Cydninae, Billberg, 1820
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publication ID |
https://doi.org/ 10.11646/zootaxa.5453.3.1 |
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publication LSID |
lsid:zoobank.org:pub:8B91667E-638D-4F5C-8A83-A806474228DF |
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DOI |
https://doi.org/10.5281/zenodo.11281423 |
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persistent identifier |
https://treatment.plazi.org/id/03A1DE61-FFE7-FFDC-FF24-7833FA50478B |
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treatment provided by |
Plazi |
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scientific name |
Cydninae |
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Key to the genera of Cydninae of the Western Hemisphere (adapted from Froeschner 1960)
1. Pronotum anteriorly with deep, sharply impressed line (sometimes enclosing punctures but usually impunctate) paralleling anterior margin from side to side, never broken in a row of punctures ( Fig. 2E View FIGURE 2 )......................... Pangaeus Stål. View in CoL
1’. Pronotum anteriorly without a sharply impressed anterior line, although often with a row of punctures in the same area (rarely with partial, vague line laterally ( Fig. 2A–D, F View FIGURE 2 )............................................................. 2
2 (1’). Anterior part of osteolar peritreme modified apically into a distinctly differentiated loop, lobe, or band which is wider than basal part of peritreme and in part or wholly polished ( Fig. 4A, C–H View FIGURE 4 )................................................. 3
2’. Anterior part of peritreme without enlarged, differentiated apical structure, sometimes with a small, subapical, posterior hooklike or flaplike projection ( Fig. 4B, I View FIGURE 4 )................................................................. 9
3 (2). Osteolar peritreme with apical process elongate, transverse length three or more times width ( Fig. 4E View FIGURE 4 ).................. 4
3’. Osteolar peritreme with apical process short, transverse length not more than two times width ( Fig. 4B, D, F, H, I View FIGURE 4 )........ 5
4 (3). Osteolar peritreme an elevated, troughlike structure extending almost to lateral margin of segment where it forms a recurved, polished lobe ( Fig. 4E View FIGURE 4 )................................................................... Chilocoris Dallas. View in CoL
4’. Osteolar peritreme a transverse polished band, neither elevated, troughlike nor recurved apically ( Fig. 4I View FIGURE 4 )................................................................................................... Rhytidoporus Uhler. View in CoL
5 (3’). Hemelytron with membrane occupying half its length ( Fig. 3E View FIGURE 3 )................................................. 6
5’. Hemelytron with membrane occupying less than one-third its length ( Fig. 3A–D, F View FIGURE 3 )................................ 7
6 (5). Terminal process of peritreme small, not elongate ( Fig. 4D View FIGURE 4 )....................................... Ectinopus Dallas.
6’. Terminal osteolar process large, elongate-oval, with one to three longitudinal rugae discally ( Fig. 4C View FIGURE 4 ).... Cydnus Fabricius. View in CoL
7 (5’). Metapleural evaporatorium very limited, just outlining peritreme, not approaching metapleural lamella posteriorly ( Fig. 4G View FIGURE 4 )...................................................................................... Microporus Uhler. View in CoL
7’. Metapleural evaporatorium more extensive, occupying more than half of sclerite and nearly or quite reaching base of metapleural lamella posteriorly ( Figs. 4A–F, H,I View FIGURE 4 )...................................................................... 8
8 (7’). Terminal process of peritreme scoop-shaped or auricular, with ostiole conspicuously visible ventrally at its base ( Fig. 4H View FIGURE 4 )........................................................................................ Onalips Signoret.
8’. Terminal process of peritreme flat, simply expanded posteriorly as a more or less polished lobe, ostiole opening posteriorly, not conspicuous ventrally ( Fig. 4F View FIGURE 4 ).......................................................... Melanaethus Uhler. View in CoL
9 (2’). Posterior tibia conspicuously compressed, anterior and posterior faces glabrous, not spined; spines of posteroventral margin conspicuously longer, thinner, and more tapering than those of dorsal margin ( Figs. 8A,D View FIGURE 8 , 10A,D View FIGURE 10 ).................... 10
9’. Posterior tibia not or only weakly compressed; dorsal and ventral spines about equally developed ( Fig. 3J View FIGURE 3 )............. 11
10 (9). Labial segment II with large, semicircular, foliaceous lobe, this often hidden between anterior coxae ( Fig. 8C View FIGURE 8 )........................................................................................ Prolobodes Amyot & Serville.
10’. Labial segment II somewhat compressed, but without large, foliaceous lobe( Figs. 10D View FIGURE 10 , 12D View FIGURE 12 , 13D View FIGURE 13 , 14D View FIGURE 14 , 16D View FIGURE 16 , 17D View FIGURE 17 , 18D View FIGURE 18 )............................................................................... Cyrtomenus Amyot & Serville. View in CoL
11 (9’). Head with a complete row (extending from eye to apex of mandibular plate) of coarse, more or less contiguous punctures giving rise to numerous long hairs and usually also to a row of short, blunt pegs ( Fig. 2F View FIGURE 2 )............. Tominotus Mulsant & Rey. View in CoL
11. Head without a complete row (absent or extending not more than three-fourths of way to apical angle of mandibular plate) of coarse setigerous punctures; pegs never present ( Fig. 2D View FIGURE 2 )....................................... Dallasiellus Berg. View in CoL
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