Chryasus, Champion, Champion

Prena, Jens, 2024, Consolidation of Aniops Casey, Psiona Casey, Preglyptobaris Bondar and Prospoliata Hustache with Chryasus Champion (Coleoptera, Curculionidae, Baridinae) and descriptions of new species, Zootaxa 5492 (1), pp. 1-24 : 20-22

Synopsis of named species

Chryasus bicolor ( Bondar, 1946) comb. n. (from Preglyptobaris ) = Prospoliata bicolorata Hustache, 1950 syn. n.

Chryasus bicuspis Prena sp. n.

Chryasus bruniceps ( Bondar, 1946) comb. n. (from Sphenobaris , originally Amphibaris ) Chryasus carinulosus ( Casey, 1922) comb. n. (from Psiona )

Chryasus cavernosus Champion, 1908

Chryasus clunis Prena sp. n.

Chryasus densus ( Casey, 1922) comb. n. (from Psiona ) = Psiona opaca Casey, 1922 syn. n.

Chryasus macer Prena sp. n.

Chryasus montyi Prena sp. n.

Chryasus multistriatus ( Chevrolat, 1880) comb. n. (from Psiona , originally Baris ) Chryasus nimius Prena sp. n.

Chryasus persimilis Prena sp. n.

Chryasus plagiatus Champion, 1908

Chryasus pomponella Prena sp. n.

Chryasus sculpturatus ( Casey, 1922) comb. n. (from Aniops )

Chryasus taironius Prena sp. n.

Chryasus talamanca Prena sp. n.

Chryasus wappesi Prena sp. n.

1 Pronotum humped, highly arched in lateral view; body length 4.3–6.4 mm....................................... 2

- Pronotum not humped; body length 1.9–3.4 mm............................................................ 6

2 Elytron or pronotum reddish............................................................................ 3

- Elytron and pronotum black............................................................................ 5

3 Pronotum red with subtly vermiculate disc, procoxae separated by distinctly less than their own width................................................................................................... 1. C. bicolor (Bondar)

- Pronotum black with interspaces modified as pronounced ridges, procoxae separated by their own width ( Fig. 15 )........ 4

4 Elytron entirely reddish brown, pronotum less humped, male metaventrite projected anteriorly and deeply cleft by discrimen..................................................................................... 2. C. bicuspis sp. n.

- Elytron reddish brown with broad yellow ochre fascia in middle, pronotum excessively humped, male metaventrite tumid and not cleft by discrimen............................................................... 3. C. pomponella sp. n.

5 Body slender, elytra almost 1.4x longer than wide; Costa Rica................................... 4. C. nimius sp. n.

- Body stout, elytra less than 1.3x longer than wide; northeastern South America..................... 5. C. wappesi sp. n.

6 Pronotal disc with punctation subsumed in narrow furrows, interspaces forming oblique vermicular ridges.............. 7

- Pronotal disc with punctation mostly separate, interspaces forming at most a few short oblique ridges................. 15

7 Body short rhomboidal, greatest width at humeri and rapidly narrowing from there; distance between procoxae subequal to distance between procoxa and anterior pronotal constriction ( Fig. 14 )............................................ 8

- Body elongate, more gently or not at all narrowing in basal third behind humeri; distance between procoxae shorter than distance between procoxa and anterior pronotal constriction ( Fig. 13 ).......................................... 10

8 Elytron black with reddish vitta on interstriae 2–6................................................ 6. C. plagiatus

- Integument plain brown................................................................................ 9

9 Male with antenna inserted in distal third of rostrum; Brazil....................................... 7. C. bruniceps

- Male with antenna inserted at mid-length of rostrum......... [unassigned specimens from Costa Rica ( Fig. 33 ) and Brazil]

10 Integument glossy, microreticulation inconspicuous; pronotum with punctation completely subsumed in longitudinal channels; elytral disc with pronounced, angularly raised interstriae..................................................... 11

- Integument matte, microreticulate; pronotum with punctation vestigial but present; elytral disc with less pronounced, often only finely ridged interstriae............................................................................... 12

11 Body slightly stouter, red and/or black, elytron with ochre median fascia; pronotum proportionately larger and wider......................................................................................... 8. C. talamanca sp. n.

- Body very slender, black; pronotum notably small............................................. 9. C. macer sp. n.

12 Pronotum subconical; eyes bulging; integument red, elytron with indistinct subbasal fascia; Lesser Antilles ( Guadeloupe)....................................................................................... 10. C. multistriatus

- Pronotum with sides convex; eyes flat; elytron without fascia; distribution continental............................. 13

13 Elytron reddish ochre, pronotum and ventrites darker; Colombia.............................. 11. C. taironius sp. n.

- Integument plain brown; distribution different............................................................. 14 14 Integument chestnut brown; total length 2.6 mm; Brazil........................................ 12. C. carinulosus

- Integument darker, fuscous; total length 2.9–3.3 mm; Costa Rica................................ 13. C. montyi sp. n.

15 Pronotal disc and elytral striae coarsely punctate........................................................... 16

- Pronotal disc and elytral striae shallowly punctate.......................................................... 17

16 Pronotal collar with deep pits separated by longitudinal ridges; Central America..................... 14. C. cavernosus

- Pronotal collar without deep pits; Mato Grosso ( Brazil)............................................. 15. C. densus

17 Appendages comparatively long, rostrum almost 3x as long as eye; total length 2.1–2.8 mm; Central America.......... 18

- Appendages shorter, rostrum 2x as long as eye; total length 1.8–2.5 mm; Central and South America.................. 19

18 Male ventrite 5 strikingly tumid; pronotum and elytron with microscopic setae; femoral denticles developed; Cordilleras de Guanacaste and Tilarán in Costa Rica...................................................... 16. C. clunis sp. n .

- Male ventrite 5 not tumid.................. [unassigned specimens from Costa Rica and elsewhere in Central America]

19 Elytra with sides converging from basal third to apex; femoral denticles distinct; Costa Rica....... 17. C. persimilis sp. n.

- Elytra subparallel in basal half; femoral denticles obsolete; South America...................................... 20

20 Pronotum and elytron with white setae about 5–6x longer than wide; Mato Grosso, Brazil............ 18. C. sculpturatus

- Pronotum and elytron with shorter setae............ [unassigned specimens from Brazil ( Fig. 47 ) and Colombia ( Fig. 48 )]

Figures

FIGURES 13–15. Changes in extension and relative position of morphological parts on the prosternum associated with increased gibbosity of the pronotum and simultaneously shortened prosternum (ID = intercoxal distance; LR = length of lateral ridge of prosternal channel). 13, Chryasus montyi, with ID <LR; 14, Chryasus sp. near C. bruniceps, Costa Rica (see Fig. 33), with ID = LR; 15, Chryasus wappesi, with ID> LR.

FIGURES 30–33. Chryasus, dorsal and lateral aspects of males. 30, C. wappesi, El Pauchi in Bolivar, Venezuela; 31, C. plagiatus, Puerto Viejo de Sarapiquí in Heredia, Costa Rica; 32, C. bruniceps, Agua Preta in Bahia, Brazil; 33, Chryasus sp., Finca E. Rojas north of Cariari in Limón, Costa Rica.

FIGURES 34–47. Chryasus talamanca complex, dorsal and lateral aspects. 34, Male holotype, Buquete in Chiriquí, Panamá; 35, Female paratype, Buquete in Chiriquí, Panamá; 36, Teneral female from gall of Miconia pittieri, Monteverde in Puntarenas, Costa Rica; 37, Female, P.N. Tapantí in Cartago, Costa Rica.

FIGURES 46–48. Chryasus, dorsal and lateral aspects of males. 46, C. persimilis, male, Estac. Pitilla in A.C. Guanacaste, Costa Rica; 47, Chryasus sp. near C. sculpturatus, Município de São Paulo, Brazil; 48, Chryasus sp., San Lorenzo in Magdalena, Colombia.