Parasthetops striatus, Perkins, 2008

Perkins, Philip D., 2008, Facial affect recognition in individuals at clinical high risk for psychosis, Zootaxa 1864, pp. 1-124 : 24

Parasthetops striatus new species

( Figs. 25 , 29 , 98 )

Type Material. Holotype (male): South Africa: Northern Cape Province, Namaqualand, Kamieskroon , 30.12S­ 18.01E, shore washing, 30° 12' S, 18° 1' E, 27 August 1977, Endrödy­Younga (#1341). Deposited in the TMSA . Paratypes (292): South Africa: Northern Cape Province, Cape Farm Ezelsfontein , shore washing, 30° 24' S, 18° 5' E, 30 October 1977, Endrödy­Younga (#1407) (1 TMSA) ; Namaqualand, Kamieskroon , 30.12S­ 18.01E, shore washing, 30° 12' S, 18° 1' E, 27 August 1977, Endrödy­Younga (#1341) (40 TMSA) ; Namaqualand, Kamieskroon , river stones, 30° 12' S, 18° 1' E, 27 August 1977, Endrödy­Younga (#1340) (246 TMSA) ; Namaqualand, Springbok, Mesklip , in water, 29° 49' S, 17° 52' E, 30 August 1976, Endrödy­Younga (#1189) (1 TMSA) ; W. Cape, Dermbergsdraaifarm , shore washing, 30° 48' S, 17° 43' E, 19 September 1994, Endrödy & Bellamy (#3020) (4 TMSA) .

Differential Diagnosis. Among members of the rufulus group, P. striatus ( Fig. 25 ) is similar to P. rufulus in the striate­impressed elytral series, but differs distinctively therefrom by the larger size (ca. 1.86 mm vs. 1.67 mm), the much more elongate elytra, the less angulate sides of the pronotum, and the color. The aedeagi of the two species are also quite distinct ( Figs. 28, 29 ).

Description. Size (length/width, mm) holotype: body (length to elytral apices) 1.86/0.75; head 0.30/ 0.45; pronotum 0.38/0.53; elytra 1.21 /0.75. Head and pronotal disc piceous to dark brown, remainder of dorsum dark brown, maxillary palpi and legs brown, venter dark brown. Submentum and mentum microreticulate, dull, sparsely punctulate.

Head with labrum microreticulate, dull. Clypeus and frons microreticulate, dull, sparsely punctulate, punctures separated by about 1–3xpd, size about 1xef. Anteocellar sulci deep. Ocelli distinct.

Pronotum microreticulate, dull, cordate, widest in front of middle; anterior angles obtuse, posterior rectangular; sides finely margined, weakly crenulate; anterior margin shallowly arcuate over median 3/4, with narrow hyaline border; discal reliefs with punctures about 1xef, interstices about 1–3xpd; anteriorly and posteriorly punctures much larger, about 4xef; with impressions as follow: median anterior and posterior, very deeply confluent, forming median groove; a deep anterior and very large, deep oval posterior admedian; and a large anterior and smaller deep posterior adlateral on each side; foveae punctate, but not markedly; punctures on discal reliefs without discernible setae.

Elytra dull, non­carinate, series deeply striate­impressed, sides weakly arcuate, apices separately rounded; sutural apices slightly obtuse; sides smooth, weakly explanate; posterior declivity gradual. Serial punctures moderately large and deep, about 1xpd of largest pronotal punctures, interstices about 1xpd, or less; without granules. Intervals raised, width on disc about 1–2xpd. Most punctures without a discernible seta.

Metaventral disc rather flat, with midlongitudinal impression in basal 1/2. Thoracic ventrites and abdominal ventrites 1–5 clothed with dense setae except glabrous midlongitudinal prosternal ridge, glabrous dull mesoventral plaques and small glabrous shining inverted V­shaped basomedian area on metaventrite in front of intercoxal sternite. Ventrite 6 shining, with sparse setigerous punctures across distal 1/2.

Females with wide explanate elytral margin, continuing to and widest at sharply rounded posterior angles, apices truncate, conjointly forming line perpendicular to longitudinal axis of elytra.

Wings fully developed on holotype and all dissected males.

Aedeagus length ca. 0.41 mm, distal process 0.08; main­piece markedly arcuate in proximal 1/2, lateral view; distal process short, wide apically ( Fig. 29 ).

Etymology. Named in reference to the striate­impressed elytra.

Distribution. Currently known from Namaqualand in the Northern Cape Province ( Fig. 98 ).

Figures

FIGURE 25. Parasthetops striatus, dorsal and lateral habitus of holotype.

FIGURES 26–29. Parasthetops, aedeagi of holotypes. —26. P. confluentus. —27. P. namibiensis. —28. P. rufulus. —29. P. striatus.

FIGURES 97–100. Geographical distributions of Parasthetops species.