Dolichocolon fasciatum, 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 : 567-568

DOLICHOCOLON FASCIATUM SP. NOV. ( FIG. 15A–E )

Type material: Holotype ♂: AUSTRALIA: Qld./ 18 mi. N. Cairns / 13 May 1970 / R. & J. Matthews // R. W. Matthews / Note Am-238 [ ANIC].

Notes: Left and right arista are missing in the holotype.

Etymology: The adjective ‘ fasciatum ’ is derived from the noun ‘ fascia ’ meaning band, chosen because of the banded pruinosity pattern of the abdominal tergites.

Description: Body length: 8.3 mm.

Coloration and pruinescence: Head mainly black, covered with whitish-grey pruinescence. Palpus mainly black, yellowish-brown apically. Antenna black. Thorax mainly black; posterior 1/2 of scutellum reddish-yellow; scutum with four presutural dark vittae not well differentiated. Legs black. Tegula and basicosta black or dark brown. Abdomen entirely black in ground colour. Abdominal tergites 3 and 4 with a band of whitish-grey pruinescence on anterior 1/3–1/2 interrupted mediodorsally; tergite 5 pruinose on anterior 2/3; remaining surface of tergites covered with bronze-brown pruinescence ( Fig. 15B ).

Head: Compound eye bare. Postpedicel 8.6 times as long as pedicel. Vertex at its narrowest point 0.84 times as wide as compound eye in dorsal view. Lateral vertical seta weak, practically not differentiated from postocular setae ( Fig. 15A ). Seven to eight frontal setae descending below level of base of arista. Gena in profile 0.11 times as high as compound eye. Postocular setae fine, relatively long, curved anteriorly. Prementum about 1.0–1.5 times as long as wide.

Abdomen: Syntergite 1 + 2 without median marginal setae. Tergite 3 with one pair of weak median marginal setae shorter than corresponding tergite. Tergite 4 with a row of seven marginal setae. Tergite 5 with a row of marginal and discal setae.

Male terminalia ( Fig. 15C–E ): Epandrium short and convex. Hypandrial arms long, not bent anteriorly. Distal 1/3 of cerci, in lateral view, strongly bent posteriorly (but not at right angle) ( Fig. 15C ). Cerci, in posterior view, subtriangular, apically well divided from each other ( Fig. 15D ); apical medial tooth of cerci present, but not well developed. Surstylus, in lateral view, stout, not bent posteriorly, apically rounded (lobe-like) ( Fig. 15C ); in posterior view, laterodistally lobate ( Fig. 15D, E ). Surstylus covered with long and thin setulae ( Fig. 15D, E ).

Hosts: Unknown.

Distribution: Australasian: Australia (Queensland).

Figures

Figure 15. Dolichocolon fasciatum sp. nov. (holotype). A, vertex and part of left compound eye in anterolateral view; B, abdomen in dorsal view; C, terminalia in lateral view; D, terminalia in posterior view; E, distal portion of left surstylus in posterior view.