Research Article |
Corresponding author: Michael D. Schwartz ( michael.d.schwartz@gmail.com ) Academic editor: Alfred Wheeler
© 2018 Michael D. Schwartz.
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:
Schwartz MD (2018) Ilnacora henryi, a new species of plant bug from Mexico (Heteroptera, Miridae, Orthotylinae, Orthotylini). In: Wheeler Jr AG (Ed.) A Festschrift Recognizing Thomas J. Henry for a Lifetime of Contributions to Heteropteran Systematics. ZooKeys 796: 241-252. https://doi.org/10.3897/zookeys.796.21285
|
A new species of the plant bug genus Ilnacora, tribe Orthotylini, is described from Mexico. This species, unlike any other in the genus, is characterized by a predominantly black coloration, the absence of black scale-like setae on the pronotal disk, and unique male genitalia.
Ilnacora henryi , Mexico, taxonomy
A group of North American Orthotylini genera share predominately black coloration, continuous and straight posterior margin of the eyes and head, left paramere with mitten-shaped apex, and one endosomal spicule with variable arrangement and number of spines (Schaffner and Schwartz 2008; Schwartz 2011). Among the black specimens assembled for these studies were some reminiscent of Jornandes cruralis Distant, 1893 and J. genetivus (Distant, 1884) but lacked the shagreen dorsal sculpturation of this genus (Fig.
Data for the 50 specimens examined for this study were captured using the Arthropod Easy Capture database. All specimens bear a unique specimen identifier (USI) in the form AMNH_PBI 08011948; this alphanumeric is included on the USI label also in the form of a matrix code. For clarity the prefix is included for the holotype only. Specimen data can be viewed on-line through Discoverlife.org (http://research.amnh.org/pbi/heteropteraspeciespage) and through the iDigBio web portal.
Habitus images were prepared using a Microptics/Visionary Digital photomicrographic system as developed by Roy Larimer. Multiple layers were stacked to produce the final high-depth-of-field image using Helicon Focus software. Genitalic illustrations were initially prepared as pencil drawings using a Nikon Optiphot compound microscope and camera lucida at magnifications of 100× or 200×, then scanned and rendered as graphics using Adobe Illustrator. Photographic images of female genitalic structures temporarily placed under a coverslip in shallow well-slides containing 85% lactic acid were taken with a 10× or 20× objective lens using a Nikon E800 compound microscope, photomicrographic attachment, and software. As many as 50 layers were stacked to produce a composite high-depth-of-field image. Scanning electron micrographs of gold-coated preparations were taken with a digital Philips XL30 ESEM. The distribution map was created using SimpleMappr (
Measurement data presented in Table
Specimens examined during this study came from the following collections (preceded by an institutional abbreviation) or are deposited in them followed by the names of individuals who assisted with the loan of specimens.
Distinguished from congeners by practically smooth, uniformly black body with yellow legs and antennal segments 3 and 4 (Fig.
Male: Macropterous, length 4.30–5.00 mm, width 1.40–1.65 mm (see Table
Coloration: Black, except yellow on frons adjacent to medial margin of eyes, posterior margin of eyes, antennal segment 3, labial segment 2–3, and legs; variably dusky yellow to black on antennal segment 4, labial segment 4, tarsomere 3, and claw (Fig.
Vestiture and dorsal sculpture: Sparsely distributed, long erect or reclining dark brown to black simple setae (Figs
Structure: Head (Figs
Length | Width | Antennal length | Ratio | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Total Body | Pronotum | Cuneus | Labium | Body | Pronotum | Head | Vertex | I | II | III | IV | HW/AII | VW/HW | HW/PW | AIII/AII | ||
Male (N = 10) |
Mean | 4.65 | 0.84 | 0.70 | 1.32 | 1.52 | 1.28 | 0.84 | 0.44 | 0.46 | 1.72 | 1.39 | 0.89 | 0.49 | 0.53 | 0.65 | 0.81 |
SD | 0.21 | 0.02 | 0.02 | 0.03 | 0.07 | 0.03 | 0.01 | 0.01 | 0.02 | 0.09 | 0.13 | 0.07 | 0.02 | 0.01 | 0.01 | 0.08 | |
Range | 0.70 | 0.09 | 0.05 | 0.10 | 0.25 | 0.13 | 0.04 | 0.04 | 0.06 | 0.31 | 0.50 | 0.19 | 0.07 | 0.03 | 0.05 | 0.26 | |
Min | 4.30 | 0.81 | 0.68 | 1.28 | 1.40 | 1.20 | 0.82 | 0.43 | 0.44 | 1.54 | 1.13 | 0.81 | 0.47 | 0.51 | 0.64 | 0.62 | |
Max | 5.00 | 0.90 | 0.73 | 1.38 | 1.65 | 1.33 | 0.86 | 0.46 | 0.50 | 1.85 | 1.63 | 1.00 | 0.53 | 0.54 | 0.68 | 0.88 | |
Female (N = 10) |
Mean | 4.72 | 0.87 | 0.68 | 1.35 | 1.66 | 1.33 | 0.87 | 0.46 | 0.47 | 1.70 | 1.44 | 0.87 | 0.51 | 0.53 | 0.65 | 0.85 |
SD | 0.17 | 0.02 | 0.02 | 0.05 | 0.08 | 0.03 | 0.02 | 0.01 | 0.01 | 0.04 | 0.06 | 0.02 | 0.01 | 0.01 | 0.01 | 0.04 | |
Range | 0.55 | 0.08 | 0.05 | 0.13 | 0.23 | 0.10 | 0.06 | 0.03 | 0.01 | 0.15 | 0.15 | 0.09 | 0.04 | 0.04 | 0.04 | 0.12 | |
Min | 4.50 | 0.84 | 0.65 | 1.28 | 1.58 | 1.30 | 0.84 | 0.45 | 0.46 | 1.65 | 1.38 | 0.81 | 0.49 | 0.51 | 0.63 | 0.81 | |
Max | 5.05 | 0.91 | 0.70 | 1.41 | 1.80 | 1.40 | 0.90 | 0.48 | 0.48 | 1.80 | 1.53 | 0.91 | 0.53 | 0.56 | 0.67 | 0.92 |
Genitalia: Pygophore: Dorsal margin of aperture with single, long, thin, marginally smooth, slightly curved, pointed tergal process, located just left of midline; ventroposterior margin of pygophore subquadrate, entire (without cleft) (Fig.
Ilnacora henryi, scanning electron micrographs. A simple setae on edge of cuneus, lateral view B mesothoracic spiracle and metathoracic scent-efferent system, lateral view C pretarsus, frontal view D male genitalia, caudal view. Abbreviations: tp, tergal process; lp, left paramere; mspr, mesepimeron; mtpn, metepisternum; pe, parempodium; pul, pulvillus; rp, right paramere (ap – anterior process, fp – fan-shaped spine, pp – posterior process); ph, phallotheca; vm, ventral margin of pygophore.
Female: Coloration, vestiture, and structure as in male, except body moderately larger, widest across cuneal fracture, costal margin slightly more convex, vertex wider, and antennal segment 2 pale yellow medially, narrower proximally; length 4.50–5.05 mm, width 1.58–1.80 mm (Fig.
Genitalia: Posterior margin of sternite 7: Broadly triangular posteriorly directed flap-like projection, either side of projection incised anteriad. Vestibulum: First gonocoxae and fused paratergites 8 adhered to anterior surface of first gonapophyses (Fig.
Digital female genitalic images of Ilnacora henryi. A bursa copulatrix, dorsal view B bursa copulatrix, ventral view C bursa copulatrix, anterior view D bursa copulatrix, left lateral view E posterior wall, anterior view F posterior wall dorsal view. Abbreviations: acgl, accessory (vermiform) gland; dlp, dorsal labiate plate (pmpl - paramedial plate, sd – shield shaped depression; ltmg – lateral margin); fgp, first gonapophysis (antr – anterior region, posr – posterior region); fgx-pt8, membrane from first gonocoxae and fused paratergites 8; irl, interramal sclerite (dm - dorsal margin, mp - medial portion, vp - ventral portion); irsmr, interramal sclerite medial region; latov, lateral oviduct; lfgp, left first gonaphophysis (cp – crescent-shaped process, vpl – ventral plate, mtub – medial tubercle); rfgp, right first gonaphophysis (tub – tubercle, con – condyle, plt – plate-like sclerite); sgp, second gonapophysis (pmp – paramedial projection, vp – ventral projection); vlp, ventral labiate plate.
Named to honor Dr. Thomas J. Henry for his considerable contributions to hemipteran systematics over a long, active career.
Unknown.
Several congeners of I. henryi in the U.S. and Mexico have male genitalia of similar form. All are easily denoted by the very elongate sensory lobe of the right paramere (
Only four species, I. inusta (Distant, 1884), I. mexicana Knight & Schaffner, 1976, I. schaffneri Knight, 1963, and I. tepicensis Carvalho & Costa, 1992, are distributed within the range of I. henryi. The coloration of all these sympatric species is generally greenish with various small or large areas of diffuse dark color and discrete patches of black scale-like setae on scattered regions of the dorsum; the almost entirely black I. henryi would not be mistaken for any of these other taxa.
The majority of host associations for other species of Ilnacora are in Asteraceae. The following probable asteraceous hosts are recorded in the Arthropod Easy Capture database: Ambrosia sp., A. trifida L., Artemisia sp., Chrysopsis villosa var. hispida (Hook.) A. Gray ex D.C. Eaton, Coreocarpus sp., Dyssodia papposa (Vent.) Hitchc., Ericameria nauseosa (Pall. ex Pursh) G.L. Nesom & G.I. Baird, Grindelia sp., G. hirsutula Hook. & Arn., G. perennis A. Nelson, Helianthus sp., Helianthus salicifolius A. Dietr., H. tuberosus L., Heterotheca canescens (DC.) Shinners, H. villosa (Pursh) Shinners, Iva axillaris Pursh, Parthenium sp., Solidago sp., S. rugosa Mill.
Type material. Holotype ♂: MEXICO: Sinaloa: “Santa Lucia [23.49755°N, 105.92295°W], Sin. MEX. 4000' [1219 m] 4 Aug. 1964 L.A. Kelton”, (AMNH_PBI 00112931). Holotype Ilnacora henryi n. sp. det. M. D. Schwartz, 2010 [red label]. Deposited in the collection of the Instituto de Biologia, Universidad Nacional Autonoma de Mexico, Mexico City, D.F. Paratypes: MEXICO: Colima: 9 mi NE of Comala, 19.40916°N, 103.65196°W, 18 Jul 1983, Kovarik, Harrison, and Schaffner, 1♀ (00093269) (
Thanks and gratitude are due Joe Schaffner for providing loans of Orthotylini collected during his many trips to Mexico, initially recognizing the vast number of new species in need of taxonomic study, and discussing organization of these taxa; Harry Brailovsky for providing specimens from the National Museum of Mexico; Keith Hubbard (AAFC) for expert assistance with the scanning electron microscope; Vazrick Nazari (AAFC) assisted with the photomicrographs of the female genitalia; Steve Thurston (