Hormopeza, Zetterstedt, 1838

Wahlberg, Emma, 2019, Revision and morphological analysis of the Ragadidae (Insecta, Diptera), European Journal of Taxonomy 521, pp. 1-19 : 10

Subfamily Ragadinae Sinclair, 2016

Figs 2 A–C, 3 , 4 A, 9 A–D

Diagnosis

The species of the subfamily Ragadidae are distinguished from those of the Iteaphilinae by the length of the postpedicel and the shape of tergite 8 in males (see the description below and the key above for details). The stout and spine-like setae on fore coxa are synapomorphies for this group. Its included species can be further distinguished by the presence of a recurved labrum in both males and females (in the Iteaphilinae, the labrum is recurved only in the females of Hormopeza ).

Type genus

Ragas Walker, 1837 .

Description

Postpedicel always at most two and a half times as long as broad ( Fig. 6A ). Labrum recurved in both males and females ( Fig. 6D ). Anterior of fore coxa with stout, spine like setae ( Fig. 6A ). Males: tergite 8 slender in shape ( Fig. 6F ); ventral surstylus distinguishable ( Fig. 6G ).

Comments

The first formal description of this group included the genera Dipsomyia , Hormopeza , Hydropeza , Ragas , and Zanclotus ( Sinclair 2016) . In the analysis herein, it is found that this subfamily, excluding Hormopeza , can be distinguished only by a few diagnostic characters.

Included genera

Ragas Walker, 1837 .

Dipsomyia Bezzi, 1909 .

Hydropeza Sinclair, 1999 .

Zanclotus Wilder, 1982 .

Figures

Fig. 2. Habitus, lateral view. A. Ragas unica Walker, 1837, ♀, lectotype (UZIL 2629:1; photo courtesy of Rune Bygebjerg, UZIL). B. Ragas unica, 1 ♀ (NHRS). C. Dipsomyia spinifera Bezzi, 1909, ♀, holotype (MTD).

Fig. 3. Hydropeza longipennae (Miller, 1923), ♀, holotype, habitus, lateral view (NZAC 04021412).

Fig. 4. Habitus, lateral view. A. Zanclotus dioktes Wilder, 1982, ♂, holotype (USNM). B. Iteaphila macquarti Zetterstedt, 1838, ♀, holotype (MZLU 3028:1). C. Anthepiscopus oedalinus (Zetterstedt, 1838), ♂ (NHRS-GULI000058764).

Fig. 9. Right wing. A. Ragas unica Walker, 1837, drawing with terminology on characters (left) and photo (right) (NHRS). B. Dipsomyia spinifera Bezzi, 1909 (MTD). C. Hydropeza longipennae (Miller, 1923) (dark colour is from underlying board to which the wing is glued) (NZAC 04021412). D. Zanclotus dioktes Wilder, 1982 (USNM). E. Iteaphila macquarti Zetterstedt, 1838 (NHRS). F. Anthepiscopus oedalinus (Zetterstedt, 1838) (NHRS-GULI000058764). G. Hormopeza obliterata Zetterstedt, 1838 (NHRS-000061621).

Fig. 6. Habitus, lateral view. A. Ragas unica Walker, 1837, head and fore leg (NHRS). B. Iteaphila macquarti Zetterstedt, 1838, antenna (NHRS). C. Iteaphila macquarti, head and fore leg (NHRS). D. Ragas unica, mouthparts (NHRS). E. Iteaphila macquarti, mouthparts (NHRS). F. Ragas unica, 1 ♂, genitalia, lateral (NHRS). G. Ragas unica, 1 ♂, right epandrial lobe, dorsal (NHRS). H. Iteaphila macquarti, 1 ♂, genitalia, lateral (NHRS).