Plesianthidium ( Spinanthidium ) namaquaense Eardley & Griswold

Plesianthidium ( Spinanthidium) namaquaense Eardley & Griswold View in CoL , sp. nov.

( Figs 30–31 View FIGURE 30 View FIGURE 31 )

Diagnosis. Both sexes of Plesianthidium namaquaense can be distinguished from all Plesianthidium , except P. n el i by the combination of terga with orange distal bands and legs black ( Figs 30 View FIGURE 30 a, c). Females differ from P. neli in the typically larger size, clypeus sparsely punctate medially ( Fig. 30 View FIGURE 30 b), scutum contiguously punctate, and T5 with moderately narrow impunctate margin (approximately 2 puncture widths). Males differ from P. neli in the larger body size, clypeus strongly punctate throughout, distance between lateral ocellus and preoccipital ridge longer ( 2x ocellar diameter), and T5 with moderately narrow impunctate margin (approximately 2 puncture widths). The structure of the male T7 and S6–S8 does not differ between P. namaquaense and P. neli .

Description. Female. Lengths: face 3.2 mm; scutum 2.5 mm; forewing 7.9 mm; body 8.9 mm. Integument black, except tegula and distal margins of T1–T5 translucent orange; distal ends of tibiae and all tarsi orange ( Fig. 30 View FIGURE 30 a). Pubescence white, except vertex and scutum orangish ( Figs 30 View FIGURE 30 a, b), scopa pale yellow. Metasomal terga without distal fasciae. Preoccipital ridge rounded; distance between lateral ocellus and preoccipital ridge twice ocellar diameter; supraclypeus convex; clypeus gently convex, ventral region not modified, ventral edge crenulate, sparsely punctate, shiny between punctures; mandible with two distinct teeth and three small teeth; maxillary palpus 2-segmented; scutum densely, mostly contiguously punctate, shiny between punctures; tegula sparsely punctate medially; propodeum glabrous medioventrally; T2–T3 punctate distally; T6 weakly shouldered, not expanded laterally, without mediolongitudinal carina.

Male. Lengths: face 3.1 mm; scutum 2.6 mm; forewing 8.8 mm; body 10.2 mm. Integument black, except tegula and distal margins of T1–T6 translucent orange ( Fig. 30 View FIGURE 30 c). Pubescence white, except vertex and scutum orangish ( Figs 30 View FIGURE 30 c, d). Metasomal terga without distal fasciae. Preoccipital ridge rounded; distance between lateral ocellus and preoccipital ridge twice ocellar diameter; supraclypeus distinctly convex; clypeus distinctly convex, densely punctate throughout; mandible with three distinct teeth; maxillary palpus 2-segmented; scutum densely punctate medially, dull between punctures; tegula densely punctate; propodeum mostly impunctate posteriorly; hind trochanter without ventral spine; T6 without mediolongitudinal carina, with large posteromedially tubercle, with distinct lateral spines, with narrow impunctate distal margin, without distal flange (cf. Fig. 28 View FIGURE 28 a); T7 posterior edge tridentate with moderately large lateral and median teeth, all spines narrow, median blunt, lateral pointed (cf. Figs 28 View FIGURE 28 a, b); S4 without apicomedian comb; S5 posterior edge shallowly concave; S6 broadly convex with slight posteromedian truncation (cf. Fig. 28 View FIGURE 28 c); S7 disc short, with broad, rounded posterior concavity (cf. Fig. 28 View FIGURE 28 d); S8 with disc long, strongly concave posterolaterally, truncate posteromedially, sides straight (cf. Fig. 28 View FIGURE 28 e); gonostylus concave apicolaterally (cf. Fig. 28 View FIGURE 28 f).

Etymology. This species is named for Namaqualand, the region that includes the type locality, which is in South Africa.

Distribution ( Fig. 31 View FIGURE 31 ). This species is largely known from the coastal sandveld of central Namaqualand.

Type material. ( 28 specimens). Holotype, male. South Africa. Redelinghuys, near, 32.32S 18.27E, 2005. ix.18, C. Eardley ( 1♂ SANC 19294). South Africa. Redelinghuys, near, 32.32S 18.27E, 2005. ix.18, C. Eardley (1♀ 3♂ paratypes SANC 19287, 19298, 19299); Bowesdorp, 1931. xi.1 (2♀ 4♂ paratypes SAMC 004418); Ratelfontein and Olaf Bergfontein, between, 32.01S 18.33.E, 1995. x. 8, F.W. Gess ( 1♂ paratype AMGC 2894); Clanwilliam 5 km W, Graafwater road, 32.10S 18.50E, 1987. x.8–13, F. W. Gess ( 2♂ paratypes AMGC 2888, 1886); Jakkalsvlei, Clanwilliam, 1978. ix.27, V. Whitehead (1♀ 1♂ paratypes SAMC 006923); Klein Alexandershoek, Clanwilliam District, 32.20S 18.46E, 1987. x.8–13, F. W. Gess ( 1♂ paratype AMGC 2883); Skurfkop, near 32.0666S 18.71666E, 2007. ix.20–21, C.D. Eardley ( 2♂ paratypes SANC 12203, 19293); Skurfkop S, 32.0572S 18.6741E, 2011. ix.24, C.D. Eardley ( 1♂ paratype SANC 19313); Skurfkop, 25 NW, 32.0558S 18.6742E, 2007. ix.21, T.L. Griswold ( 1♂ paratype BLCU 722940); Hoek se Berg, 32.1478S 19.1844E, 2011. ix.23, L. Packer (1♀PC 15279 C3); Die Berg, near, 32.2097S 18.7475E, 2005. ix.20, C.D. Eardley ( 1♂ paratype SANC 19314); Piekenierskloof, Paleisheuwel, 32.37S 18.57E, 1990. x.6, F.W. Gess ( 1♂ paratype AMGC 2903); Citrusdal District, 1948. xi.1 ( 1♂ SAMC 006919); Lammerskraal, Prince Albert District, 1946. ix.1 ( 3♂ SAMC 006918); Stellenbosch, 1926. x.5, H. Brauns ( 1♂ SAMC 004419).