Mesoconius hirsutimamma, Marshall, 2019

Marshall, Stephen A., 2019, A revision of the genus Mesoconius Enderlein (Diptera, Micropezidae, Taeniapterinae), European Journal of Taxonomy 548, pp. 1-126 : 33-35

Mesoconius hirsutimamma sp. nov.

urn:lsid:zoobank.org:act:2DA4B03F-AC09-4DB1-88BF-5BC39E0A19DF

Fig. 10

Etymology

The specific name is a noun in apposition that translates loosely to ʻhairy nippleʼ, referring to the distinctive katatergite.

Material examined

Holotype

COLOMBIA • ♀; Cundinamarca, PNN Chingaza, Bosque Palacio ; 04°31ʹ N, 73°45ʹ W; 2930 m a.s.l.; 13–31 Oct. 2000; E. Raigoso leg.; MYCRO329-18 sequenced for CO1; IAVH.

Description (females only)

LENGTH. 19 mm.

COLOUR. Head black anterior to ocelli, except for golden setulose first flagellomere, upper back of head reddish, clypeus orange medially, lower face and parafacial strips pale. Thorax mostly black, but with distinct orange areas including katatergite and surrounding area, postpronotal lobe and scutellum apex. Fore leg black, except for mostly orange coxa and yellow tarsomeres; base of tarsomere 1 apparently black because of dense black setulae. Mid and hind femora narrowly black at base, but otherwise reddish orange, mid and hind tibae orange, tarsi mostly black. Wing uniformly dark yellowish, without clear spots or bands. Abdominal tergites black, extreme apex of oviscape orange; pleuron white.

HEAD. Frontal vitta elongate, broadly reaching anterior and posterior head margins, middle weakly delineated from fronto-orbital strip. One strong fronto-orbital bristle inserted in fronto-orbital strip near lower margin of epicephalon. Upper face broad, distinctly elevated, face otherwise pale, membranous and microtrichose, subantennal areas shiny. Clypeus shiny, bare, distinctly striate.

THORAX. Cervical sclerite with a small, bare anterior portion, with a carina separating it from a middle portion that is depressed far below large, convex microtrichose posterior portion. Notum finely and densely microtrichose, acrostichal and dorsocentral setulae long and in distinct rows. Postpronotal lobe densely microtrichose, with several setae on ventral half only; anterior margin almost vertical, bare and shiny dorsally; posterior margin microtrichose and sloped. Dorsocentral bristle golden, twice as long as scutellum. Scutellum with four small discal setulae and long, closely spaced golden apical bristles (longer than scutellum). Katatergite very prominent, with a long, nipple-like setulose pointed process. Notopleuron with two widely spaced black bristles. Vertical row of katepisternal bristles black. All coxae with golden anteroventral setae.

ABDOMEN. Abdominal segment 1 and base of segment 2 petiolate; length of 1+2 slightly less than double length of tergite 3. T1 setose, with preapical long, thin lateral setae. Oviscape bulbous basally, somewhat flattened distally; bare except for scattered setulae. Bursa elongate, ventral receptacle prominent, with a distinct head. Single spermathecal duct branching off a long, broad common duct; single spermatheca greatly reduced, single duct very short. Paired spermathecal duct divided into distinct parts including a rugose basal ⅔ that abruptly transforms into a relatively smooth distal ⅓. Paired spermathecae expanded distally to deeply invaginated apex, surface ringed with transverse striae, stem (beyond division of paired duct) elongate and conspicuously tuberculate.

Remarks

The broad, yellow-brown wings, the prominent orange katatergite, red mid and hind femora with a narrow black base, and the orange tibiae are diagnostic for M. hirsutimamma sp. nov.

Figures

Fig. 10. Mesoconius hirsutimamma sp. nov. A. Holotype, ♀, IAVH. B–C. Spermathecae and associated structures. Abbreviations: pd(b) = paired spermathecal duct (basal section); pd(d) = paired spermathecal duct (distal section); ps = paired spermatheca; pss = paired spermathecal stem; sd = single spermathecal duct; ss = single spermatheca; vr = ventral receptacle.