Bromeloecia coniclunis 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 : 91-95

Bromeloecia coniclunis Yau and Marshall sp. n.

(Figs. 19.1–19.16)

Description: Body length 1.2–1.8 mm (males), 1.3–2.2 mm (females).

Head: Flagellomere 1 with 2–3 very small circular pits on basal outer edge. Genal height 0.5x eye height; gena with 6 – 7 setulae at genal margin and anteroventral corner.

Wing: Angle between costa and R4+5 75°. Distance between radial fork and r-m 2.8x length of r-m; dm-cu subequal to length of r-m and distance between crossveins slightly shorter than length of dm-cu. M-pseudovein slightly bent towards costa, bent posteriorly but remained anterior to basal portion in distal half and ending very close to wing margin.

WIPs: Basal angle of distal spot wide, 95°; posterior edge curved posteriorly or slightly elbowed at distal half.

Legs: Fore femur ventrally with 1 large ventrobasal seta and distal to it, 2 close rows of strong offset setae, usually a total of 5–7, posteroventrally with a row of 4–5 strong setae on distal one third of femur, second last seta strong; female with 1 large ventrobasal seta and a continuous row of 8–9 posteroventral setae along length of femur, second last seta strong. Male fore tibia anteroventrally with a comb of 16–17 small stout setae on distal three quarters; comb absent in females.

Male abdomen and terminalia: S5 medially with some desclerotization, setae at edge of desclerotization directed posteromedially. Anteroventral arm of synsternite 6+7 posteromedially with a row of microtrichia, apex tapering and curled. Both left and right anteroventral processes of epandrium articulating with lateral extension plate of hypandrium. Subanal plate cone-shaped with a pair of strong setae. Subepandrial sclerite medially rectangular plate-like with thin lateral arms. Cerci straight and converging. Surstylus quadrate and wraps around cercus anteriorly; anteroventral surface covered with setae.

Hypandrium with lateral extension plate starting from distal half of posteromedial hypandrial process; outer margin of extension plate articulating with slender hypandrial arms. Phallapodeme simple rod-like. Ejaculatory apodeme and bulb not observed. Distiphallus FDS slender, apically tapered; SDS thin, medially desclerotized; MS olive-shaped, distally with 3 leaves of membrane.

Female abdomen and terminalia: Each half of T8 shaped as an isosceles triangle. S8 wide, bell-shaped. Epiproct glossy on lateral thirds. Cercus diamond-shaped. Each spermatheca with large apical thimble-shaped pit and 4 small basal pits.

Type specimens: Holotype: ♂: BOLIVIA: La Paz: Coroico, Cerro Uchumachi , 16°12ʹ43ʺS, 067°42ʹ49ʺW, elfin forest, 2550 m, dung pans, 5–6 Apr 2001, S. A. Marshall, debu00188983 ( CBFC).

Paratypes: BOLIVIA: La Paz: Caranavi , 15°49ʹ00ʺS, 067°33ʹ00ʺW, compost pans, 13–15 Apr 2001, S. A. Marshall (2♂, DEBU) ; Caranavi , 10 km NW, road to ENTEL tower, 15°46ʹ35ʺS, 067°35ʹ48ʺW, 1400 m, dung pans, 13 Apr 2001, S. A. Marshall (1♂, 1♀, DEBU) ; same as holotype (18♂, 25♀, CBFC, DEBU); ditto, 5–16 Apr 2001 (21♂, 19♀, CBFC, DEBU) ; Coroico, Cerro Uchumachi, 16°12ʹ43ʺS, 067°42ʹ49ʺW, cloud forest, 2550 m, 5 Apr 2001, S. A. Marshall (1♂, DEBU); Cumbre Alto Beni, 28 km E Caranavi , 15°40ʹ31ʺS, 067°29ʹ21ʺW, ~ 1400 m, dung pans, 14 Apr 2001, S. A. Marshall (2♂, 4♀, DEBU) . ECUADOR: Napo: Baeza , 17 km NE, 1400 m, carrion trap, 3–6 Mar 1976, S. Peck (1♀, DEBU) ; ditto, dung trap (1♀, DEBU) ; Baeza , 24 km NE, 1300 m, carrion trap, 4–6 Mar 1976, S. Peck (1♂, 5♀, DEBU) ; Pichincha: 28 km E Alluriquin, Chiriboga Road , moss forest, 5200ʹ, carrion trap, 19–27 Jun 1975, Peck (32♂, 36♀, QCAZ, DEBU) ; 22.7 km E Tandapi , moss forest, 8000ʹ, dung trap, 24–29 Jun 1975, S. Peck (7♂, 3♀, QCAZ, DEBU) ; Zamora-Chinchipe: Res. Biol. San Francisco, Atajo trail, 03°58ʹ30ʺS, 079°4ʹ25ʺW, 2000 m, YPT, 25 Feb–3 Mar 2009, M. Pollet & A. De Braekeleer (1♂, UTPL) . PERU: Cusco: Wayqecha Biol. Stn., ~ 9 km NE Challabamba , 13°10ʹS, 071°35ʹW, cloud forest, leaf litter, ~ 2800 m, dung pans, 14–15 May 2007, Marshall & Kits (1♂, 2♀, DEBU) ; Wayqecha Biol. Stn., ~ 9 km NE Challabamba, 13°10ʹ20ʺS, 071°35ʹ00ʺW, Trecha Oso , 2600–2700 m, dung pans, 4 Dec 2011, S. A. Marshall (6♂, 7♀, MUSM, DEBU) ; ditto, pan traps, 5–7 Dec 2011 (1♀, DEBU) . VENEZUELA: Mérida: Tabay, La Mucuy, Truchicola trail, cloud forest, FIT, 17 Jun–3 Jul 1989, S. & J. Peck (1♂, DEBU) ; Táchira: 38 km NE San Cristóbal, 7000ʹ, carrion, 18–20 Jun 1974, S. Peck (3♂, 1♀, MIZA, DEBU) ; Trujilo: Guaramacal Natl. Pk. , 2000– 3000 m, car net, 26 Aug–1 Sep 1992, L. Masner (1♂, DEBU) ; Guaramacal Natl. Pk., 14 km NE Boconó , 2000 m, 25 Aug–1 Sep 1992, L. Masner (1♂, DEBU) ; Guaramacal Natl. Pk. , 2000 m, 26 Aug–1 Sep 1992, L. Masner (1♂, DEBU) .

Etymology: This name refers to the cone-shaped subanal plate (Latin ‘coniculus’: cone-like, conical; Latin ‘clunis’: buttocks, rump).

Comments: B. coniclunis is a high-elevation, Andean species, ranging from Venezuela to Bolivia. Males can be easily recognized by the conical subanal plate.