Pachycerina crinicornis ( Thomson, 1869 )

Davies, Gregory B. P. & Miller, Raymond M., 2009, Revision of Afrotropical Pachycerina Macquart (Diptera: Lauxaniidae), African Invertebrates 50 (2), pp. 295-295 : 308-309

Pachycerina crinicornis ( Thomson, 1869)

Figs 25 , 36 , 45

Lauxania crinicornis: Thomson 1869: 568 . Type locality: Mauritius.

Pachycerina crinicornis (Thomson) : Bezzi 1907: 126.

The holotype is a female specimen that is in rather poor condition (grimy and faded), but most parts are still intact, including one complete antenna. Noteworthy features of P. crinicornis are: (1) dark fronto-orbital plates, (2) distinctly brownish scape, orange-brown pedicel and yellow postpedicel (colour contrast between the scape and postpedicel is noticeable), (3) small ocellar spot and triangle, (4) hyaline wings, (5) glossy black abdomen.

Male terminalia: Surstyli long (longer than epandrium). T6 without paired spots. Gonopods asymmetric, left gonopod slightly shorter than the right gonopod. Left gonopod bearing small lateral spinule.Aedeagal apodeme short and anteriorly rounded. S5 with straight posterior processes and medial spur.

Holotype (examined): ^MAURITIUS: [no other details on label, e.g., date, collector] ( NRS).

Other material examined: MAURITIUS:3ơ 5^Macchabee Forest [20°25'S: 57°25'E], 1.vi.1971, A.M.Hutson ( BMNH) ; 2^same locality, 21.x.1961, C.M. Courtois ( MNHN) ; 1? same locality, 10.vi.1962, C.M. Courtois ( MNHN) ; 1ơ Macchabee Forest , Brise Fer Road, 11.i.1962, C.M. Courtois ( MNHN) ; 1ơ 1^Black R. [20°25'S: 57°25'E], 1.vi.1971, A.M. Hutson ( BMNH) ; 1^Nicoliere Mt [20°09'S: 57°36'E], 9.vi.1971, A.M. Hutson ( BMNH) ; 1ơ Vacoas [20°18'S: 57°25'E], 5–8.ix.1931, W.H. Ingrams ( BMNH) ; 1^‘ Mauritius’, J.E.M. Brown ( BMNH) ; 1^Phoenix [20°15'S: 57°33'E], ix.1934, W.F. Jepson ( BMNH) ; 1^‘Ile Maurice’ Guérin- Méneville ( MNHN) ; 3^Le Pouce Mt [20°11'S: 57°31'E], 29.xi.1962, C.M. Courtois ( MNHN) ; 1^Beau Bassin [20°13'S: 57°29'E], 29.vi.1937, C.M. Courtois ( MNHN) ; 1^same locality, 18.iv.1939, C.M. Courtois ( MNHN) ; 1^Trou-aux-Cerfs [20°19'S: 57°31'E], 11.iv.1965, C.M. Courtois ( MNHN) ; 4ơ 2^Macabe , 5.iv.1969, C.M. Courtois ( MNHN) ; 1^Grand Bassin [20°25'S: 57°29'E], 17.x.1969, C.M. Courtois ( MNHN) ; 1^Mt Currie , 8.xii.1960, C.M. Courtois ( MNHN) ; 1ơ Le Petrin [20°24'S: 57°27'E], 15.xii.1962, C.M. Courtois ( MNHN) ; 1ơ same locality, 2.vi.1971, A.M. Hutson ( BMNH) . REUNION:1ơ 6^Forêt de Bélouve [21°15'S: 55°32'E], 23–26.i.1955 ( MNHN) ; 2ơ 4^Plaine des Marsouins , 25–26.i.1955 ( MNHN) ; 1^Plaine des Cafres [21°10'S: 55°32'E], 27.i.1955 ( MNHN) ; 1^same locality, 4.ii.1956, J. Hamon ( MNHN) ; 1ơ 2^Hellbourg [21°03'S: 55°31'E], 22.i/ ii.1955 ( MNHN) ; 1^same locality, 27.x.1958, F. Keiser ( MHNB) ; 1ơ Saint Phillipe , Forêt de Brulé de Mare Longue [21°15'S: 55°48'E], 1–3.ii.1955 ( MNHN) ; 1ơ St Phillipe , 28.xii.1973, L. Matile ( MNHN) ; 1ơ Saint Denis [20°53'S: 55°26'E], La Montagne, 31.xii.1955, J. Hamon ( MNHN) ; unstated locality, R. Oberthür, 1899 (MNHN).

Figures

Figs 23–27. Posterior view of male terminalia: (23) Pachycerina stuckenbergi sp. n.; (24) Pachycerina vaga Adams; (25) Pachycerina crinicornis (Thomson); (26) Pachycerina gabela sp. n.; (27) Pachycerina micropunctata sp. n. Scale bar = 0.8 mm.

Figs 34–38. Dorsal view of male inner genitalia: (34) Pachycerina nigrivittata sp. n.; (35) Pachycerina vaga Adams; (36) Pachycerina crinicornis (Thomson); (37) Pachycerina micropunctata sp. n.; (38) Pachycerina seychellensis Lamb. Scale bar = 0.5 mm.

Figs 39–48. Sternite 5 of male Pachycerina species: (39) P. vaga Adams; (40) P. nigrivittata sp. n.; (41) P. gabela sp. n.; (42) P. atrimela sp. n.; (43) P. pellocera sp. n.; (44) P. stuckenbergi sp. n.; (45) P. crinicornis (Thomson); (46) P. potentilla sp. n.; (47) P.seychellensis Lamb; (48) P. micropunctata sp. n. Abbreviation: post proc – posterior process. Scale bar = 0.5 mm.