Research Article |
Corresponding author: Radim Gabriš ( gabris.radim@gmail.com ) Academic editor: Yves Bousquet
© 2016 Radim Gabriš, Robin Kundrata, Filip Trnka.
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:
Gabriš R, Kundrata R, Trnka F (2016) Review of Dolichostyrax Aurivillius (Cerambycidae, Lamiinae) in Borneo, with descriptions of three new genera and the first case of (ovo)viviparity in the long-horned beetles. ZooKeys 587: 49-75. https://doi.org/10.3897/zookeys.587.7961
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We reviewed the species of genus Dolichostyrax Aurivillius (Cerambycidae: Morimopsini) from Borneo, which included the redescriptions of two species – D. moultoni Aurivillius, 1911 and D. longipes Aurivillius, 1913, with the first female description for the latter. After the examination of the additional material previously identified as Dolichostyrax, we described three new genera – Borneostyrax gen. n., Microdolichostyrax gen. n., and Eurystyrax gen. n. Borneostyrax cristatus sp. n. was described based on the male and female specimens, whilst Microdolichostyrax hefferni sp. n., M. minutus sp. n. and Eurystyrax nemethi sp. n. are known only from females. All studied species are distributed in the mountain regions of Sabah, with the exception of D. moultoni from Sarawak. An identification key to the genera of Bornean Morimopsini and species of Dolichostyrax, Borneostyrax gen. n., Microdolichostyrax gen. n. and Eurystyrax gen. n. is provided and their distributions and intraspecific morphological variability are discussed. The short and wide ovipositor, loss of spermatheca, and presence of large larvae without apparent eggbursters inside the female abdomens indicate the presence of (ovo)viviparity in Borneostyrax gen. n. This is the first case of this rare phenomenon within Cerambycidae.
Coleoptera , diversity, endemism, hot-spots, Malaysia, Morimopsini
Long-horned beetles (Cerambycidae) with about 35,000 described species are the fifth largest beetle family in the world (
Herein, we review the Dolichostyrax species in Borneo, which includes the redescriptions of D. moultoni Aurivillius, 1911 and D. longipes Aurivillius, 1913 and the descriptions of three new genera closely related to Dolichostyrax. For the first time, male and female genitalia are investigated and the identification key is provided for the Bornean Morimopsini.
The study is based on adult semaphoronts of both sexes. Before the investigation of the external morphological characters, specimens were cleaned from a crust of dirt in a sonicator, following the method of
PCDH personal collection of Daniel J. Heffern, Houston, TX, USA
PCJC personal collection of Jim Cope, San Jose, CA, USA
PCLB personal collection of Larry G. Bezark, Sacramento, CA, USA
Dolichostyrax Aurivillius, 1911: 194.
Dolychostyrax Breuning, 1950: 162 (incorrect subsequent spelling).
Dolichostyrax moultoni Aurivillius, 1911.
Dolichostyrax differs from Microdolichostyrax gen. n. and Eurystyrax gen. n. by longer antennae (0.9–1.3 times as long as BL vs. 0.6–0.7, respectively), antennomere XI shorter than III (Figs
Dolichostyrax moultoni Aurivillius, holotype male: 1 Dorsal habitus 2 Lateral habitus 3 Ventral habitus 4 Head, frontal view 5 Antenna 6 Mandible apex 7 Apical maxillary palpomeres 8 Apex of protibia with protarsus 9 Penis, ventral view 10 Penis, lateral view 11 Tegmen, ventral view 12 Tegmen, lateral view. Not to scale.
13–20 Dolichostyrax longipes Aurivillius, holotype male: 13 Dorsal habitus 14 Lateral habitus 15 Head, frontal view 16 Antenna 17 Penis, ventral view 18 Penis, lateral view 19 Tegmen, ventral view 20 Tegmen, lateral view 21–26 Dolichostyrax longipes Aurivillius, female: 21 Dorsal habitus 22 Lateral habitus 23 Head, frontal view 24 Antenna 25 Reproductive system 26 Spermatheca. Not to scale.
27–33 Microdolichostyrax hefferni sp. n., holotype female: 27 Dorsal habitus 28 Lateral habitus 29 Ventral habitus 30 Head,frontal view 31 Antenna 32 Reproductive system 33 Spermatheca 34–39 Microdolichostyrax minutus sp. n., holotype female: 34 Dorsal habitus 35 Lateral habitus 36 Head, frontal view 37 Antenna 38 Reproductive system 39 Spermatheca. Not to scale.
47–58 Borneostyrax cristatus sp. n., holotype male: 47 Dorsal habitus 48 Lateral habitus 49 Ventral habitus 50 Head, frontal view 51 Antenna 52 Mandible apex 53 Apical maxillary palpomeres 54 Apex of protibia with protarsus 55 Penis, ventral view 56 Penis, lateral view 57 Tegmen, ventral view 58 Tegmen, lateral view 59–63 Borneostyrax cristatus sp. n., paratype female: 59 Dorsal habitus 60 Lateral habitus 61 Head, frontal view 62 Antenna 63 Reproductive system. Not to scale.
Body elongate to broadly oval, 9.4–11.8 mm long and 3.5–4.3 mm wide in males, and 11.1–12.5 mm long and 4.3–4.9 mm wide in females. Body coloration brown to black; antennae, palpi and legs (or only appendage joints) lighter (Figs
Prothorax sub-cylindrical, 0.9–1.1 times as long as wide, widest slightly before middle, then gradually narrowed towards posterior margin, laterally with one small more or less distinct tubercle; pronotal disc weakly convex, sparsely covered with deep puncturation, with more or less distinct, smooth or punctured tubercles (Figs
Abdomen with five ventrites (Fig.
Malaysia: Borneo (Sarawak: D. moultoni Aurivillius, 1911; Sabah: D. longipes Aurivillius, 1913), Indonesia (Sumatra: D. basispinosus Breuning & de Jong, 1941; Java: D. tuberculatus Fisher, 1936; D. cylindricus Breuning, 1939).
Dolichostyrax moultoni Aurivillius, 1911: 195.
Holotype, male, “Klinkang / 1-01 // Type //
This species differs from Dolichostyrax longipes by apex of scape without a distinct bulge (Figs
(male). Body length 11.2 mm, body width 3.9 mm. Body brown; appendage joints and palpi lighter. Body densely clothed with very short golden brown pubescence, incorporating fine detritus particles. Head slightly narrower than anterior margin of pronotum. Antennae as long as body; scape gradually widened towards apex, thickest at apical part, covered with very short dense light brown pubescence; the relative ratio of antennomere lengths 2.0 : 0.2 : 1.0 : 0.8 : 0.6 : 0.4 : 0.4 : 0.4 : 0.4 : 0.5 : 0.8.
Prothorax 1.1 times as long as wide, laterally with one small obtuse tubercle; pronotal disc with a pair of distinct tubercles near middle and one median at second half; pronotal tubercles not punctured. Prosternum in front of coxae 0.7 times shorter than diameter of coxal cavity. Scutellum transverse, about four times as wide as long. Elytra elongate, 1.6 times as long as wide at widest part, 1.9 times as long as pronotum, widest before middle; each elytron with three rows of tubercles irregular in shape and size (Figs
Male genitalia with tegmen elongate, widest before middle, basally without distinct strut; parameres elongate, less than half of phallobase length, apically with sparse long setae (Figs
Female unknown.
Malaysia: Borneo (Sarawak: “Klinkang”). There is “Klinkang” written on the original label, but “Kuching” in the original description (
Dolichostyrax longipes Aurivillius, 1913: 239.
Holotype, male, “Batu Lawi / Expedition / Between ulu / Madihil and Lim- / bang, 5-1911 / Gazette Aug. / 1911 //
Male, “Malaysia, Sabah / Crocker Range / I-12-2004 / Jackson coll // Dolichostyrax / n. sp. 1 / det. J. Sudre 06 // Dolichostyrax / longipes Aurivillius, 1913 / Gabriš det., 2016” (PCDH); male, “BORNEO, Sabah, Malaysia / Kinabalu Park, HQ / 31.1.–2.2.2000, 1500 m / lgt. Jan Cempírek // Dolichostyrax / longipes Aurivillius, 1913 / Gabriš det., 2016” (PCJC); female, “Malaysia, Sabah / Sipitang vic / II-26-2005 / local coll // Dolichostyrax / longipes Aurivillius, 1913 / Gabriš det., 2016” (PCDH); female, “Malaysia, Sabah / Ranau / II-12-2004 / Lubin coll // Dolichostyrax / n. sp. 1 / det. J. Sudre 06 // Dolichostyrax / longipes Aurivillius, 1913 / Gabriš det., 2016” (PCDH); female, “Malaysia, Sabah / Tenom / IV-1-2004 / local coll // Dolichostyrax / n. sp. / det. J. Sudre // Dolichostyrax / longipes Aurivillius, 1913 / Gabriš det., 2016” (PCDH).
Dolichostyrax longipes differs by D. moultoni by presence of a distinct bulge at apex of scape (Figs
(male). BL 9.4 mm, BW 3.5 mm. Body black, antennae and legs slightly lighter. Body densely clothed with very short golden brown pubescence, incorporating fine detritus particles. Head about as wide as anterior margin of pronotum. Antennae 1.3 times longer than body length; scape gradually only slightly widened towards apex, apical part distinctly thicker than the rest of scape, forming a distinct bulge (Fig.
Prothorax as long as wide, laterally with one indistinct tubercle; pronotal disc with a pair of indistinct tubercles near middle and one median at second half; pronotal tubercles punctured. Prosternum in front of coxae 0.6 times shorter than diameter of coxal cavity. Scutellum transverse, more than three times as wide as long. Elytra elongate, 1.4 times as long as wide at widest part, 1.6 times as long as pronotum, widest at middle; each elytron with three rows of tubercles irregular in shape and size (Figs
Male genitalia with tegmen elongate, widest before middle, basally with short strut; parameres elongate, less than half of phallobase length, with dense long setae at apical half (Fig.
BL 9.4–11.8 mm, BW 3.5–4.3 mm. Antennae 1.0–1.3 times longer than body length. Prothorax laterally with one more or less distinct obtuse tooth; pronotal disc slightly to deeply wrinkled; pronotal and elytral tubercles more distinct in other males than holotype. Male from Kinabalu Park (PCJC) large, with pubescence very dense, yellowish brown, and with slightly narrower tegmen.
Most characters same as for males. BL 11.7–12.5 mm, BW 4.3–4.9 mm. Antennae 0.9–1.0 times longer than body length. Pronotal and elytral tubercles more or less distinct; tubercles smooth or with individual punctures. Elytra elongate, 1.4–1.6 times as long as wide at widest part, 1.8–2.3 times as long as pronotum. Female genitalia with elongate ovipositor (Fig.
Malaysia: Borneo (Sabah).
Microdolichostyrax hefferni sp. n.
The genus Microdolichostyrax can be easily recognized by the following combination of characters: generally smaller habitus (BL 9.0–10.5), antennae 0.7 times as long as body, surface of scape slightly distorted (unique in Bornean Morimopsini), antennomere II 0.5–0.8 times as long as antennomere III, antennomere IV longer than antennomere III, antennomere XI longer than antennomere III, antennomeres relatively short (e.g. antennomere III length/width ratio = 1.7–1.8), mandibular apex unidentate, elytra with rows of individual tubercles, and tibial spurs 2-2-2 (Figs
The name Microdolichostyrax gen. n. refers to the smaller size of the specimens belonging to the genus, and to its similarity to Dolichostyrax Aurivillius. Gender: masculine.
Female. Body elongate, BL 9.0–10.5 mm, BW 2.9–3.7 mm. Body brown; antennae, legs and palpi lighter (Figs
Head slightly wider than anterior pronotal margin; genae convex at frontal view; frontoclypeus with midline running from interantennal groove to labrum, sparsely punctured; antennal tubercles prominent with deep depression in between; anterior margin of anteclypeus shallowly emarginate, with sparse long yellowish semi-erected setae. Labrum free, transverse, glabrous, with sparse long semi-erect setae (Figs
Prothorax sub-cylindrical, 0.9–1.0 times as long as wide, widest at middle, gradually narrowed towards posterior margin, laterally with one small obtuse tubercle; pronotal disc weakly convex, sparsely covered with deep puncturation, with a pair of tubercles near middle and one median at second half; anterior and posterior angles obtuse; pronotal tubercles punctured (Figs
Abdomen with five ventrites (Fig.
Male unknown.
Malaysia: Borneo (Sabah).
Holotype, female, “Malaysia, Sabah / Sipitang area / II-1-2003 / local coll // Dolichostyrax / longipes / Aurivillius / det J. Sudre 06 // HOLOTYPE / Microdolichostyrax / hefferni Gabriš, Kundrata / & Trnka, 2016 / gen. et sp. n.” (
This species is very similar to Microdolichostyrax minutus sp. n., but differs by slightly larger body (BL 9.8–10.5 mm vs. 9.0, respectively); body pubescence darker, chestnut brown (vs. yellowish brown; Figs
(female). BL 9.8 mm, BW 3.3 mm. Body brown; antennae, legs and palpi lighter. Body densely clothed with very short chestnut brown pubescence, incorporating fine detritus particles (Fig.
Head slightly wider than anterior pronotal margin. Antennae 0.7 times as long as body; scape enlarged, reaching about half of pronotum, gradually widened towards apex, thickest at apical part, surface slightly distorted, not smooth, covered with very short dense pubescence; the relative ratio of antennomere lengths: 3.4 : 0.7 : 1.0 : 1.2 : 1.1 : 0.9 : 0.8 : 0.8 : 0.8 : 0.8 : 1.4 (Fig.
Prothorax as long as wide, laterally with one small obtuse tubercle; pronotal disc with pair of tubercles near middle and one median at second half; pronotal tubercles punctured. Prosternum in front of coxae 0.8 times shorter than diameter of coxal cavity. Scutellum transverse, about 3.5 times as wide as long. Elytra elongate, 1.8 times as long as wide at widest part, 2.3 times as long as pronotum, widest near middle; each elytron with three rows of irregular, slightly elevated tubercles (Figs
Female genitalia with ovipositor elongate, narrow, apically with short styli (Fig.
BL 9.8–10.5 mm, BW 3.3–3.7 mm. Paratypes are slightly larger and more oval than holotype.
Malaysia: Borneo (Sabah: Sipitang, Trus Madi).
The specific name is a patronym in honor of Mr. Daniel J. Heffern (Houston, USA), who kindly provided us with the type material.
Holotype, female, “Malaysia, Sabah / Kuamut / III-13-2014 / local coll // HOLOTYPE / Microdolichostyrax / minutus Gabriš, Kundrata / & Trnka, 2016 / sp. n. “ (
Microdolichostyrax minutus sp. n.can be recognized by the smaller body (BL 9.0 mm), body pubescence paler, yellowish brown (vs. chestnut brown in M. hefferni sp. n.; Figs
(female). BL 9.0 mm, BW 2.9 mm. Body brown; antennae, legs and palpi lighter. Body densely clothed with very short yellowish brown pubescence, incorporating fine detritus particles (Fig.
Head slightly wider than anterior pronotal margin. Antennae 0.7 times as long as body; scape enlarged, reaching about half of pronotum, gradually widened towards apex, thickest at apical part, surface slightly distorted, not smooth, covered with very short dense pubescence; relative ratio of antennomere lengths: 3.2 : 0.5 : 1.0 : 1.1 : 1.0 : 0.7 : 0.8 : 0.7 : 0.7 : 0.7 : 1.5 (Fig.
Prothorax 0.9 times as long as wide, widest at middle, laterally with one small obtuse tubercle; pronotal disc with pair of tubercles near middle and one median at second half; pronotal tubercles punctured. Prosternum in front of coxae 0.9 times shorter than diameter of coxal cavity. Scutellum transverse, about three times as wide as long. Elytra elongate, 1.8 times as long as wide at widest part, 2.3 times as long as pronotum, widest near middle; each elytron with three rows of irregular, slightly elevated tubercles (Figs
Female genitalia with ovipositor elongate, narrow, apically with short styli (Fig.
Malaysia: Borneo (Sabah: Kuamut).
The name “minutus” refers to the smaller size of the species.
Eurystyrax nemethi sp. n.
The Eurystyrax nemethi gen. et sp. n. can be easily recognized by its robust body (BL 14.3 mm), genae parallel-sided at frontal view (Fig.
Female. Body robust, elongate, BL 14.3 mm, BW 5.1 mm. Body black, densely clothed with very short greyish pubescence, incorporating fine detritus particles.
Head about as wide as anterior pronotal margin, subquadrate at frontal view (genae parallel-sided); frontoclypeus with midline running from interantennal groove to labrum, sparsely punctured; antennal tubercles prominent with deep depression in between; anterior margin of anteclypeus shallowly emarginate, with sparse long yellowish semi-erected setae (Fig.
Prothorax sub-cylindrical, as long as wide, widest at middle, gradually slightly narrowed towards posterior margin, laterally without tubercles; pronotal disc sub-parallel sided, weakly convex, surface coarsely wrinkled, without distinct tubercles, sparsely covered with deep puncturation, anterior and posterior angles obtuse (Fig.
Abdomen with five ventrites; first ventrite (excluding intercoxal process) more than 1.5 times longer than second; intercoxal process short, broadly rounded (Fig.
Male unknown.
The name Eurystyrax is a combination of words “eury” (referring to the wide habitus of the holotype) and “styrax” (part of the generic name Dolichostyrax). Gender: masculine.
Holotype, female, “Nord-Borneo / Kinabalu, West- / hang, ca 2800 m // 4.III.1969 / Dr. H. Löffler leg. // Dolichostyrax / longipes Aur. / det. Breuning 72. // HOLOTYPE / Eurystyrax / nemethi Gabriš, Kundrata / & Trnka, 2016 / gen. et sp. n. “ (
(female). BL 14.3 mm, BW 5.1 mm. Body black, densely clothed with very short greyish pubescence, incorporating fine detritus particles.
Head about as wide as anterior pronotal margin, subquadrate at frontal view (genae parallel-sided); frontoclypeus sparsely punctured; anterior margin of anteclypeus shallowly emarginate, with sparse long yellowish semi-erected setae (Fig.
Prothorax as long as wide, widest at middle, laterally without tubercles; pronotal disc sub-parallel sided, weakly convex, surface coarsely wrinkled, without distinct tubercles, sparsely covered with deep puncturation, anterior and posterior angles obtuse (Fig.
Abdomen with fifth ventrite truncate apically, margin with sparse semi-erect pubescence. Female genitalia with ovipositor elongate, narrow, apically with short styli (Fig.
Male unknown.
Malaysia: Borneo (Sabah: Kinabalu).
This species is named after Mr. Tamás Németh (
Borneostyrax cristatus sp. n.
This genus is unique within Bornean Morimopsini by having bidentate mandibular apex (Fig.
Body robust, elongate, 10.8 mm long and 3.9 mm wide in male, and 12.6–14.6 mm long and 4.9–5.5 mm wide in females. Body reddish brown to dark brown; appendage joints lighter, palpi brown to black. Body very densely clothed with very short golden brown pubescence; scape, legs, scutellum, apex of elytra and abdominal ventrites covered with longer sparse semi-erected yellow setae (Fig.
Head about as wide as anterior margin of pronotum; genae convex at frontal view; frontoclypeus with distinct midline running from interantennal groove to labrum, sparsely punctured, punctures deep with setae inside; antennal tubercles prominent with moderately deep depression in between; antennal cavities opened dorsally; anterior margin of anteclypeus shallowly emarginate, with sparse long yellowish semi-erected setae. Labrum free, transverse, glabrous, covered with long, sparse semi-erect setae, apical margin with short dense pubescence (Fig.
Prothorax sub-cylindrical, as long as wide, widest at middle, laterally with one small obtuse tubercle; pronotal disc weakly convex, sparsely covered with deep puncturation, with pair of more or less distinct tubercles near middle and two median at first and second half, respectively; pronotal tubercles smooth or sparsely punctured; anterior and posterior angles obtuse. Prosternum in front of coxae 0.7 times shorter than diameter of coxal cavity, sparsely punctured; procoxal cavities circular, narrowly separated (Fig.
Abdomen with five ventrites; first ventrite (excluding intercoxal process) about or slightly more than 1.5 times longer than second; intercoxal process short, broadly rounded. Fifth ventrite with apex broadly rounded in male, truncate in females, margin with very sparse semi-erect pubescence. Male genitalia with tegmen elongate, widest at posterior 1/3, basally with long strut; parameres short, distinctly shorter than phallobase, apically with short fine setae (Figs
The name Borneostyrax is a combination of words “Borneo” (geographical origin of the genus) and “styrax” (part of the generic name Dolichostyrax). Gender: masculine.
Holotype, male, “Malaysia, Sabah / Tenom / III-12-2008 / local coll // Dolichostyrax / moultoni / Aurivillius / det J. Sudre 06 // HOLOTYPE / Borneostyrax / cristatus Gabriš, Kundrata / & Trnka, 2016 / gen. et sp. n. “ (
Female, “Malaysia, Sabah / Sipitang area / IV-11-2002 / local coll ‘Unil‘ // Dolichostyrax / moultoni / Aurivillius / det J. Sudre // Borneostyrax / cristatus Gabriš, Kundrata / & Trnka, 2016 / Gabriš det., 2016” (PCDH).
(male). BL 10.8 mm, BW 3.9 mm. Body dark brown; appendage joints lighter, palpi black. Body very densely clothed with very short golden brown pubescence; scape, legs, scutellum, apex of elytra and abdominal ventrites covered with longer sparse semi-erected yellow setae (Fig.
Head about as wide as anterior margin of pronotum; genae convex at frontal view; frontoclypeus with distinct midline running from interantennal groove to labrum, sparsely punctured; anterior margin of anteclypeus shallowly emarginate, with sparse long yellowish semi-erected setae. Labrum transverse, glabrous, covered with long, sparse semi-erect setae, apical margin with short dense pubescence (Fig.
Prothorax sub-cylindrical, as long as wide, widest at middle, laterally with one small obtuse tubercle; pronotal disc weakly convex, sparsely covered with deep puncturation, with pair of distinct tubercles near middle and two median at first and second half, respectively; pronotal tubercles sparsely punctured; anterior and posterior angles obtuse. Scutellum transverse, about three times as wide as long. Elytra elongate, 1.7 times as long as wide at widest part, 2.1 times as long as pronotum; each elytron with three rows of prominent irregular tubercles forming distinct ridges (Figs
Abdomen with five ventrites; first ventrite (excluding intercoxal process) about 1.5 times longer than second; intercoxal process short, broadly rounded. Fifth ventrite with apex broadly rounded, margin with very sparse semi-erect pubescence. Male genitalia with tegmen elongate, widest at posterior 1/3, basally with long strut; parameres short, distinctly shorter than phallobase, apically with short fine setae (Figs
Most characters same as for males. BL 12.6–14.6 mm, BW 4.9–5.5 mm. Body reddish brown to brown; appendage joints lighter, palpi brown. Antennae 0.8–0.9 times as long as body length. Maxillary and labial palpi with ultimate palpomeres fusiform (Fig.
Two females contained large larvae (two and three, respectively) inside their abdomens. The larvae filled most of the females’ abdomens and were located with their heads oriented towards the abdominal base (Fig.
Body up to 7.0 mm long and 1.6 mm wide, elongate, subcylindrical, creamy white, heavily sclerotized head capsule and mandibles darker (Fig.
Malaysia: Borneo (Sabah).
The specific name refers to the distinct ridges of tubercles on elytra (Fig.
1 | Antennomere II distinctly longer than antennomere III | Anexodus Pascoe, 1886 |
– | Antennomere II shorter than antennomere III | 2 |
2 | Body slender, narrow, parallel-sided; BL/BW = 3.5; tibial spurs 1-1-2; elytral apex truncate; elytral tubercles only at apical half (females unknown) | Pantilema Aurivillius |
– | Body more robust, mostly broadly oval; BL/BW = 2.4–3.1; tibial spurs 0-0-2 or 2-2-2; elytral apex rounded; elytral tubercles distributed along whole elytral length and/or forming distinct ridges | 3 |
3 | Antennomere III shorter than antennomere XI; antennomere II 0.4–0.7 times as long as antennomere III; antennomere III 1.7–2.4 times longer than wide | 4 |
– | Antennomere III longer than antennomere XI; antennomere II 0.2–0.3 times as long as antennomere III; antennomere III 3.2–4.1 times longer than wide | 6 |
4 | Body larger (BL 14.3 mm); genae parallel-sided at frontal view (Fig. |
(Eurystyrax gen. n.) E. nemethi sp. n. |
– | Body smaller (BL 9.0–10.5 mm); genae convex at frontal view (Figs |
(Microdolichostyrax gen. n.) 5 |
5 | Body pubescence darker, chestnut brown; antennomere II 0.7 times as long as antennomere III; spermatheca with apex rounded; sclerotized part of spermathecal duct very long, strongly coiled (Fig. |
M. hefferni sp. n. |
– | Body pubescence paler, yellowish brown; antennomere II 0.5 times as long as antennomere III; spermatheca with apex tapered; sclerotized part of spermathecal duct short, curved (Fig. |
M. minutus sp. n. |
6 | Mandibular apex bidentate (Fig. |
(Borneostyrax gen. n.) B. cristatus sp. n. |
– | Mandibular apex unidentate (Fig. |
(Dolichostyrax Aurivillius) 7 |
7 | Apex of scape thickened moderately (Fig. |
D. moultoni Aurivillius |
– | Apex of scape thickened substantially, forming distinct bulge (Figs |
D. longipes Aurivillius |
Borneo is one of the major biodiversity hotspots in the world (
The cerambycid tribe Morimopsini contains many morphologically distinct lineages, and its limits and classification are in deep need of revision (
The vast majority of insects are oviparous, i.e. their females lay eggs and embryogenesis occurs after oviposition. Ovoviviparous species retain their eggs in the genital tracts until the larvae are ready to hatch. There are no special nutritional adaptations developed in egg or female’s body; embryo uses only nutritional reserves from the egg cytoplasm. On the other hand, in truly viviparous species the embryo receives nourishment also (or only) from the parent. The ovoviviparity is sometimes considered as a transitional stage between oviparity and viviparity, but also very often treated as a special case of viviparity (
Within Coleoptera, viviparity (in all cases as ovoviviparity) has been reported only for the several phylogenetically unrelated families – adephagan Carabidae (
We are very obliged to J. Bergsten (