Caccothryptus championi, Matsumoto, 2021

Matsumoto, Keita, 2021, Six new species of the genus Caccothryptus from the Himalayas (Coleoptera: Limnichidae), European Journal of Taxonomy 739, pp. 168-184 : 174-176

Caccothryptus championi sp. nov.

urn:lsid:zoobank.org:act:DADDC62C-E4BF-479F-89B8-9E057724D7CC

Figs 3 , 7C

Diagnosis

Caccothryptus championi sp. nov. is within C. testudo group and can be distinguished by several genital characters: (1) apex of median lobe oval in ventral view; (2) concave structure between parameres an elongated narrow and deeply V-shaped with pointed end; (3) dorsal side of parameres narrowed gradually towards apical end, small bump near the apex in lateral view; (4) apical emargination of parameres V-shaped in ventral view.

Etymology

This species is named after Harry George Champion, who collected this species.

Material examined

Holotype INDIA • ♂; “ Haldwani, Dist., Kumaon , India : H.G.C. // H.G. Champion B.M. 1953-156 // NHMUK011225382 ”; BMNH.

Paratypes INDIA • 18 specs; same collection data as for holotype‚ with additional label: “ NHMUK011225383 ”, “ NHMUK011225384 ”, “ NHMUK011225385 ”, “ NHMUK011225386 ”, “ NHMUK011225388 ”, “ NHMUK011225436 ”, “ NHMUK011225441 ”, “ NHMUK011225442 ”, “ NHMUK011225443 ”, “ NHMUK011225444 ”, “ NHMUK011225492 ”, “ NHMUK011225494 ”, “ NHMUK011225495 ”, “ NHMUK011225496 ”, “ NHMUK011225497 ”, “ NHMUK011225498 ”, “ NHMUK011225499 ”, “ NHMUK011225500 ; BMNH • 6 specs; “ Haldwani, Dist., Kumaon , India: H.G.C. H.G. Champion B.M. 1953-156” // [with additional label] “ NHMUK011225387 ”, “ NHMUK011225437 ”, “ NHMUK011225438 ”, “ NHMUK011225439 ”, “ NHMUK011225440 ”, “ NHMUK011225493 ”; BMNH • 2 specs; “ Haldwani, Dist., Kumaon , India: H.G.C. // G.C. Champion B.M. 1926-146. // E. M. M. 1925. Det. G.C.C. Cacc. ripicola Ch ” // [with additional label] “ NHMUK011225548 ”, “ NHMUK011225549 ”; BMNH.

Description

Male

BODY. Elongate, oval, dorsum convex, EL: 3.33 mm, EW: 2.47 mm, PL: 0.93 mm, PW: 2.06 mm. Colour: dorsal side brown; venter brown, tibia reddish brown, tarsal claws light brown. Dorsal surface densely covered with long setae with patches of white setae forming a wavy pattern, ventral surface with relatively long setae.

DORSUM. Head: partially retracted into pronotum; overall surface smooth, densely punctured across surface. Antennae: 11 segmented, filiform, fully pubescent, antennomeres long and slender, 1 st AS widest, 2 nd AS narrow and long, 3 rd AS smallest, 4 th –11 th AS long, thin and obtusely angled on one side. Pronotum: transverse, widest at posterior end, narrowest at anterior end, narrower than elytra; anterior margin convex, posterior margin trisinuate, lateral margin convex; surface covered with dense punctation, surface between punctures smooth and shiny. Scutellum: subtriangular, large, lateral sides nearly straight. Elytra: longer than wide; anterior margin slightly convex, sinuate; anterior lateral angle nearly right angled, pointed; lateral margins strongly bordered; surface with mixtures of small fine and medium sized punctuations; elytral striae more clearly visible towards lateral end; surface between punctures smooth and shiny.

VENTER. Prosternum: concave on anterior margin, outer lateral margin concave; prosternal process as long as wide, lateral margin sinuated, posterior margin rounded. Mesoventrite: wider than long, narrowed towards posterior; anterior end concave where prosternal process fits, discrimen visible; laterally subparallel and gently curved, posteriorly flat, anteriorly trisinuate. Metaventrite: long and wide, flat on the middle; discrimen thin visible across each end. Abdomen: five clearly visible ventrites. Intercoxal process with pointed apex. Posterior margin of 1 st and 2 nd ventrites convex, 3 rd –4 th ventrites slightly concave around the middle, 5 th ventrite semioval. Surface covered with long, light yellow, recumbent setae.

LEGS. Tibia: protibia with outer and inner lateral ends curved. Meso- and metatibia with outer lateral margin almost straight, inner lateral margin straight. Tarsi: simple, segments increase in length towards

the apex, 5 th tarsal segment as long as 1 st –4 th tarsal segment combined. Tarsal claws: long, narrow, symmetrical.

GENITALIA. Aedeagus: elongate, strongly sclerotised. Base: asymmetrical, widest around basal 0.2 from both lateral and ventral view. Median lobe: approximately ¼ length of genitalia; longer than parameres; gently curved on dorsal side, slightly bisinuate on ventral side, widest at middle, narrowing towards the apex, apex with round point in lateral view; apex pointed, split into two on anterior half and edge blunt, lower half of lateral end gently concave in dorsal view; apical end oval in ventral view. Parameres: wider than median lobe in ventral view; apical emargination V-shaped, concave structure between parameres elongated narrow and deeply V-shaped with pointed end; narrowed gradually towards apical end, small bump near the apex in lateral view; gently curved on ventral side in lateral view; apex narrow oval and not overlap with median lobe, majority of parameres do not overlap median lobe with one space visible in lateral view.

Female

No morphological difference from male except for the 5 th longer abdominal ventrite. Ovipositor long, gonocoxites strongly tapering to a point.

Morphological variation

EL: 2.74‒ 2.35 mm, EW: 1.04‒ 0.87 mm, PL: 2.16‒ 1.97 mm, PW: 3.33‒ 3.01 mm.

Distribution

Caccothryptus championi sp. nov. is known only from the type locality.

Figures

Fig. 3. Caccothryptus championi sp. nov., ♂, holotype (NHMUK011225382). A. Dorsal habitus. B. Genitalia, dorsal. C. Genitalia, lateral. D. Genitalia, ventral.

Fig. 7. Close-up of Caccothryptus spp. genitalia ventral apex, ♂, holotype. A. C. brendelli sp. nov. (NHMUK011225276). B. C. arakawae sp. nov. (NHMUK011225268). C. C. championi sp. nov. (NHMUK011225382). D. C. larryi sp. nov. (NHMUK011225324). E. C. tardarsauceae sp. nov. (NHMUK011225274). F. C. abboti sp. nov. (NHMUK011225275).