Bromeloecia ponsa Yau and Marshall, 2018

Yau, Tiffany & Marshall, Stephen A., 2018, A revision of the genus Bromeloecia Spuler (Diptera: Sphaeroceridae: Limosininae), Zootaxa 4445 (1), pp. 1-115: 49-53

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Bromeloecia ponsa Yau and Marshall

sp. n.

Bromeloecia ponsa Yau and Marshall   sp. n.

(Figs. 10.1–10.14)

Description: Body length 1.1–1.5 mm (males), 1. 1–1.6 mm (females).

Head: Length of anterior fronto-orbital seta 0.6x posterior seta. Flagellomere 1 with 1 long pit surrounding 5/6 of basal outer edge. Eye ovoid to almost circular; genal height 0.6x eye height.

Thorax: Katepisternum with a row of 3–4 smaller anterior setae with dorsal most seta 0.5x and almost level with strong dorsal seta.

Wing: Costa ends at 3/4 of wing length. Angle between costa and R4+5 90°. Distance between radial fork and rm 2x length of r-m; dm-cu equal in length to r-m and distance between crossveins no more than length of dm-cu. M-pseudovein slightly bent towards costa, bent posteriorly to meet level of basal portion in distal one third and ending close to wing margin.

WIPs: Ripple pattern of cell r2+3 distinct, main length of pattern generally parallel to R2+3 and costa, distally dipped, narrowest cross section at mid length of CS3. Basal angle of distal spot wide, 125°.

Male abdomen and terminalia: Syntergite 1+2 and T3 with long lateral setae, a distinctly long pair of divergent medial setae and multiple short marginal setae in between. Anteroventral arm of synsternite 6+7 similar to a laterally stretched out Ω-shape; posteroventral lobe long and curled inwards to abdominal cavity, with anteroventral edge sclerotized. Right side of epandrium without anteroventral process. Surstylus ventrally covered with mollisetae.

Hypandrium Y-shaped, lateral extension plate starts at distal half of posteromedial hypandrial processes; hypandrial arms round. Ejaculatory apodeme finger-like, ejaculatory bulb simple. Epiphallus strongly bent ventrally. Distiphallus LFS slender; FDS folded, apex reaches back to base of WS; second distal SDS shoe-hornshaped.

Female abdomen and terminalia: T6 as wide as T5, medially with a pair of widely separated setae. Each half of T8 triangular, with 1 large and 5 smaller setae. S8 rectangular. Epiproct glossy on lateral quarters. Cercus diamondshaped. Each spermatheca with 1 large apical and 1 small basal thimble-shaped pit.

Type specimens: Holotype: ♂: ECUADOR: Napo: Lago Papallacta , 00°20ʹ29ʺS, 078°10ʹ23ʺW, forest above lake, 3400 m, pans/dung, 4–8 Nov 1999, S.A. Marshall, debu00135739 ( QCAZ).  

Paratypes: ARGENTINA: Salta: Campo Quijano , FIT, 28 Feb 1992, S. A. Marshall (1♀, DEBU)   ; 30 km E Salta Campo Quijano, forest remnant, dung trap, 18–20 Feb 1992, S. A. Marshall (10♂, 12♀, DEBU)   ; 30 km E Salta Campo Quijano, El Alisal, forest remnant, FIT, 18–20 Feb 1992, S. A. Marshall (4♂, 2♀, DEBU)   ; La Cladera , forest, 1500 m, sweep roadside, 27 Feb 1992, S. A. Marshall (1♂, DEBU)   ; 22 km N La Cladera, El Ucumar, subtropical humid forest, 1550 m, Malaise FIT, 2–30 Dec 1987, S. & J. Peck (1♂, 6♀, DEBU)   ; El Maray, 50 km W Chicoana , dry, 2500 m, pan traps, 18–28 Feb 1992, S. A. Marshall (3♂, 4♀, DEBU)   . BOLIVIA: La Paz: Zongo road, 16°10ʹ04ʺS, 068°07ʹ49ʺW, alpine shrub, ~ 3800 m, on cow dung, 18 Apr 2001, S. A. Marshall (3♂, 1♀, CBFC, DEBU)   ; Zongo Valley , 16°7ʹ57ʺS, 068°06ʹ56ʺW, forest, 2600 m, pan traps, 18 Apr 2001, S. A. Marshall (1♀, DEBU)   . ECUADOR: Carchi: Guandera For. Res., 15 km E San Gabriel , 00°36ʹ00ʺN, 077°41ʹ35ʺW, 3400 m, sweeping forest trail, 1 Nov 1999, S. A. Marshall (1♂, DEBU)   ; Napo: 27 km NW Baeza , 2700 m, dung trap, 2–6 Mar 1976, S. Peck (9♂, 12♀, QCAZ, DEBU)   ; 42 km NW Baeza , 3300 m, carrion trap, 2–6 Mar 1976, S. Peck (3♂, 3♀, QCAZ, DEBU)   ; same as holotype (1♂, DEBU).

Etymology: The species name refers to the strongly arched, bridge-shaped anteroventral arm of synsternite 6+7 (Latin ‘pons’: bridge).

Comments: B. ponsa   , like B. balaena   , is found in the high elevations of the Andes, however its distribution stretches further south, to northern Argentina.


Museo de Zoologia, Pontificia Universidad Catolica del Ecuador


Ontario Insect Collection, University of Guelph