine, decumbent, golden to fuscous setae, particularly numerous on face between compound eyes and vertex, abundant on genae; integument dull, with minute, nearly contiguous punctures separated by apparently smooth to imbricate integument. Compound eye of moderate size, encompassing much of medial third of lateral surface of head, finely faceted, emarginate in upper third (emargination deeper than in Z. sumichrasti, such that compound eye nearly appears bisected in facial view: cf. Figs
Antenna consisting of eleven antennomeres; antennomere I longer than wide, slightly curved to approximate curvature of compound eye; antennomere II short, slightly wider than long; antennomere III longer than antennomere II, length approximately 1.3× apical width, apical margin truncate. Antennomeres IV–XI greatly dissimilar from preceding antennomeres; antennomeres IV–X with internally facing, compressed rami; bases of antennomeres IV–X short and of similar lengths; rami IX and X elongate, extending to apex of antennomere XI; remaining rami progressively shorter from X to IV. Antennomere XI expanded, similar in shape to rami of preceding antennomeres. Total length of antennomere XI approximately 2× length of bases of antennomeres IV–X combined.
Pronotum with semi-decumbent to decumbent, fine, golden setae except in medial third such setae fuscous, integument dull, and weakly and contiguously punctate, with punctures more indistinct anteriorly and posteriorly, integument becoming imbricate. Pronotum triangular in shape, narrowed anteriorly; anterior margin broadly rounded; posterior margin sinuate and generally trilobed, with medial lobe scarcely broader than mesoscutellum and rounded (not emarginate: distinctly emarginate in C. inexpectatus, vide infra); lateral margins generally straight, converging anteriorly, convex ventrally to propleurae; propleuron well developed. Pronotal disc wider at base than length, without mediolongitudinal carina or impression; lateral aspect with a ventrally bowed sulcus. Mesonotum obscured by elytra. Mesoscutellum (mesoscutellar shield) short, flat, parallel-sided, with broadly rounded apex; integumental sculpturing and setation as on pronotal disc. Metanotum obscured by elytra.
Lateral and ventral aspects of pterothorax typical of subfamily. Mesepisternum weakly and faintly imbricate, with scattered minute punctures, fused with mesosternum, with scattered decumbent setae. Mesepimeron forming prominent, rectangular sclerite separated from mesepisternum by deep sulcus; sculptured and setation as on mesepisternum. Metepisternum an elongate, narrow rectangular sclerite, with sculpturing and setation as on mesepisternum; metasternum massive, weakly imbricate and with decumbent setae more numerous than on metepisternum. Metepimeron slightly expanded posteriorly, extending anteriorly to wing base as narrow (slightly more narrow than metepisternum), sclerotized band; weakly imbricate with scattered setae.
Legs typical for subfamily; coxae, trochanters, and femora weakly, irregularly, almost indistinctly punctate on otherwise smooth integument with decumbent, golden to lightly fuscous setae; metacoxa with strongly developed posterior flange; femora without densely setose patches ventrally; tibiae straight, cylindrical, broadened slightly apically, with apex terminated by dense row of regular, thin, spiniform setae; tibial spur formula 0-0-? (hind legs missing in holotype). Tarsi 5-5-[4, metatarsus presumed to have had four tarsomeres], all tarsomeres cylindrical, very slightly tapered basally, truncate apically; integument and setae similar to tibiae; protarsus longer than protibia. Protarsomere I subequal to combined length of protarsomeres II and III, protarsomere IV less than one-half length protarsomere V; relative ratios of basal mesotarsomeres similar (apical tarsomeres of meso- and metatarsi missing in holotype). Pretarsal claws bifid, apical and inner rami both sickle-shaped and acutely pointed, without any midlength or subsidiary teeth.
Elytra elongate, completely covering abdomen, surface imbricate with minute, weak, nearly contiguous punctures; elytron basal width 1.27 mm, length 8.21 mm; each elytron with four indistinct costae; lateral margins parallel-sided, lateral margin comparatively straight until tapering inward in apical fifth, medial margin nearly straight until rounding at apex; apex weakly acuminate.
Abdomen with terga weakly and faintly imbricate; sterna imbricate with scattered minute punctures, with scattered decumbent, fine setae; male terminalia as depicted in figures 8–14.
♀: Latet.
♂, [South Africa: KwaZulu-Natal: eThekwini:] Port / Natal / 49 29 [on underside of label] [no collector or date] (
The specific epithet is taken from the Latin, meaning “suffer with patience” or “endure”, and is a reference to the vast time over which this species has awaited description.
“Clinops badius Gerstaecker”:
Refer to diagnosis of C. perpessus (vide supra).
♀: General size and appearance typical of Pelecotominae. Size 10.02 mm from tip of elytra to mandibles, 2.14 mm wide at base of pronotum. Body largely dark brown, slightly lighter reddish brown on humeral parts of elytra, and apical abdominal sterna (Figs
Head hexagonal from facial view, approximately 1.25× longer than wide in facial view, medial length 1.80 mm, maximum width (across compound eyes) 1.08 mm. Vertex convex dorsally and posteriorly, as wide as lower face (below compound eyes), rising high above compound eyes in facial view, sloping uniformly to meet and distinctly overlap pronotal anterior margin. Dorsal, lateral, and facial aspects of head with fine, sparse, golden setae, particularly numerous on face between compound eyes, abundant on genae; integument dull, with deep, nearly contiguous punctures separated by smooth integument. Compound eye of moderate size, length 0.84 mm, width 0.29 mm, encompassing much of medial third of lateral surface of head, finely faceted, emarginate in upper third. Postocular gena expanded into lobe. Frons broad, with antennal torulus laterally directed, antennal toruli separated by distance equal to length of scape, compound eyes separated by distance slightly less than maximum compound eye length. Malar space elongate, more than one-half length of scape, slightly less than basal mandibular width. Mandible short, slightly curved, with short, acute subapical tooth. Maxillary palpus long, tetramerous, apical palpomere largest, trapezoidal, its apical width slightly less than maximum length, with blunt, truncate apex, distal sensory duct elongate, strongly oblique.
Only left antenna without apical antennomere preserved, antenna consisting probably of eleven (10 preserved) antennomeres; antennomere I longer than wide, slightly curved to approximate curvature of compound eye; antennomere II short, distinctly longer than wide, much narrowed in basal third; antennomere III longer and wider than antennomere II, length approximately 1.5× apical width, apical margin as in antennomere II; antennomeres IV–X greatly dissimilar from preceding antennomeres, with internally facing, compressed rami truncated apically, bases short and of similar lengths; rami elongate, about 2.0× as long as their respective base.
Pronotum with fine, golden setae except in medial third such setae fuscous, integument dull, and weakly and contiguously punctate, with punctures more indistinct anteriorly and posteriorly, integument becoming imbricate. Pronotum triangular in shape, narrowed anteriorly, median length 2.30 mm; anterior margin broadly rounded; posterior margin sinuate and generally trilobed, with medial lobe broader than mesoscutellum and distinctly emarginate (rounded in C. perpessus); lateral margins generally straight, converging anteriorly, convex ventrally to propleurae; propleuron well developed. Pronotal disc as wide as long, with mediolongitudinal shallow impression in basal third; lateral aspect with a ventrally bowed sulcus. Mesonotum obscured by elytra. Mesoscutellum short, mesoscutellar shield with deep medial furrow, parallel-sided, with broadly rounded apex; integumental sculpturing and setation as on pronotal disc. Metanotum obscured by elytra.
Lateral and ventral aspects of pterothorax typical of subfamily. Mesepisternum weakly and faintly imbricate, with scattered minute punctures, fused with mesosternum, with scattered decumbent setae. Mesepimeron forming prominent, rectangular sclerite separated from mesepisternum by deep sulcus; sculptured and setation as on mesepisternum. Metepisternum an elongate, narrow rectangular sclerite, with sculpturing and setation as on mesepisternum; metasternum massive, weakly imbricate and with decumbent setae more numerous than on metepisternum. Metepimeron slightly expanded posteriorly, extending anteriorly to wing base as narrow (slightly more narrow than metepisternum), sclerotized band; weakly imbricate with scattered setae.
Legs typical for subfamily (left front and mid-leg incomplete); coxae, trochanters, and femora weakly, irregularly, almost indistinctly punctate on otherwise smooth integument with decumbent, golden setae; metacoxa with strongly developed posterior flange; femora without densely setose patches ventrally; tibiae straight, cylindrical, broadened slightly apically, with apex terminated by dense row of regular, thin, spiniform setae; tibial spur formula 0-0-2, metatibial spurs well visible. Tarsal formula 5-5-4, all tarsomeres cylindrical, very slightly tapered basally, truncate apically; integument and setae similar to tibiae; protarsus longer than protibia. Protarsomere I subequal to combined length of protarsomeres II and III, protarsomere IV less than one-half length protarsomere V; relative ratios of basal mesotarsomeres similar. Pretarsal claws with apical and inner teeth both sickle-shaped and acutely pointed, with small, peg-like subsidiary tooth at midlength (Fig.
Elytra elongate, completely covering abdomen, surface shining with minute, weak, nearly contiguous punctures; elytron basal width 1.15 mm, length 6.10 mm; without costae; lateral margins parallel-sided, lateral margin comparatively straight until tapering inward in apical fifth, medial margin nearly straight until rounding at apex; apex weakly acuminate.
Abdomen with terga weakly and faintly imbricate; sterna imbricate with scattered minute punctures, with scattered decumbent, fine setae, ovipositor shallowly protruded.
♂: Unknown.
♀, S[outh]. Afr[ica].: Zululand / Hluhluwe Game Res. / 28.05. S -32.04 E // 20.11.1992 [20 November 1992]; E.-Y: 2839 / fruittraps, woodysav [?] / leg. Endrödy - Younga // Clinops / badius / Gerstaecker 1855 / Det. ZH Falin [20]’09”.
The specific epithet is taken from Latin, meaning “unexpected”, and refers to the surprise that it was undescribed upon re-examination by JB.
Note. Although the identification label is dated 2009, the specimen was earlier identified and used by ZHF as C. badius in
Scotoscopus Brenske & Reitter, 1884: 92. Type species: Scotoscopus carbonarius Reitter in Brenske & Reitter, 1884 (= Clinops spectabilis Schaufuss, 1872), by monotypy.
Body slender; elytra 4.0–4.8× as long as pronotal disc, coloration of head, elytra, meso- and metathorax and abdomen dark brown or black, pronotum bright red in males and dark-red with black markings, setae dark, sparsely distributed and indistinct; head with postocular genae expanded into lobes; compound eye not expanded beyond mandibular base and with a small extra-antennal sclerotous emargination; antenna with eleven antennomeres; male antenna with antennomeres I–III simple, III compressed, almost lenticular, IV–X with inner-facing, flabellate, compressed rami, XI similar in shape to preceding rami; female antenna similar to male, antennomere III long and cylindrical, rami much shorter, pectinate, compressed; ultimate maxillary palpomere cylindrical, apical width 3× less than maximum length, with blunt, truncate apex, not grossly enlarged; distal sensory duct on ultimate maxillary palpomere elongate, strongly oblique. Lateral aspect of pronotum with a ventrally bowed sulcus; pronotal disc without longitudinal medial impression; mesosternum weakly convex, without medial keel; metepisternum without elytron-receiving carina; posterior aspect of metepimeron slightly expanded. Metacoxa with strongly developed posterior flange; ventral surface of pro- and mesofemora in males without densely setose patch; tibial spur formula 0-2-2; pretarsal claws bifid, with blunt, small subsidiary tooth proximal to inner bifid ramus (Fig.
Clinops spectabilis Schaufuss, 1872: 276.
Scotoscopus carbonarius
Reitter in Brenske & Reitter, 1884: 93. Synonymy vide
As for the genus (vide supra).
1♂, Greece: Pelopónnisos / Taïyetos Mts., 950 – / 1800 m, 15.–19.v.1990 [15–19 May 1990] / Zool. Mus. Copenh. Exp. [p] // Scotoscopus / carbonarius Rtt. / det. C. Wurst 99 [handwritten] (
Hitherto, the species was known from the holotypes of the two synonymous taxa collected in Turkey (Antakya) and Mount Parnassus (central Greece) and subsequently from approximately a dozen specimens from Crete (Cretan Archipelago, Greece) (
The study of Pelecotominae, like any rare group of organisms, is hampered by a dearth of information and available material. Several groups are known only from historical type material, one sex, and from little more than type localities. Beyond this, the biology, ecology, and immature stages of most species remains utterly unknown and modeling of ecological niches is presently impossible without a greater variety of collecting localities across diverse habitats. The closest one might come to having sufficient material upon which to base ecological models or explore intraspecific variation would be some of the South American species, such as Ancholaemus lyciformis Gerstaecker, where comparatively larger series of specimens are known from a broad range of localities. Otherwise, with such meagre material at hand for Pelecotominae, further exploration and surveys are desperately needed in order to significantly advance our knowledge of this lineage. In the interim, the systematics of the subfamily is improving by slow iterations, to which the present study is but one small step.
Among the many present challenges toward a systematization of the Pelecotominae is the clarification of traits for many species and genera, and whether or not these features are of broader phylogenetic significance. For example, the tibial spur formula has been used to distinguish genera across the subfamily. As shown herein by the revised diagnosis of Clinops, this feature alone has been difficult to interpret. For example, in many taxa the mesotibial spurs are exceedingly small and easily overlooked (particularly if certain specimen preparations obscure a direct view of the inner apical mesotibial articulation), or in older specimens may be damaged and missing, and thereby understandably miscoded as absent, ultimately leading to confusion in the placement of certain specimens and species. More critically, a comprehensive phylogeny of the subfamily is lacking and presently not possible and it therefore remains speculative as to whether this feature (or any of the traits used to recognize genera in the subfamily) will be shown to support clades at any rank, or whether they will prove to be rampantly homoplastic at anything above the level of species. Indeed, once a phylogeny is resolved for the subfamily, it could be discovered that placing an emphasis on tibial spur formula in the circumscription of genera is misguided and does not actually characterize natural groups. Furthermore, the forms of the maxillary palpi and pretarsal claws are more quantitative than qualitative and so likewise require testing in a cladistic framework. This is not to say that the tibial spur formula, pretarsal claw structure, or maxillary palpus form will not ultimately prove to be consistent in a phylogenetic framework and support clades traditionally recognized as genera, merely that in the absence of such a resolved topology their validity is equivocal. Moreover, additional character systems such as the male genitalia remain to be explored comparatively. This is understandable as males are not known for all taxa, but nonetheless represent one of any number of potentially valuable sources of characters. The male genitalia of Pelecotominae are not often figured and, where known, there is comparatively little variation in overall form (e.g.,
We are grateful to Martin Fikaček (National Museum, Praha) for information and photographs of the specimen of Clinops in