Hemipeplinae

Kc, Sajan & Pollock, Darren A., 2025, Review of the Hemipeplinae (Coleoptera: Mycteridae) fauna of the world with descriptions of twenty-nine new species, Zootaxa 5574 (1), pp. 1-140 : 13-14

Key to the New World Hemipeplinae (Adults)

1. Head and pronotum elongate (GHW/HL: 0.73–0.77; GPW/PL: 0.76–0.82); pronotum convex anteriorly, not emarginate; pronotal pad raised shelf-like over head (Fig. 2) (Greater Antilles: Cuba, Bahamas)......... Holopeplus gundlachi (Grouvelle, 1878)

- Head and pronotum wider (GHW/HL: 0.83–1.26; GPW/PL: 0.79–1.45); pronotum not convex anteriorly, more or less emarginate; pronotal pad not raised shelf-like over head........................... …… Hemipeplus Latreille, 1829 …2

2. Elytra truncate at the apices, most of last visible abdominal tergite exposed (Figs 3.1–4)............................. 3

- Elytra not truncate at the apices, at most a small part of last visible abdominal tergite exposed (Figs 5–23)............... 4

3. Temples not sharply produced, although roundish in some specimens; body uniformly pale brown; anterior half of pronotum distinctly more widened than posterior half (Figs 3.1, 3.2) (southeast USA, Bahamas, Cuba, Mexico)....................................................................................... Hemipeplus hemipterus Lacordaire, 1854

- Temples sharply produced and angulate; head and pronotum darker than elytra; anterior half of pronotum only slightly more widened than the posterior half (Fig. 4) ( Mexico)......................................... H. abditus Pollock, 1999

4. Temples absent (Figs 5–7).............................................................................. 5

- Temples present, although very short in some species (Figs 8–23)............................................... 7

5. Antennal scape globular or moniliform, much shorter than antennomeres II and III combined (Fig. 5) ( Cuba)........................................................................................... H. glabratus Pollock, 1999

- Antennal scape elongate, as long as or longer than antennomeres II and III combined (Figs 6–7)....................... 6

6. Body shiny rufopiceous; pronotum with narrow and deep anterior emargination; pronotal pad absent (Fig. 6) ( Belize)............................................................................... H. anishae KC & Pollock , sp. nov.

- Body dull rufotestaceous; pronotum with shallow and broad anterior emargination; pronotal pad present (Fig. 7) ( Dominican Republic).................................................................... H. dominicensis Pollock, 1999

7. Temples very distinct, at least 1/3 eye length (Figs 8–13)...................................................... 8

- Temples less distinct, less than 1/3 eye length (Figs 14–23)................................................... 13

8. Eyes small, only slightly longer than scape (Figs 8–9)........................................................ 9

- Eyes larger, distinctly longer than scape (Figs 10–13)........................................................ 10

9. Scape globular; dorsum of head without slightly raised arcuate carinae (Fig. 8B); female without median tubercule on last abdominal ventrite; color pale brown ( USA).................................... H. microphthalmus ( Schwarz, 1878)

- Scape more elongate, expanded apically; dorsum of head with slightly raised arcuate carinae with small granules (Fig. 9B); female with median tubercule on last abdominal ventrite; color rufous, darker ( Mexico)...... H. tuberculatus Pollock, 1999

10. Pronotum subquadriform (Fig. 10B); body wide (TL/GEW: 3.56–3.68) and shiny ( Brazil)..... H. quadricollis Pollock, 1999

- Pronotum subcordiform (Figs 11B, 12B, 13B); body longer (TL/GEW:4.32–6.22 and dull........................... 11

11. Pronotum deeply emarginate anteriorly; pronotal pad densely setose (Fig. 11B) ( Mexico, Guatemala)............................................................................................... H. mexicanus Grouvelle, 1896

- Pronotum shallowly emarginate anteriorly; pronotal pad not densely setose (Figs 12B, 13B)......................... 12

12. Eyes large (longer than scape + pedicel) (Fig. 12B); elytra darker than head and pronotum (Fig. 12A) ( Brazil).................................................................................. H. brasiliensis KC & Pollock , sp. nov.

- Eyes small (shorter than scape + pedicel) (Fig. 13B); head and pronotum darker than elytra (Fig. 13A) ( Venezuela).................................................................................. H. angustipennis Pollock, 1999

13. Temples short, distinctly less than 1/4 eye length (Figs 14–17)................................................. 14

- Temples longer, at least about 1/4 eye length (Figs 18–23).................................................... 17

14. Pronotum wide (GPW/PL: 1.28–1.37) and subquadrate; body short (TL/GEW: 3.01–3.11) and shiny; temples pointed (Fig. 14) ( Brazil, Peru).................................................... H. pseudoquadricollis KC & Pollock , sp. nov.

- Pronotum narrower (GPW/PL 1.00–1.26) and subcordiform; body elongate (TL/GEW: 4.63–5.08) and dull; temples more rounded (Figs 15–17)................................................................................. 15

15. Temples very small, rounded posteriorly (Fig. 16B); lateral margins of the body piceous; rest of the body rufous–rufopiceous ( Dominican Republic)........................................................... H. insularis Grouvelle, 1896

- Temples larger, slightly angulate (Figs 17–23); lateral margins of the body same color as rest of the body............... 16

16. Anterior pronotal margin more emarginate (Fig. 15B); scape shorter than the combined length of antennomeres II and III; color uniformly testaceous–rufotestaceous ( USA, Mexico)....................................... H. chaos Thomas, 1985

- Anterior pronotal margin less emarginate (Fig. 17B); scape as long as the combined length of antennomeres II and III; color unevenly rufopiceous ( Belize, Guatemala).................................... H. belizensis KC & Pollock , sp. nov.

17. Antennal scape elongate, longer than combined length of antennomeres II and III (Fig. 18B) ( Cuba)................................................................................................ H. longiscapus Pollock, 1999

- Antennal scape shorter, shorter than the combined length of antennomeres II and III............................... 18

18. Antennal scape subcylindrical (Fig. 19B); posterior pronotal lobe distinct and rounded ( Brazil)... H. gounellei Grouvelle, 1896

- Antennal scape more or less globular (Figs 20B–23B); posterior pronotal lobe not distinct if present.................. 19

19. Pronotal pad narrow and indistinct ( Mexico, S. USA) (Figs 20C, 21C).......................................... 20

- Pronotal pad wide and distinct (S. America) (Figs 22C, 23C).................................................. 21

20. Head and pronotum dull rufous, elytra rufopiceous (Fig. 20) ( Mexico, USA: TX)............... H. thomasi Pollock, 1999

- Head and pronotum shiny rufous, elytra rufous (Fig. 21) ( Mexico: Sonora)...................... H. pollocki KC , sp. nov.

21. Antennal scape slightly elongate, submoniliform (Fig. 22B); posterior pronotal lobe with median notch; pronotum deeply emarginate anteriorly; pronotal pad wider (Fig. 22C) ( Argentina)......................... H. argentinus Pollock, 1999

- Antennal scape short, moniliform (Figs 23.1B, 23.2B); posterior pronotal lobe with or without median notch; pronotum almost straight to moderately emarginate anteriorly; pronotal pad narrower (Figs 23.1C, 23.2C) ( Bolivia, Colombia?, Ecuador, Peru)............................................................................. H. bolivianus Pollock, 1999