Dolichocolon bequaerti, Cerretti & Shima, 2011

Cerretti, Pierfilippo & Shima, Hiroshi, 2011, World revision of Dolichocolon Brauer & Bergenstamm (Diptera: Tachinidae: Exoristinae: Goniini), Zoological Journal of the Linnean Society 162 (3), pp. 544-584 : 556

publication ID	https://doi.org/ 10.1111/j.1096-3642.2010.00689.x
DOI	https://doi.org/10.5281/zenodo.10545784
persistent identifier	https://treatment.plazi.org/id/03A887E7-CC07-FFF0-FF26-82999925F892
treatment provided by	Valdenar
scientific name	Dolichocolon bequaerti
status	sp. nov.

Treatment

DOLICHOCOLON BEQUAERTI View in CoL SP. NOV. ( FIG. 7A–F View Figure 7 )

Type material: Holotype ♂: [D. R. Congo] musèe du congo/Kunda [7°15′S 28°27′E]/ 23.XI-1910 /Dr Bequaert// Dolichocolon / paradoxum /B.B.//Dr Villeneuve det.// R. DET./605 [ RMCA]. Paratypes: 9 ♂♂, Congo Belge, Parc National de l’Upemba [Upemba National Park (central coordinates of the National Park 9°10′S 26°40′E)], Riv. Dipidi 1700 m, 10.I.1948, Mis. G.F. de Witte 1210a/Det. 8021 [ RMCA]. 1 ♂, same data, 19.i.1948 [ RMCA].

Etymology: Named after the Belgian-American naturalist Joseph Charles Bequaert (1886–1982).

Description: Body length: 9.0– 10.8 mm. Coloration and pruinescence: Head mostly black, except anterior rim of parafacial, which is red and covered with whitish-grey pruinescence. Arista and postpedicel entirely black; scape and pedicel varying from blackish-brown to yellowish. Palpus yellow. Thorax mainly black; posterior 2/3–3/4 of scutellum reddish-yellow; postalar callus brown; scutum with four presutural dark vittae, lateral vitta indistinctly outlined and reaching further forward than strong lateral posthumeral seta. Legs black. Abdomen varies from black to more or less reddish laterally; tergites 3–5 with a regular transverse band of whitish-grey pruinescence on anterior 2/3–4/5.

Head: Compound eye bare or with short and sparse ommatrichia, just visible under 50–60 ¥ magnification. Arista thickened on its basal 1/2. Second aristomere about eight to ten times as long as wide. Thickened part of third aristomere about 0.7 times as long as second aristomere. Postpedicel about seven to eight times as long as pedicel. Vertex at its narrowest point 1.2 times as wide as compound eye in dorsal view. Lateral vertical seta small, but well differentiated from postocular setae. Seven to eight frontal setae descending below level of base of arista. Fronto-orbital plate with one or two irregular rows of medioclinate setae lateral to row of frontal setae. Gena in profile about 0.2 times as high as compound eye. Postocular setae fine, relatively long, slightly bent anteriorly. Prementum about two times as long as wide.

Abdomen: Syntergite 1 + 2 without median marginal setae. Tergite 3 usually without marginal setae, but if present, then very weak and at most 0.4 times as long as corresponding tergite.

Male terminalia ( Fig. 7A–F View Figure 7 ): Epandrium short and exceptionally convex (subglobular) ( Fig. 7A, D View Figure 7 ). Cerci distally bent posteriorly; very wide basally and densely covered with erect setae; narrowing and pincer-like distally ( Fig. 7D, E View Figure 7 ). Cerci medially concave with a thin brush of medioclinate robust setulae ( Fig. 7D, E View Figure 7 ). Surstylus strongly modified: laterally compressed and bent posteriorly in lateral view ( Fig. 7A View Figure 7 ), C-shaped in posterior view ( Fig. 7D, F View Figure 7 ); characterized by a large medial extension bearing setae on medial margin ( Fig. 7F View Figure 7 ) (in some specimens examined the distal 1/3 of cerci is situated behind the medial extension of surstyli).