Mesoceration repandum, Perkins, 2008

Perkins, Philip D., 2008, Facial affect recognition in individuals at clinical high risk for psychosis, Zootaxa 1864, pp. 1-124 : 29-30

Mesoceration repandum new species

( Figs. 37 , 42 , 104 )

Type Material. Holotype (male): South Africa: Western Cape Province, Cederberg, Eikenboom , river stones, elev. 900 m, 32° 27' S, 19° 10' E, 29 October 1981, Endrödy­Younga (#1906). Deposited in the TMSA . Paratypes (55): Western Cape Province, Same data as holotype (26 TMSA) ; Cape­Cedarberg, Olifants R., Boshof , shore washing, 32° 2' S, 18° 59' E, 20 August 1983, Endrödy­Younga & Penrith (#1951) (1 TMSA) ; Jan Dissels River , stones in current, 32° 14' S, 19° 0' E, 22 April 2005 (2 AMG) ; Tentskloof River , ex. stones in current, 32° 37' S, 19° 10' E, 13 April 2005 (4 AMG) ; W. Cape, Cedarberg Pass , from river bed, 32° 23' S, 19° 6' E, 2 September 1979, Endrödy­Younga (#1629) (9 TMSA) ; W. Wiedouw farm, shore washing, 31° 43' S, 18° 43' E, 19 August 1983, Endrödy­Younga (#1946) (4 TMSA) ; Wiedouw farm, river stones, 31° 43' S, 18° 43' E, 19 August 1983, Endrödy­Younga (#1945) (9 TMSA) .

Differential Diagnosis. Among distinctum group members, M. repandum individuals are similar to those of M. disjunctum in size and body proportions; differing therefrom by the dull, effacedly microreticulate pronotal reliefs, and the lack of granules on the elytral series ( Figs. 36 , 37 ). The aedeagus, while quite distinct from the other members of the group, shows some similarity to that of M. disjunctum ( Figs. 41, 42 ).

Description. Size (length/width, mm) holotype: body (length to elytral apices) 1.77/0.68; head 0.34/ 0.42; pronotum 0.37/0.47; elytra 1.03/0.68. Dorsum black or piceous, moderately dull, maxillary palpi and legs dark brown, venter piceous.

Head with labrum microreticulate, dull. Clypeus microreticulate, sparsely punctulate. Frons disc effacedly microreticulate, very weakly shining, finely punctulate, punctures separated by about 1–3xpd, frons markedly microreticulate laterally; anteocellar sulci moderately deep. Ocelli distinct. Mentum microreticulate, finely punctulate.

Pronotum cordate, widest in front of middle; anterior angles rounded, posterior rectangular; sides finely margined, feebly crenulate; anterior margin shallowly arcuate over median 3/4, without hyaline border; moderately convex, microreticulate, less strongly so on weakly shining reliefs, finely moderately densely punctate on discal reliefs, punctures about 2xpd of frons punctures; anteriorly and posteriorly very strongly and distinctly, almost rugosely, punctate; with 10 distinct foveae as follows: two median, an anterior elongate and round posterior, shallowly, if at all, confluent; a small round anterior and slightly larger oval posterior admedian; and a large oval anterior and large elongate posterior adlateral on each side; foveae dull; each puncture with a fine short seta.

Elytra almost parallel­sided, apices rounded; sutural apices rectangular; sides smooth, weakly explanate. Serial punctures small, deep, largest about 1xpd largest pronotal punctures, becoming progressively finer apically, punctures separated by about 1xpd near base, by about 2xpd apically. Series 1 weakly striate­impressed. Seven series between suture and carina, 6th interval discrete to base; anterior rim of socket of each punctural seta simple, not at all granuliform. Intervals, except 8th, flat, width on disc about 2–3xpd, each with unilinear row of minute, moderately widely separated granules; 8th distinctly carinate. All punctures bearing a short fine seta.

Thoracic ventrites and abdominal ventrites 1–4 densely clothed with short setae, except glabrous midlongitudinal ridge on proventrite, mesoventrite plaques, and small glabrous strongly shining subtriangular area basomedially on metaventrite. Metaventrite with midlongitudinal groove. Abdominal ventrites as follow: 1st with sublateral basal carina on each side; 5th similarly clothed in anterior 2/3, posterior 1/3 glabrous and shining; 6th glabrous and obsoletely microreticulate, with posterior band of piliferous punctures.

Legs of male with two spiniform setae on apical protarsomere. Femora and tibiae effacedly microreticulate.

Females with explanate margin of elytra slightly wider than in males, apices more distinctly obliquely truncate.

Wings fully developed on holotype and all dissected males.

Aedeagus length ca. 0.29 mm; main­piece short and very thick, markedly arcuate in lateral view, apex sharply pointed; distal piece markedly sinuate, more than 1/2 as long as main­piece; parameres terminating well beyond apex of main­piece ( Fig. 42 ).

Etymology. Named in reference to the bent backward shape of the aedeagal apex.

Distribution. Currently known from several localities in western Western Cape Province ( Fig. 104 ).

Figures

FIGURE 36. Mesoceration disjunctum, dorsal and lateral habitus of holotype.

FIGURE 37. Mesoceration repandum, dorsal and lateral habitus of holotype.

FIGURES 40–43. Mesoceration, aedeagi of holotypes. —40. M. durabilis. —41. M. disjunctum. —42. M. repandum. —43. M. reticulatum.

FIGURES 103–104. Geographical distributions of Mesoceration species.