Phytoliriomyza jurgensi Spencer, 1983

Phytoliriomyza jurgensi Spencer, 1983 View in CoL

( Fig. 18 View FIG )

Phytoliriomyza jurgensi Spencer, 1983: 63 View in CoL . — Martinez & Étienne 2002: 20. — Étienne & Martinez 2003a: 261; b: 95.

MATERIAL EXAMINED. — Guyane • 1 ♂, 1 ♀; Mitaraka , sampling site: MIT-E-savane roche 2; 02°13’59.8”N, 54°27’46.5”W; 471 m; open/partially opened areas; 13-20.VIII.2015; MT (6 m); Pierre-Henri Dalens leg.; sample code: MITARAKA/230 , sorted by M. Pollet; MNHN GoogleMaps .

DIAGNOSIS. — This species can be recognized by its small size (1.2-1.4 mm), yellow frons, yellow anepisternum and notopleuron, sparse acrostichal setulae in two rows, and a first flagellomere with long pubescence.

DISTRIBUTION. — Costa Rica, Guadeloupe, St-Christopher, French Guiana (new record).

HOST. — Unknown.

REMARKS

According to the original description ( Spencer 1983), P. jurgensi has the first flagellomere and palpus black, and the tibiae and tarsi brownish black. In contrast to this, the Mitaraka specimens are paler, with the first flagellomere and palp yellowish brown in the male and brown in the female, and the tibiae and tarsi dark yellow. The Mitaraka specimens are also slightly smaller with a wing length of 1.2 mm in the male and 1.4 mm in the female (1.4 mm in male in original description) and they have 3 +2 dc ( Fig. 18B View FIG ) (3 +1 dc in original description). Externally, P. jurgensi is most similar to P. scotica Spencer, 1962 (Neotropical records are available under P. pilosella Spencer, 1973 now recognized as a junior synonym of P. scotica (synonymy by von Tschirnhaus 2023)). However, P. jurgensi can be distinguished from P. scotica by a yellow frons (part of frons slightly darker in P. scotica ), a brown or black palpus (yellow in P. scotica ), and a yellowish to greyish scutellum (brown in P. scotica ). Both species have extremely small and weakly sclerotized genitalia, but the distiphallus of P. jurgensi has a cup-shaped or funnel-shaped distal end ( Fig. 18C View FIG ) and the tubules have a darker and more sclerotized medial section ( Fig. 18D View FIG ). In P. scotica , the phallus has one pair of very long, coiled tubules.