Neodexiopsis annulipes, Macquart, 1843

Pont, Adrian C., 2012, Muscoidea (Fanniidae, Anthomyiidae, Muscidae) described by P. J. M. Macquart (Insecta, Diptera), Zoosystema 34 (1), pp. 39-111 : 49

annulipes Macquart, 1843 , Coenosia

Coenosia annulipes Macquart, 1843: 172 ( 1844: 329) , pl. 23, figs 7, 7a. Lectotype ♀, “Du Chili. M. Gay. Muséum.” ( Chile), by designation of Albuquerque (1949: 442), in MNHN.

MATERIAL. — The single syntype, under no. 1885 of the Macquart collection in MNHN, was designated as lectotype by Albuquerque (loc. cit.). It is in poor condition, being very dirty and with some mould ; left wing damaged; right wing and both mid legs missing. It has the accession no. 670.37 ( Chile, collector Gay), and is labelled by Macquart “N°. 92. / Coenosia / annulipes.” .

CURRENT IDENTITY. — The species was assigned to the genus Austrocoenosia Malloch, 1934 , by Albuquerque (loc. cit.), and it does indeed key to this genus, and to the species ignobilis Stein, 1911, in Malloch (1934: 209, 217). Comparison of the lectotype with specimens of ignobilis appeared to confirm this synonymy. In the first catalogue of South American Muscidae ( Pont 1972: 42) , the species annulipes together with ignobilis was included in the genus Coenosia Meigen, 1826 , where Coenosia annulipes Macquart, 1843 , is a junior secondary homonym of Anthomyia annulipes Macquart, 1835 , and it was given the replacement name of Coenosia chilensis Pont, 1972 . However, renewed study of the lectotype has shown that the species is correctly placed in the genus Neodexiopsis Malloch, 1920 ( Couri & Albuquerque 1979: 506; Carvalho et al. 1993: 120, 121; 2005: 189), and Neodexiopsis annulipes (Macquart) is the valid available name for the species previously listed in the catalogues as Coenosia chilensis Pont. The hind femur in Coenosia has a dorsal and anterodorsal preapical seta, whilst in Neodexiopsis there is an additional posterodorsal preapical seta. In the lectotype of annulipes , both hind femora are partially obscured, by mould and by being pressed against the abdomen, but there appears to be a posterodorsal preapical seta. At some future time, it would be safest to remove one hind leg, macerate it, and check for the presence of setae or scars on the dorsal surface of the femur.

The species ignobilis remains correctly placed in the genus Coenosia Meigen, 1826 ( Carvalho et al. 2005: 182; Pont 2001: 473; Pont & Werner, 2006: 55).