Pseudopterogramma insulare ( Papp, 1972 )

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 : 100-101

Pseudopterogramma insulare ( Papp, 1972)

Fig. 69

Pterogramma insularis Papp, 1972: 101 .

Pterogramma insulare – Marshall 1989: 506. — Roháček et al. 2001: 213.

Pseudopterogramma insularis – Papp 2008: 102.

Pseudopterogramma insulare – Marshall et al. 2011: 265.

Type material

Holotype

PAPUA NEW GUINEA • ♀; Lae , along Lae-Bulolo road, beyond bridge of Markham River; 6 Sep. 1968; J. Balogh leg.; about 25 m above flood area, decaying wood of fallen trunk in forest; HNHM.

Material examined

Holotype photo provided by Petra Szöllősi-Tóth, HNHM.

Redescription

BODY. Length 1.0– 1.2 mm. Interfrontal bristles in four pairs. Thorax brownish-yellow, likely darker when alive. Anterior dorsocentral bristles separated by 5–6 rows of acrostichal setulae. Ventral surface of male mid tibia with two rows of stout setae along apical quarter; mid femur with two corresponding rows of proximoventral setae; female mid tibia with a large apicoventral bristle. Hind tibia with a long but fine dorsal preapical seta (length equal to first hind tarsomere) and a stout preapical ventral spur. Wing pale with several darker spots forming a tessellated pattern. R 2+3 sinuate, apical curve much stronger than basal curve.

MALE ABDOMEN. Sternite 5 broad, sparsely setose with a broad posteromedial emargination. Surstylus bilobed, anterior lobe smaller and triangular, posterior lobe larger and rectangular, both lobes with several longer ventral setae. Postgonite long, slightly sinuate and tapered but apex blunt. Phallapodeme long, curved apically and with a broad dorsomedial ‘fin’; basiphallus large, angled and frame-like; distiphallus stout, with a pair (?) of long ventrolateral sclerites and a sinuate dorsal sclerite connected by desclerotized sections.

FEMALE ABDOMEN. Cercus with three sinuate setae (one apical, one subapical, one dorsomedial). No other characters are described, though they are likely to be similar to those of Ps. siamense .

Distribution

Australasian/Oceanian: Papua New Guinea ( Papp 1972); Indomalayan: Indonesia ( Papp 2008).

Remarks

The above redescription of Ps. insulare is based on Papp’s (1972, 2008) descriptions of the species. Papp’s (2008) illustrations and description of the male genitalia of Ps. insulare (based on an Indonesian specimen) seem identical to those of Ps. siamense , suggesting that the latter species may be a synonym of the former. However, the male specimen of Ps. insulare that Papp described and illustrated in 2008 was collected in North Sulawesi, Indonesia, far from the type locality of Ps. insulare in Papua New Guinea and well within the range of the much more widely distributed Ps. siamense . This suggests that this male actually does belong to Ps. siamense , which would mean that either these two species are synonyms or the Indonesian male is not conspecific with the holotype of Ps. insulare as Papp (2008) claimed. We suspect that they are synonyms but better material of Ps. siamense , including confidently associated males and females, is needed to be sure.

Figures

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