Pseudopterogramma deemingi ( Richards, 1973 ), 2025

Kuwahara, Gregory K., Marshall, Stephen A. & Luk, Stephen P. L., 2025, A revision of Parapterogramma Papp and Pseudopterogramma Papp, with a review of the Parapterogramma genus group of the Pacific and Indomalayan regions (Diptera, Sphaeroceridae, Limosininae), European Journal of Taxonomy 998, pp. 1-124 : 90

Pseudopterogramma deemingi ( Richards, 1973) comb. nov.

Fig. 69

Leptocera (Pterogramma) deemingi Richards, 1973: 367 .

Pterogramma deemingi – Marshall 1989: 606. — Roháček et al. 2001: 213.

Type material

Holotype

PAPUA NEW GUINEA • ♂; Mafulu ; 1219 m a.s.l.; Jan. 1934; L.E. Cheesman leg.; BMNH.

Paratypes

PAPUA NEW GUINEA • 3 ♂♂, 2 ♀♀; same collection data as for holotype; BMNH. One of the males is labelled as “on fungus” .

Material examined

The type series was examined by SAM in the Natural History Museum in 1989.

Redescription

BODY. Length 1.3–1.5 mm. Head reddish-brown, darkened posteriorly. Thorax dark brown with pale pleural sutures. Ventral surface of male mid tibia with two rows of stout setae along apical quarter; mid femur with one short corresponding row of proximoventral setae; female mid tibia with a large apicoventral bristle. Hind tibia with only fine dorsal setulae. Wing infuscate with pale base and wide, pale vertical band just beyond R 2+3. R 2+3 strongly curved forwards.

MALE ABDOMEN. Preabdomen dark brown. Epandrium wedge-shaped; cercus slightly enlarged; hypandrium curved upwards. Surstylus long and low, projecting anteroventrally as a long, thin lobe with three ventral setae. Postgonite long, tapered and curved forwards. Distiphallus large, with a long, apically bifurcated ventral sclerite supporting two large membranous dorsoapical flaps. Other characters not described or illustrated.

FEMALE ABDOMEN. Cerci apparently similar to those of Ps. conicum . Other characters not described.

Distribution

Australasian/Oceanian: Papua New Guinea.

Remarks

The above redescription of Ps. deemingi is based on Richards (1973), supplemented by SAM’s examination of the type series in 1989. This species certainly belongs in the genus Pseudopterogramma , as it has all characters noted in the diagnosis above, as well as male genitalia that are similar to those of other species of Pseudopterogramma , with bilobed, slightly V-shaped surstylus, long, curved postgonite, and large, membranous distiphallus with a long ventral sclerite. Illustrations of the male genitalia are not provided here as those in Richards (1973) are adequate.

Figures

Fig. 69. Distribution map of Pseudopterogramma Papp, 2008.