Pseudopterogramma annectens ( Richards, 1964 )

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 : 78-79

Pseudopterogramma annectens ( Richards, 1964)

Figs 46–47 , 68B , 69

Leptocera (Pterogramma) annectens Richards, 1964: 609 .

Pterogramma annectens – Marshall 1989: 606. — Roháček et al. 2001: 212.

Pseudopterogramma annectens – Marshall et al. 2011: 264.

Type material

Holotype

INDONESIA – Papua • ♂; Biak Island ; 25 Apr. 1945; G.E. Bohart leg.; CAS.

Paratypes

INDONESIA – Papua • 8 ♂♂, 3 ♀♀; same collection data as for holotype; CAS .

SOLOMON ISLANDS • 1 ♂; Russell Islands , Pavuvu; 20 Apr. 1945; G.E. Bohart leg.; CAS .

Material examined

INDONESIA • 4 ♂♂, paratypes; Biak Island ; CAS

SOLOMON ISLANDS • 1 ♂, paratype; CAS .

Redescription

BODY ( Fig. 46 ). Length 1.1–1.4 mm. Head yellow-orange, frontal vitta and orbital plates paler. Interfrontal bristles in three pairs. Thorax brown with a pale lateral spot, shiny despite microtomentum. Anterior dorsocentral bristles separated by 7–8 rows of acrostichal setulae. Ventral surface of male mid tibia with two rows of stout setae along apical two-thirds; mid femur with two corresponding rows of proximoventral setae; female mid tibia with a large apicoventral bristle. Hind tibia with only fine dorsal setulae. Wing ( Fig. 68B ) hyaline, without spots. R

2+3

sinuate, curves symmetrical.

MALE ABDOMEN ( Fig. 47 ). S5 simple, right side 1.5× longer and 1.5 × wider than left, sparsely setose, and posteromedially emarginate, flanked on either side by a stout, tooth-like seta. S6 long and thin, anterolateral corner slightly produced. Epandrium subquadrate and uniformly setose; cercus large, shield-like and flattened with several setae. Surstylus large, elongate, and bilobed: anterior/dorsal lobe small, narrow, with three long apical setae and two long laterobasal setae, posterior/ventral lobe much larger, strongly sinuate and flattened laterally, with a row of thick, preapical, outer setae and a patch of tooth-like, medial, inner setae, apical third strongly tapered and pointed. Postgonite elongate, slender, strongly sinuate, and tapered, apex with a slight upper ridge. Phallapodeme long, apical third tapered and bent; basiphallus tall, 2.3× as tall as long in lateral view, tubular, gently curved, and slightly tapered. Distiphallus large, elongate (5.7 × as long as tall), basal half heavily sclerotized and split into a shorter upper and longer lower lobe, both emarginate apically, apical half largely membranous and supported by a thin, M-shaped upper sclerite.

FEMALE ABDOMEN. We have not seen female specimens, but Richards (1964) describes a yellowish cercus with several long setae including a short, stout, dorsal seta.

Distribution

Australasian/Oceanian: Indonesia (Biak Is.) ( Richards 1964), Solomon Islands (Russell Is.) ( Richards 1964).

Remarks

Pseudopterogramma annectens ( Richards, 1964) is externally similar to Ps. kasut sp. nov., which also has largely hyaline wings and three pairs of weak interfrontal bristles. Pseudopterogramma annectens can be readily distinguished from Ps. kasut by the tubular M 4 beyond dm-m, the male mid tibia with a double row of stout apicoventral setae, and the male genitalia.

Figures

Fig. 46. Pseudopterogramma annectens (Richards, 1964) (CAS). A. Male habitus, lateral view. B. Male head, anterodorsal view. Scale bars: A = 0.50 mm; B = 0.25 mm.

Fig. 47. Pseudopterogramma annectens (Richards, 1964) (CAS). A. Aedeagus and associated structures, lateral view. B. Male terminalia, lateral view. C. Male S5-8, ventral view. Scale bars: A–C = 0.10 mm.

Fig. 68. Pseudopterogramma Papp, 2008, left wings, ventral views. A. Ps. aestivale (Richards, 1973) (QMBA). B. Ps. annectens (Richards, 1964) (CAS). C. Ps. brevivenosum (Tenorio, 1967) (DEBU). D. Ps. conicum (Richards, 1946) (DEBU). E. Ps. fenestrata (Richards, 1973) (QMBA). F. Ps. fijiensis sp. nov., paratype (BPBM). G. Ps. kasut sp. nov., paratype (DEBU). H. Ps. ketambensis sp. nov., paratype (ROME). I. Ps. metatarsalis (Papp, 2008) (LKCNMH). J. Ps. siamense Papp, 2008 (ROME). Scale bars: A–J = 0.50 mm.

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