Guimaraesiella (Dicrurobates) transvaalensis Gustafsson & Bush 2020, new species

Guimaraesiella (Dicrurobates) transvaalensis Gustafsson & Bush, new species

(Figs 57–63)

urn:lsid:zoobank.org:act: 9FBC0176-0186-4B22-8C05-50E252E2EE11

Type host. Dicrurus adsimilis apivorus Clancey, 1976 —fork-tailed drongo.

Type locality. Potchefstroom, North West Province, South Africa.

Diagnosis. Guimaraesiella (Dicrurobates) transvaalensis is morphologically closest to Guimaraesiella (Di.) dicruri, but they can be separated by the following characters: (1) dorsal preantennal suture reaches ads in Guimaraesiella (Di.) transvaalensis (Fig. 59), but not in Guimaraesiella (Di.) dicruri (Fig. 10); (2) aps present on male tergopleurite IV in Guimaraesiella (Di.) dicruri (Fig. 8), but absent in Guimaraesiella (Di.) transvaalensis (Fig. 57); (3) ventral sclerite less than half as long as proximal mesosome in Guimaraesiella (Di.) transvaalensis (Fig. 61), but more than half as long as proximal mesosome in Guimaraesiella (Di.) dicruri (Fig. 12).

Description. Both sexes. Head shape and chaetotaxy as in Fig. 59. Lateral margins of preantennal area slightly convex, frons broadly flattened; marginal carina broad, irregular; dorsal preantennal suture reaching dsms and ads, but does not reach lateral margins of head; ventral anterior plate longer than broad, with concave anterior margin; coni long, broad; temples rounded; gular plate with lateral points (Fig. 59). Thoracic and abdominal segments as in Figs 57–58.

Male. Thoracic and abdominal chaetotaxy as in Fig. 57; aps absent on tergopleurite IV, but present on tergopleurites V–VII. Genitalia as in Figs 60–62: basal apodeme slender and rectangular, with rounded anterior end and slightly widened posterior end (Fig. 60). Proximal mesosome broad, long, rectangular; ventral sclerite slender, short, not reaching more than half the length of the proximal mesosome; mesosomal lobes slender, blunt anteriorly; rugose nodi prominent, but do not extend median of bulging area; 2 ames sensilla submedianly on each side anterior to gonopore; 2 pmes sensilla on each side lateral to gonopore, near rugose nodi; gonopore oval, with broad marginal thickening. Parameral heads irregular (Fig. 62). Parameral blades broad, tapering only distally (Figs 60, 62). Measurements: Ex Dicrurus adsimilis apivorus (n = 3): TL = 1.53–1.59; HL = 0.37–0.38; HW = 0.32–0.33; PRW = 0.21; PTW = 0.30–0.31; AW = 0.40–0.42.

Female. Thoracic and abdominal chaetotaxy as in Fig. 58; psps absent on tergopleurite VIII. Subgenital plate broadly trapezoidal in anterior section; lateral submarginal bulges wide; vulval margin convergent to blunt median point, with 2–3 long, slender vms on each side, and 3–4 short, thorn-like vss on each side; 4–6 long, slender vos on each side; distal 1 vos median to vss (Fig. 63). Measurements: Ex Dicrurus adsimilis apivorus (n = 3): TL = 1.72–1.95; HL = 0.38–0.42; HW = 0.34–0.36; PRW = 0.22–0.24; PTW = 0.32–0.36; AW = 0.41–0.50.

Etymology. The species epithet is a noun in apposition derived from the type locality.

Type material. Ex Dicrurus adsimilis apivorus: Holotype ♂, Potchefstroom, North West Province [as W.Trans-vaal], South Africa, 8 Feb. 1953, Brit. Mus. 1954-474 (NHML). Paratypes: 1♀, same data as holotype (NHML); 2♂, 2♀, Mabelikwa, North Transvaal, South Africa, 6 Jan. 1957, F. Zumpt, Brit. Mus. 1957-434 (NHML).