Tanytarsus hastatus Sublette et Sasa, 1994

Dantas, Galileu P. S., Amat, Eduardo, Hamada, Neusa & Giłka, Wojciech, 2022, Towards the systematics and diversity of Neotropical Tanytarsus van der Wulp (Diptera: Chironomidae): news from Colombia, Zootaxa 5129 (4), pp. 505-529 : 520-522

Tanytarsus hastatus Sublette et Sasa, 1994

( Fig. 7A–D )

Material examined. COLOMBIA, Cundinamarca department, Fusagasugá , 04°19’50”N 74°21’49”W, 1,800 m a.s.l., 07 March 2021, at light, 2 adult males, G.P.S. Dantas (CETdeA) .

Diagnostic characters. Adult male. AR 1.12. Frontal tubercles large. Tergite IX entirely covered with microtrichia, with double lateral teeth; anal tergite bands V-type, separated, ending well anterior to anal point base ( Fig. 7A, B ). Anal point robust, lanceolate, pointed, with pair of well-developed crests, area between crests with numerous small spinulae; superior volsella more or less circular at base, with concave median margin and well projecting posteromedian corner, field of microtrichia on dorsal surface absent; digitus long and pointed, fingerlike, extending well beyond margin of superior volsella ( Fig. 7C ). Median volsella with foliate lamellae ( Fig. 7D ). Inferior volsella slightly curved, with swollen round apex directed posteromedially.

Distribution and ecological notes. The present record of Tanytarsus hastatus in Colombia is the first in the Andean region and its highest known location above sea level. As a result, the vertical distribution gradient known for T. hastatus ranges from 0 to an altitude of 1800 meters. The specimens were collected in an urban area, on the seventh floor of an aparthotel.

Figures

FIGURE 7. Tanytarsus hastatus Sublette et Sasa, 1994, male. A, B: hypopygium in dorsal (A) and ventral aspect (B); C: arrangement of anal point, superior volsella and digitus; D: median volsellae; (C–D magnified ca. 2–3 times relative to A and B).