Odontocorynus

Prena, Jens, 2008, Review ofOdontocorynusSchönherr (Coleoptera: Curculionidae: Baridinae) with Descriptions of Four New Species, The Coleopterists Bulletin 62 (2), pp. 243-277 : 243-277

Key to the species of Odontocorynus

Males: antenna modified, club often with basal process, distal desmomeres often lamellate or at least asymmetrically setose; venter of middle and hind femora often with erect scales and setae; first ventrite slightly depressed or with fascicle of erect setae................................................... 1

Females: antenna unmodified AND venter of middle and hind femora with scales appressed; first ventrite convex.......................................... 16

MALES

1. Pronotum with tubercle at anterolateral margin ( Fig. 1 ).................... 2

- Pronotum with anterolateral margin simple ( Fig. 2 )......................... 7

2. Prosternum simple; elytra and pronotum vittate, odd interstriae with inconspicuous brown scales ( Fig. 20 )............ O. luteogramma new species

- Prosternum channeled, lateral margin of channel carinate at least in anterior portion; elytra not distinctly vittate............................................ 3

3. Ventrite 1 with fascicle of setae; Mexico...................................... 4

- Ventrite 1 without fascicle of setae; Mexico and elsewhere.................. 5

4. Tarsi reddish; fore leg with tarsomeres 1 and 2 with lateral fringe of long, yellow setae on inner edge; hind leg with tarsomere 3 with usual suite of setae; interstriae with setae uniform and inconspicuous....... O. creperus Boheman

- Tarsi dark; fore leg with tarsomeres 1–3 with usual suite of setae; hind leg with tarsomere 3 with tuft of long, specialized setae on inner edge; interstriae with setae approximately 2X longer than width of interstriae, erect; interstriae 1, 5, and 7 subvittate.......................... O. subvittatus Casey

5. Scape lamellate and usually flexed near middle ( Fig. 10 ); club short, barely longer than wide; Mexico.............................. O. latiscapus Champion

- Scape not flexed near middle; club elongate, 2X longer than wide......... 6

6. Club as long as width of eye; scape lamellate and widened gradually; Mexico.................................................. O. procerus new species

- Club shorter than width of eye; scape clavate; eastern and central United States......................................................... O. falsus (LeConte)

7. Dorsal vestiture inconspicuous except for continuous line of yellowish scales on elytral suture and scutellum (occasionally extended to pronotum); Mexico................................................. O. suturaflava Champion

- Dorsal vestiture of conspicuous, light colored scales, scales of elytral suture and intervals subequal.......................................................... 8

8. Desmomere 3 modified, distending to desmomere 5 ( Fig. 8 ); dorsal vestiture of slender ochreous scales intermixed with broad white scales ( Fig. 21 ); Mexico................................................... O. nunume new species

- Desmomere 3 unmodified; dorsal vestiture homogeneous (except for scutellum); Mexico and elsewhere.............................................. 9

9. Striae with scales similar to those of interstriae; central United States, Minnesota to Texas ................................... O. pulverulentus (Casey)

- Striae with very fine hairs; other distribution................................ 10

10. Scape widened in distal one-third ( Fig. 11 ) or clavate; basomere of club not or barely excised, with or without inconspicuous process ( Figs. 5–6 )...... 11

- Scape gradually widened from middle or before ( Figs. 12–14 ); basomere of club excised and with distinct conical to lamellate process ( Fig. 7 )........ 13

11. Body more elongate and with vestiture crowded on elytral disk and basal lobe of pronotum (similar to Fig. 21 ); Arizona to Durango ..... O. townsendi (Casey)

- Body stout (as in Fig. 2 ); vestiture homogeneous; other distribution...... 12

12. Rostrum curved strongly at base; dorsal vestiture with scales ovate, approximately 3X longer than wide; pronotal punctures little wider than

248 striae; scutellum with scales imbricate; United States and Canada....................................................................... O. salebrosus (Casey)

- Rostrum curved rather evenly; dorsal vestiture with scales setiform, approximately 5X longer than wide; pronotal punctures often much wider than striae; scutellum with scales rather sparse, not imbricate; Mexico to Costa Rica................................................. O. tectus (Champion)

13. Body elongate (as in Fig. 21 ); elytral apices rounded narrowly, pygidium nearly completely covered; dorsal vestiture of setiform scales, hirsute; Mexico...................................................... O. histriculus Casey

- Body stout (as in Fig. 2 ); elytral apices round leaving apex of pygidium uncovered; dorsal vestiture of ovate, appressed scales; United States and immediately adjacent areas of Canada and Mexico......................... 14

14. Antennal insertion at 0.33–0.37X length of rostrum; desmomere 1 generally much longer than 2 ( Fig. 24 ); venter of hind tibia often with blunt tooth near base of corbel ( Fig. 4 ); apex of aedeagus pointed ( Fig. 31 ); coast from North Carolina to Alabama, southeastern part of Great Plains ( Fig. 33 ).................................................................... O. calcarifer new species

- Antennal insertion at 0.25–0.32X length of rostrum; desmomere 1 at most 1.5X longer than 2; venter of hind tibia without tooth near base of corbel; apex of aedeagus blunt ( Fig. 32 ); other distribution........................ 15

15. Rostrum curved strongly at base, distal portion almost straight ( Fig. 23 ); vestiture inconspicuous; eastern and central North America............................................................................ O. umbellae (Fabricius)

- Rostrum with distal portion curved over point of antennal insertion ( Fig. 26 ); vestiture relatively dense and visible without magnification (except for very small specimens); Florida and adjacent shore of Alabama ( Fig. 35 ), supposedly Mexico...................................... O. larvatus (Boheman)

FEMALES

16. Prosternum channeled, lateral margin of channel carinate at least in apical portion.......................................................................... 17

- Prosternum simple ( O. suturaflava sometimes with indistinct ridge at apical constriction)..................................................................... 21

17. Found in eastern and central United States............... O. falsus (LeConte)

- Found in Mexico [The females of the four species that key out here are difficult to distinguish and may require direct comparison with reliably identified specimens.]........................................................... 18

18. Interstriae with setae approximately 2X longer than width of interstriae, erect; interstriae 1, 5, and 7 subvittate [inferred from male; females unknown]................................................... O. subvittatus Casey

- Interstriae with setae appressed when elongate; elytral vestiture homogeneous............................................................................ 19

19. Pronotum with punctures well-separated, intervals shiny; desmomeres 1 and 2 subequal in length......................................... O. creperus Boheman

- Pronotum with punctures crowded, intervals narrow and often longitudinally confluent; desmomere 1 twice as long as 2................................... 20

20. Vestiture erect, scales narrowed apically and usually yellow............................................................................ O. latiscapus Champion

- Vestiture rather appressed, scales blunt apically and white.............................................................................. O. procerus new species

21. Elytra conspicuously vittate, at least one interstria differently colored; Mexico.......................................................................... 22

- Elytral vestiture homogeneous or, if consisting of differently colored scales, then not vittate; Mexico and elsewhere....................................... 23

22. Elytral suture and scutellum (occasionally extended to pronotum) with continuous line of yellowish scales................. O. suturaflava (Champion)

- Even elytral interstriae with yellowish white scales, odd interstriae with inconspicuous brown scales ( Fig. 20 )............ O. luteogramma new species

23. Dorsal vestiture of ochreous to brown slender scales intermixed with broad white scales, white scales concentrated in interstriae 3–7 ( Fig. 21 ); Mexico............................................................. O. nunume new species

- Dorsal vestiture unicolored (except for scutellum).......................... 24

24. Hind tibia with outer apical angle prolonged into blunt lobe; central Mexico...................................................... O. histriculus Casey

- Hind tibia with outer apical angle not noticeably protruding; other distribution...................................................................... 25

25. Body more elongate; vestiture crowded on elytral disk and basal lobe of pronotum (similar to Fig. 21 ); Arizona to Durango ... O. townsendi (Casey)

- Body stout; vestiture usually homogeneous; distribution elsewhere........ 26

26. Pronotal punctures coarse, usually wider than interstriae; pronotum with greatest width near base; dorsal vestiture semi-erect; central Mexico to Costa Rica......................................................... O. tectus (Champion)

- Pronotal punctures approximately as wide as interstriae; pronotum with greatest width near middle; dorsal vestiture appressed; U.S.A. and Canada................................................................................... 27

27. Striae with scales similar to those of interstriae, dorsal vestiture appearing homogeneous; central United States, Minnesota to Texas .............................................................................. O. pulverulentus (Casey)

- Striae with very fine hairs, dorsal vestiture inconspicuous or appearing striped; other distribution...................................................... 28

28. Sides of rostrum coarsely punctate and subcostate, matte ( Fig. 27 ); antenna inserted near apical third of rostrum; middle tibia with distinct, others with small subapical tooth proximad of usual apical tooth ( Fig. 3 ).......................................................................... O. umbellae (Fabricius)

- Sides of rostrum finely punctate, glabrous ( Figs. 28–30 ); antenna inserted near middle of rostrum (further apicad in O. larvatus ); tibiae without additional subapical tooth..................................................... 29

29. Scape slender, subcylindrical, apex clavate and (in dorsal view) approximately of same width as apex of desmomere 1 ( Fig. 15 ); widely distributed in eastern and central North America.............................. O. salebrosus (Casey)

- Scape more-or-less compressed, apex wider than apex of desmomere 1 ( Figs. 16–17 ); southern and southeastern United States, possibly Mexico.. ................................................................................... 30

30. Rostrum curved rather evenly ( Fig. 30 ); sides of rostrum usually with punctures obsolete in anterior half; desmomeres 1 and 2 subequal in length; Florida and adjacent shore of Alabama ( Fig. 35 ), supposedly Mexico.................................................................. O. larvatus (Boheman)

- Rostrum curved strongly at base, apical portion curved less ( Fig. 28 ); sides of rostrum with punctures distinct in anterior half; desmomere 1 distinctly longer than 2; coast from North Carolina to Alabama, southeastern part of Great Plains ( Fig. 33 )................................. O. calcarifer new species 250

Figures

Figs. 1–18. Odontocorynus spp., 1–2, body shapes, male, dorsal. 1) O. creperus; 2) O. salebrosus; 3) mesotibia, O. umbellae, female; 4) metatibia, O. calcarifer, male; 5–9, antenna, club and distal desmomeres, male. 5) O. tectus; 6) O. salebrosus; 7) O. umbellae; 8) O. nunume; 9) O. creperus; 10–14, antennal scape, dorsal, male. 10) O. latiscapus; 11) O. salebrosus; 12) O. pulverulentus; 13) O. calcarifer; 14) O. umbellae. 15–18, antennal scape, female. 15) O. salebrosus; 16) O. pulverulentus; 17) O. calcarifer; 18) O. umbellae.

Figs. 19–22. Odontocorynus spp., dorsal habitus of new species. 19) O. calcarifer; 20) O. luteogramma; 21) O. nunume; 22) O. procerus.

Figs. 23–30. Odontocorynus spp., 23–26, rostrum, male, lateral. 23) O. umbellae; 24) O. calcarifer; 25) O. salebrosus; 26) O. larvatus. 27–30, rostrum, female, lateral. 27) O. umbellae; 28) O. calcarifer; 29) O. salebrosus; 30) O. larvatus.

Figs. 31–32. Odontocorynus spp. 31) O. calcarifer, aedeagus, dorsal; 32) O. larvatus, aedagus, dorsal, tegmen omitted.

Figs. 33–34. Map of central and eastern United States showing distributions of O. calcarifer, O. falsus, O. pulverulentus, and O. umbellae.

Figs. 35–36. 35) Map of Florida showing distribution of O. larvatus; 36) Map of United States (without northwest) and bordering regions showing distributions of O. salebrosus and O. townsendi.