Afrolimosina albitarsis, Papp, László, 2014

Papp, László, 2014, New genera of Afrotropical limosinine sphaerocerids (Diptera: Sphaeroceridae), Zootaxa 3764 (2), pp. 101-130 : 103-105

Afrolimosina albitarsis sp. nov.

( Figs 1–16 )

Type material. Holotype male ( BMSA): Malaise traps, Brachystegia woodland—BURUNDI: Bururi Prov., Réserve Naturelle de Rumonge, 04° 00.940’ S, 29° 29.560’E, 17–20.xi. 2010, 900 m, A. H. Kirk-Spriggs— Entomology Dept., National Museum, P.O. Box 266, Bloemfontein 9300, South Africa—BMSA(D) 23880.

Paratypes ( BMSA): 1 female: same data; 2 males 2 females: ibid., Réserve Naturelle Forestière de Kigwena, Circumguinean forest, 04° 05.949’ S, 29° 30.455’E, 810 m; 1 female: Malaise traps, Acacia Savanna—RSA: Free State, Brandfort Florisbad Res. Stat., 28° 46.039’ S, 29° 04.234’E, 4–6.iv.2009, A. H. Kirk-Spriggs; 4 females: Namibia, Mukve District, Popa Falls Restcamp, 18° 07’17 S, 21° 34’ 59 E, 13–16.ii.2004, A.H. Kirk-Spriggs, light traps, riverine forest.

Paratypes ( HNHM, all but one pinned on cactus prickles): 4 males 12 females (1 m with abdomen and genitalia prepared and kept in a plastic microvial with glycerol): GHANA: Ho, Volta region, N 6° 70' E 0° 03', air plankton, 15 Nov 1971, No. 475, S. Endrődy-Younga; 1 male (abdomen with genitalia in a plastic microvial with glycerol): ibid., Abuadi-Kpeze, c. 50km, 17:30–19:00, 5. 9. 1971; 1 male (in canada balsam, abdomen with genitalia in a plastic microvial with glycerol): ibid., No. 376; 1 female: Ghana: ibid., Kwadaso, on light, No. 397, 0 1.09.1969.

Description. Measurements in mm: body length 1.67 (holotype), 1.50–1.88 (paratypes); wing length 1.70 (holotype), 1.54–1.88 (paratypes); wing width 0.75 (holotype), 0.62–0.78 (paratypes).

Head. Frons subshining, frontal triangle narrow and long, reaching lunule, apex narrowly rounded. Facial plate and cheek shiny black, gena similar but finely longitudinally dashed. 3 medium-long interfrontal setae present. Anterior fronto-orbital seta 3/4 as long as posterior one, but definitely thinner. Postocellar seta indistinct, inner occipital seta almost as long as ocellar seta but thinner, outer occipitals also distinct. Vibrissa as long as 1st flagellomere and pedicel combined, genal seta upcurved, 0.12–0.13 mm. Palpus with very long (0.15 mm) apical seta. First flagellomere reddish, except apical 1/3 (there definitely dark grey). Arista 0.66 mm, aristal cilia c. 0.015 mm, first flagellomere with 0.025 mm long less dense cilia.

Thorax. Mesonotum subshining (dark microtomentose). 2 dorsocentral pairs, posterior pair very long (0.34 mm). No enlarged prescutellar acrostichal seta. Apical scutellar seta 0.52 mm (!). Pleura dull (grey microtrichose). Anterior katepisternal seta 1/4–1/3 length of the posterior one.

Legs dark brown, except tarsi: fore tarsus white, mid and hind tarsi yellow. Trochanters yellowish. Mid basitarsus long and thin. Mid basitarsus with complete rows of strong anteroventral and posteroventral setae but no enlarged ventral seta. No mid ventral seta on mid tibia. Mid tibia with short but thick ventroapical seta: 0.05 mm in male, 0.09–0.10 mm in female. Male mid femur in basal half with a row of 9–10 long apically curved setae, subapically with a thick anterior thorn (0.08 mm). Male mid tibia apical 2/3 with a row of short thick pointed seta. Mid tibial armature: anterodorsal setae at 1/4 (strong), 3/4 (very strong) and 2–3 other stronger anterodorsal between them; posterodorsal setae at 9/20 (strong), 3/4 (very strong). Hind tibia with very short (0.04 mm) ventroapical seta (both sexes).

Wing membrane yellowish grey with comparatively long microtrichia, veins ochreous. Alula very narrow, apex almost pointed. Second costal section 0.475 mm, third section 0.51. Two sub-basal setae on costa: 0.14–0.15 mm and 0.10 mm. Vein R4+5 slightly but distinctly bent up, costa ends at R4+5 apex. Intra-crossvein section of M1+2 0.29 mm, M-M crossvein 0.14 mm. Lower edge of discal cell rounded, no vein appendage there. Halter wax-yellow.

Abdomen. Abdominal tergites shiny; tergite 1+2 lighter medially but not less sclerotised, sternite 2 composed of 2 round plates of 0.08 and 0.04 mm. Abdominal membrane with scarce but long setae up to 0.07 mm.

Male and female genitalia as described under the genus.

Female. Preabdominal sternites of female small, width of tergite/sternite (1 unit = 0.011 mm): 3rd 60/20, 4th 54/21, 5th 45/22, 6th 37/29.

Etymology. The specific epithet of this new species refers to its white fore tarsi.

Figures

FIGURES 1 – 6. Afrolimosina albitarsis sp. n., hind leg, and male postabdomen and genitalia. 1 = synsternite, ventral view, 2 = sternite 5 with right side sclerite, 3 = epandrium and cerci, caudal view, 4 = hind tibia, basitarsus and 2 nd tarsomere, lateral view, 5 = hind basitarsus in higher magnification, 6 = phallus and phallapodeme, right lateral view. (BPh: basiphallus, R: right side sclerite). Scale bars: Fig. 4 = 0.4 mm, Figs 1 – 3, 5 = 0.2 mm, Fig. 6 = 0.1 mm.

FIGURES 7 – 12. Afrolimosina albitarsis sp. n., male genitalia. 7 = epandrium with base of hypandrium and surstylus, right lateral view, 8 = surstylus with ventral edge of epandrium and base of hypandrium, right lateral view in higher magnification, 9 = distiphallus, anterior view, 10 = subepandrial sclerite with process to surstylus, caudal view, 11 = postgonite, lateral view, 12 = medial part of hypandrium (“ rod ”), ventral view, connecting surfaces to arms are stressed. Scale bars: Fig. 7 = 0.2 mm, Figs 8 – 12 = 0.1 mm.

FIGURES 13 – 20. Female postabdomen and genitalia. 13 – 16 = Afrolimosina albitarsis sp. n. 13 = sternite 8, ventral view, 14 = tergite 8 with contours of sternite 8, lateral view, 15 = tergite 8, epiproct and cerci, dorsal view, 16 = spermathecae in glycerol with contours of one spermatheca in water. 17 – 20 = Biphallapodema oligodentata sp. n.. 17 = sternite 8, ventral view, 18 = hypoproct, ventral view, 19 = epiproct and cerci, dorsal view, 20 = spermathecae. Scale bar: Figs 13 – 20 = 0.1 mm.