Caccothryptus larryi, 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 : 176-178

Caccothryptus larryi sp. nov.

urn:lsid:zoobank.org:act:C5571EBA-C47F-4375-AD03-7D11002761B1

Figs 4 , 7D

Diagnosis

Caccothryptus larryi sp. nov. is within C. compactus group and can be distinguished by several genital characters: (1) apex of median lobe with two asymmetrical emarginations in ventral view; (2) concave structure between parameres an elongated narrow and deeply V-shaped with pointed end; (3) dorsal and ventral side of parameres smooth and elongate, narrowing towards apical end in lateral view; (4) apical emargination of parameres oval in ventral view. C. ripicola has semicircle shaped apical emargination of parameres, median lobe with symmetrical emarginations, overall genitalia long and thin, which differs significantly from C. larryi sp. nov.

Etymology

This species is named after ʻLarryʼ the cat that lives at 10 Downing Street and the current ʻChief Mouserʼ to the Cabinet Office.

Material examined

Holotype INDIA • ♂; “ AT LIGHT // Haldwani Divn . Kumaon , U.P. // 4017 // Caccothryptus ripicola Ch // Caccothryptus ripicola Champ. // H.G. Champion B.M. 1953-156 // NHMUK011225324 ”; BMNH.

Paratype INDIA • 1 ♀; “AT LIGHT // Haldwani Divn. Kumaon, U.P. // 4017 // Caccothryptus ripicola Champ. // H.G. Champion B.M. 1953-156 // NHMUK011225325”; BMNH .

Description

Male

BODY. Elongate, oval, dorsum convex, EL: 2.44 mm, EW: 2.09 mm, PL: 0.75 mm, PW: 1.68 mm. Colour: dorsal side brown; venter brown, tibia 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 not clearly visible throughout; 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 narrowly oval. 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, width gently narrowed towards apical end. Median lobe: approximately ¼ length of genitalia; longer than parameres; consistent width on basal ¾, oval on apical half, maximum width of apical ¼ in lateral view; apex flat and edge rounded, lower half of lateral end gently concave in dorsal view; dorsal and ventral end curved, narrow near the apex, apex pointed, width relatively consistent in lateral view; triangular emarginate on one side towards parameres and small emarginate directing laterally in ventral view. Parameres: wider than median lobe in ventral view; apical emargination oval, concave structure between parameres an elongated U-shaped with rounded end; smooth and elongate, narrowed towards apical end, apex pointed and overlaps with median lobe, majority of parameres overlaps with median lobe with no visible spacing in lateral view.

Female

No morphological difference from male except for the longer 5 th abdominal ventrite. Ovipositor long, gonocoxites strongly tapering to a point. EL: 2.77 mm, EW: 2.18 mm, PL: 0.77 mm, PW: 1.71 mm.

Distribution

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

Figures

Fig. 4. Caccothryptus larryi sp. nov., ♂, holotype (NHMUK011225324). 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).