Pterosthetops hawequas, Perkins, 2008

Perkins, Philip D., 2008, Facial affect recognition in individuals at clinical high risk for psychosis, Zootaxa 1864, pp. 1-124: 9-10

publication ID 10.17615/mqt8-8z21


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Pterosthetops hawequas

new species

Pterosthetops hawequas   new species

( Figs. 2 View FIGURE 2 , 5 View FIGURES 3–6 , 124 View FIGURES 122–125 )

Type Material. Holotype (male): South Africa: Western Cape Province, Hawaquas radio tower, shore washing, 33° 41' S, 19° 6' E, 27 October 1978, Endrödy­Younga (#1484). Deposited in the TMSA. GoogleMaps  

Differential Diagnosis. Recognized among other members of the genus by the large size, the long elytra, the shape of the pronotum, the strongly microreticulate head and pronotum, and the comparatively dull elytra ( Fig. 2 View FIGURE 2 ). The body form and sculpture are quite distinct from P. equestrius Perkins & Balfour­Browne   and P. impressus Perkins & Balfour­Browne   , two species which also have the head and pronotum strongly microreticulate. In addition, P. hawequas   lacks the unusual elytral modifications of P. equestrius   ; and is much larger than P. impressus   (ca. 2.47 vs. 1.91 mm). The aedeagus of P. hawequas   bears some similarity to that of P. equestrius   ( Figs. 5, 6 View FIGURES 3–6 )

Description. Size (length/width, mm) holotype: body (length to elytral apices) 2.47/0.94; head 0.44/ 0.59; pronotum 0.51/0.73; elytra 1.72/0.94. Dorsum dark brown or grayish brown to piceous, with a slight metallic sheen; legs dark brown.

Head with length from labroclypeal suture to posterior carina equal width between eyes; eyes large, in dorsal aspect 11 convex facets in longest series; dorsal surface nonpunctulate, except obsoletely on frons relief, strongly microreticulate and dull except shining ocelli, with sparse, short indistinct setae; frons with sides in front of eyes weakly raised but not thickened, on either side of disc vaguely shallowly depressed but inner side of impression rather steep; posteriorly between ocelli an arcuate impression, concavity posterior; clypeus with sides at posterior raised conjointly with sides of frons, sides in dorsal aspect emarginate; labrum as long as clypeus, anterior margin slightly reflexed and slightly thickened, apicomedian emargination narrow, V­shaped, attaining 1/3 length of labrum; mentum dull, strongly microreticulate; submentum effacedly microreticulate, sparsely punctulate; genae microreticulate.

Pronotum markedly cordiform, strongly explanate, anterior angles obtuse, sides weakly arcuate to rather sharply arcuate widest point at about 1/3 of length, then concavely arcuate to rectangular posterior angles, sides weakly crenulate. Anterior margin nearly straight, without distinct hyaline border; entire surface strongly microreticulate, reliefs on disc with sparse yellowish recumbent setae, anterior rim of most setal sockets raised in form of minute granule; transverse belt of moderately large, ca. 1–2xef, punctures behind anterior margin and similar belt close to base, punctures obscured by strong microreticulation; disc transversely convex, midlongitudinal sulcus interrupted behind middle to form longer and wider anterior and smaller posterior deep foveae, sides of sulcus raised very slightly in anterior and posterior 1/4; anterior admedian foveae deep, subsulciform, open ended; posterior admedian foveae larger, oval, oblique, anterior extreme not delimited; adlateral foveae very small, deep, foveae of a side joined by very narrow groove; lateral depressions virtually flat.

Elytra dull, but less strongly microreticulate than pronotum, sides very weakly arcuate for most of length, explanate margin narrow, ended just before apices, apices separately rather sharply rounded; distinctly 10­ seriate punctate, but punctures of series 1 very random from base to saddle area, some side­by­side; series 2– 4 posteriorly fusing seriatim with sutural series, remainder attaining apex; series 2–4 each forming sinuate line around costiform part of intervals 3 and 4; punctures ca. 2xef; each elytron with three distinct depressions ("saddles") as follow: in front of middle occupying intervals 2–4, behind middle occupying intervals 2–4, and shallower depression at midlength occupying intervals 5–7; anterior and posterior depressions joined by flat 2nd interval; intervals each with unilinear row of very short recumbent setae, socket of each seta with anterior rim raised to form minute granule, except setae and granules absent from depressions; intervals 3 and 4 between saddles raised and widened, with setae and socket granules randomly arranged; apical part of intervals 2–4 slightly raised.

Metaventral disc slightly concave, with deep, narrow midlongitudinal depression over basal 7/10, weak fovea near midlength of depression; ventral areas without vestiture include dull mesoventral plaques, shining mesoventral sublateral suture, and strongly shining minute basomedian triangular area on metaventrite.

Abdominal ventrites with glabrous areas shining, obsoletely finely microreticulate; ventrites 1–5 laterally very narrowly clothed with short vestiture, ventrite 1 also with basal band of vestiture; ventrites 1–4 each with straight apical fringe of contiguous flattened apically truncate and frayed setae, fringe narrowly overlapping adjacent ventrite; apical 1/2 of 5th and 6th ventrites each with transverse band of sparse setae; 6th with posterior margin weakly emarginate; last tergite apically with brush of setae on each side.

Legs with femora and tibiae with sparse short setae, femora effacedly, tibiae strongly microreticulate; protibiae with cluster of long stiff setae on medial surface near distal 1/3; setae of last protarsomere not modified.

Wings fully developed on holotype.

Aedeagus length ca. 0.46 mm; main­piece elongate, in ventral view wider in distal than in proximal 1/2, in lateral view widest near midlength, setae prominent; distal process short, wider in lateral view than in ventral view; parameres extending slightly beyond apex of main­piece ( Fig. 5 View FIGURES 3–6 ). The basal part of the aedeagus is apparently deformed in the holotype.

Etymology. Named in reference to the geographical distribution.

Distribution. Currently known only from the type locality near Hawaquas, Western Cape Province ( Fig. 124 View FIGURES 122–125 ).