Bromeloecia pinna 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 : 26

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Bromeloecia pinna Yau and Marshall

sp. n.

Bromeloecia pinna Yau and Marshall sp. n.

(Figs. 4.1–4.14)

Description: Body length 1.4–1.8 mm (males), 1.8–2.1 mm (females). Generally similar to B. abundantia , except the colour contrast between the yellowish gena and the dark brown thorax is more pronounced.

Wing: Distance between radial fork and r-m 4.5x length of r-m; dm-cu 1.5x length of r-m and distance between crossveins 2.5x length of dm-cu.

Male abdomen and terminalia: S5 with a pair of posteromedial lobes, lobes posteroventrally with medially directed spicules; a row of strong setae; row longer than width of modified posteromedial part of sclerite. Cercus flat, wide, flipper-like. Distiphallus LFS sheet-like, apically long and rippled; FDS forming a posteriorly bent tongue; SDS weakly sclerotized, spatulate.

Female abdomen and terminalia: Each spermatheca with 1 hemispherical pit and 1 nozzle-like pit, both pits with scattered dimples.

Type specimens: Holotype: 1♂: ECUADOR: Napo: Baeza , 5 Mar 1979, S. A. Marshall ( QCAZ).

Paratypes: ECUADOR: Napo: 15 km NW Baeza , 2200 m, dung trap, 2–6 Mar 1976, S. Peck (9♂, 8♀, QCAZ, DEBU) ; 17 km NE Baeza , 1400 m, carrion trap, 3–6 Mar 1976, S. Peck ( QCAZ) ; 17 km NE Baeza , 1400 m, dung trap, 3–6 Mar 1976, S. Peck (5♂, 3♀, QCAZ, DEBU) ; same as holotype (1♂, 2♀, QCAZ, DEBU); Baeza , stone trail wet montane rainforest/pasture, 1550 m, Malaise trap, 15–19 May 1987, L. D. Coote & B. V. Brown (3♂, DEBU) ; Baeza , wet montane rainforest, 1500 m, Malaise trap, 16–19 May 1987, Coote & Brown (1♂, DEBU) ; Baeza , W along road, montane rainforest/pasture, 1500 m, Malaise trap, 16–19 May 1987, Coote & Brown (1♀, DEBU) ; Cosanga , 2.5 km W, 2150 m, dung/pans, 5–7 Nov 1999, S. A. Marshall (1♂, 1♀, DEBU) .

Etymology: This name refers to the flipper-like cerci (Latin ‘pinna’: fin, wing).

Comments: B. pinna is found at relatively high elevations in the Ecuadorian province of Napo, in Baeza and nearby areas of cloud forest on the eastern slopes of the Andes. This species is relatively large when compared to other Bromeloecia species, but not as large as B. magna . The male cercus of B. pinna is usually found extended laterally to different degrees, and is rarely flexed inwards.


Museo de Zoologia, Pontificia Universidad Catolica del Ecuador


Ontario Insect Collection, University of Guelph