Lygistorrhina (Probolaeus) urichi Edwards, 1912

Blagoderov, Vladimir & Pollet, Marc, 2020, Diversity of Lygistorrhina (Probolaeus) Williston, 1896 (Diptera: Keroplatidae, Lygistorrhininae) of Mitaraka (French Guiana), with descriptions of three new species, Zoosystema 42 (30), pp. 593-606 : 600-603

Lygistorrhina (Probolaeus) urichi Edwards, 1912

( Figs 6 , 7 )

Lygistorrhina urichi Edwards, 1912: 204 .

REMARK

The species was described by F. W. Edwards based on a series of 8 specimens (7 males and one female), collected by H. Scott (Cambridge, UK). While the original paper specifies that the type was presented to the British Museum (now Natural History Museum, NHMUK, London), one male and one female specimen were located in this collection. Five male specimens were deposited in the collection of the Museum of Zoology, Cambridge University ( UK). Edwards did not specify the gender of the type specimens deposited in the NHMUK, so the entire type series should be considered as syntypes. Discovery of additional syntypes allows us to emend Edward’s description (only additional or misinterpreted characters being mentioned).

MATERIAL EXAMINED. — Syntypes. Trinidad • 1♂; Diego Martin ; 22.III.1912; H. Scott, herbage by stream; BMNH(E)254352 ; NHMUK • 1 ♀; III.1912, H. Scott; BMNH(E)254351; NHMUK • 2 ♂; III.1912, H. Scott; CUMZ .

EMENDED DESCRIPTION

Male

Head. Scape and pedicel brown, flagellum uniformly pale, as long as thorax; flagellomeres as long as wide or slightly shorter, each with a few irregular dark dorsal setae. Median ocellus round, ½× the diameter of the lateral ocelli, latter semi-circular.

Thorax. Thorax and coxae uniformly dark brown. Antepronotum with three setae, proepisternum with six setae.Laterotergite with 18-19 setae, and mediotergite with 6-8 setae; laterotergite, metepisternum and hind coxa subequal in size. Mesonotum irregularly setose except for posterior 1/3, latter with indistinct dorsocentral rows of setae.

Wing. M 1 straight; M 2 and M 3+4 curved and converging; M 3+4 slightly and CuA conspicuously sinuous.

Abdomen. Tergite 1 of some specimens completely dark, but sternite 1 always with pale transversal posterior band.

Terminalia ( Fig. 7). Male genitalia narrower than in other species. Tergite 9 oval, almost parallel-sided, 1.5× as long as wide. Gonostyli appearing laterally flattened, slightly wider at apex; apical tooth scoop-shaped, with very dense patch of setae apico-medially. Aedeagus wider than long, bell-shaped, with flat apex; aedeagal apodeme long, curved; gonocoxal apodeme heavily sclerotised.

Figures

FIG. 6. — Lygistorrhina (Probolaeus) urichi Edwards, 1912, syntype male: A, habitus; B, wing; C, head; D, thorax, dorsal view. Scale bars: A, 1 mm; B, 0.5 mm; C, 0.1 mm; D, 0.2 mm.

FIG. 7. — Lygistorrhina (Probolaeus) urichi Edwards, 1912, syntype male: A-C, genitalia; D, aedeagal complex; A, B, dorsal view; C, D, ventral view. Scale bars: A, 1 mm; B, C, 50 µm; D, 20 µm.