Anthribinae, Billberg, 1820

Orellana, Samanta & Girón Duque, Jennifer C., 2024, State of knowledge of the Anthribidae (Insecta: Coleoptera: Curculionoidea) in Colombia with a key to genera, Biota Colombiana 25, pp. 1-18 : 6-7

Subfamily Anthribinae

3(1’). Lateral prothoracic carina complete, reaching anterior margin of prothorax ( Fig. 16 , lpc). Eyes emarginate ( Fig. 21 , ee); rostrum with mesal notch ( Fig. 19 , amn). (Tribe Basitropini , in part)…………………………. Eugonus Schoenherr (observed in Colombia)

3’. Lateral prothoracic carina incomplete, not reaching anterior margin of prothorax ( Fig. 17 , lpc). Eyes variable; rostrum variable………………………………………………….……….… 4

4(3’). Rostrum short and wide (about 2.5 times wider than long), rounded or quadrangular in frontal view; antennal insertion foveiform, triangular or rounded, reaching and inserting on antero-ventral margin of eyes; antennae covered with long, erect setae (Tribe Corrhecerini )…………………….……………………………………………. 5

4’. Rostrum long (at most 2 times wider than long), quadrangular to elongate in frontal view; antennal insertion variable, not reaching antero-ventral margin of eyes; eyes variable; if antenna with long setae, rostrum very elongate………………………………………………………………….……… 6

5(4). Dorsal carina of prothorax antebasal ( Fig. 17 , dpc), with rounded angles; ventral surface covered with patches of dense setae or spines in males………..……………………..………… Nemotrichus Labram & Imhoff (observed in Colombia)

5’. Dorsal carina of prothorax basal (see Fig. 16 , dpc), with acute angles; males without ventral patches of dense setae or spines (not yet recorded from Colombia)………………………..…………. Corrhecerus Schoenherr

6(4’). Eyes emarginate at anterior margin ( Fig. 21 ), interrupted by lateral margin of rostrum…………………………………………………………………………… 7

6’. Eyes not emarginate ( Figs. 2 , 19, 20 ), oval, truncate, or at most slightly sinuous along anterior or posterior margin………………………………………………………………………….… 8

7(6). Rostrum with apical mesal notch (see Figs. 2 , 21 , amn); posterior angles of pronotum not projected; generally more than 3 mm in length (Tribe Basitropini , in part; Fig. 6 , 18 )………………………………………..……… Phaenithon Schoenherr

7’. Rostrum without apical mesal notch (see Fig. 3 ); posterior angles of pronotum posteriorly projected, acute; generally less than 3 mm in length (Tribe Zygaenodini )…………………………….…………. Eusphyrus LeConte

8(6’). Antennal insertion contiguous to anterior margin of the eye ( Fig. 3 )……………………………………………………….……..… 9

8’. Antennal insertion far from to anterior margin of the eye ( Fig. 2 )…………………………………………………………………………… 11

9(8). Antennae long, extending beyond anterior margin of elytra; posterior margin of pronotum straight to weakly sinuose; pronotum and elytra with tufts of erect scales (Tribe Platystomini , Fig. 12 )……………… Toxonotus Lacordaire

9’. Antennae short, not reaching anterior margin of elytra; posterior margin of pronotum sinuate; pronotum and elytra without tufts of erect scales……………………………………..…… 10

10(9’). Eyes entire ( Fig. 7 , 19 )………….… Euparius Schoenherr

10’. Eyes slightly sinuate………………….………. Euxuthus Jordan

11(8’). Antennae covered with long, erect setae; rostrum elongate (at least 1.2 times as long as posterior width), widened at apex, curved downwards in lateral view; dorsal carina of prothorax very close to posterior margin (Tribe Stenocerini )……………………………………..……… Stenocerus Jekel

11’. Antennae covered with short setae; rostrum variable; dorsal carina of prothorax variable in position…………………………………………………….……………….… 12

12(11’). Dorsal carina of prothorax completely posterior ( Fig. 9 , dpc; see also Figs. 6 , 12 ) or curved, reaching posterior margin of prothorax only at lateral margins (Tribe Piesocorynini )…………………………………………………………….… 13

12’. Dorsal carina of prothorax completely anterior to posterior margin of prothorax ( Figs. 1 , 20 ), straight………………………………………………………………….……… 14

13(12). Tibia and tarsi of all legs covered with long, erect setae ( Fig. 9 )……………………………………..….. Lagopezus Dejean

13’. Tibia and tarsi without long erect setae ( Fig. 10 )…………………………………..………… Piesocorynus Dejean

14(12’). Scutellar shield depressed with respect to anterior margin of elytra (Tribe Gymnognathini ).........................… 15

14’. Scutellar shield at the same level or elevated with respect to anterior margin of elytra……………….……………… 16

15(14). Mesal carina of rostrum absent; eyes oblique, sinuous along posterior margin; pygidium elongate and narrow, with anterior margin equal or narrower than posterior margin………………………….………. Domoptolis Jordan

15’. Mesal carina of rostrum present; eyes somewhat parallel, rounded; pygidium quadrangular or triangular, with anterior margin wider than posterior margin ( Figs. 8 , 20 )…………………………………….…... Gymnognathus Schoenherr

16(14’). Rostrum short, quadrangular or wider than long, flattened at apex; eyes oblique; elytra subcylindrical or quadrangular (Tribe Platyrhinini ). Lateral carina of prothorax not raised, evenly curved; rostrum straight in lateral view ( Fig. 11 )……………………………………… Strabus Jekel

16’. Rostrum long, at least 1.5 times longer than wide, subcylindrical or flattened at apex………………….…………….. 17

17(16’). Eyes elliptical; rostrum with one mesal carina; elytra with row of elevated tubercles on interstria 3, usually with tufts of erect setae (Tribe Ischnocerini )…………………………….……… Meconemus Labram & Imhoff

17’. Eyes rounded, truncate at anterior margin; rostrum with one to three longitudinal carinae ( Fig. 1 ); elytra variable, with smaller tubercles (Tribe Ptychoderini )……………………………………………………………...… 18

18(17’). Rostrum with deep and angulated apical notch ( Figs. 1, 2 , 13 )………………………………………. Hypselotropis Jekel

18’. Rostrum with deep and rounded apical notch ( Fig. 14 )……………………………….……………… Ptychoderes Schoenherr

Figures

Figures 16–21. Representative morphological characters in Anthribidae genera recorded for Colombia.

Figures 1-3. Habitus of Anthribidae subfamilies recorded in Colombia.

Figures 5-10. Representative Anthribidae species recorded in Colombia.

Figures 11–15. Representative Anthribidae species recorded in Colombia.