Serichlamys xanthocnemia Reemer, 2025

Reemer, Menno & Mengual, Ximo, 2025, Revision of the Neotropical species of the hoverfly genus Serichlamys Curran, 1925 (Diptera, Syrphidae, Microdontinae), ZooKeys 1243, pp. 51-106 : 51-106

publication ID	https://doi.org/10.3897/zookeys.1243.132809
publication LSID	lsid:zoobank.org:pub:494DA692-E7B5-455B-82B0-390DE5924743
DOI	https://doi.org/10.5281/zenodo.15733469
persistent identifier	https://treatment.plazi.org/id/FA373097-7E96-5080-A27F-EC03D05F5E69
treatment provided by	ZooKeys by Pensoft
scientific name	Serichlamys xanthocnemia Reemer
status	sp. nov.

Treatment

Serichlamys xanthocnemia Reemer sp. nov.

Figs 38 View Figures 36–43 , 131–137 View Figures 131–137 , 154 View Figures 150–154

Type material.

Holotype. Brazil • 1 ♂, holotype of Serichlamys xanthocnemia sp. nov.; São Paulo, Peruibe ; 4 Aug. 1993; O. Niehuis leg.; RMNH.

Description

(based on holotype). Adult male Body size: 7 mm.

Head. Face occupying ~ 1 / 3 of head width in frontal view; shiny yellowish brown; white setulose, except for bare median part. Gena yellow; white setulose. Oral margin laterally hardly produced. Frons dark brown; medially bare, laterally black setulose. Vertex brown; golden yellow setulose anteriorly and posteriorly, black setulose in between. Occiput blackish; white setulose. Eye bare. Antenna: scape and pedicel black, postpedicel dark brown; antennal ratio ~ 3.5: 1: 4.5.

Thorax. Scutum blackish with bronze sheen, margins brown; golden yellow setulose. Postpronotum and postalar callus brown; golden yellow setulose. Scutellum trapezoid, brown; black setulose medially, golden yellow setulose laterally and posteriorly; with two pale, acute, converging calcars as long as ~ 1 / 3 of scutellar length. Pleura blackish brown, except katepimeron and margins of some other pleurites yellowish brown. Anepisternum with shallow sulcus; yellowish white setulose anterodorsally and posterodorsally, widely bare medially and ventrally. Anepimeron yellowish white setulose. Katepisternum with patch of white setulae dorsally and a few white setulae ventrally. Katatergite long microtrichose, anatergite short microtrichose. Calypter and halter yellowish white.

Wing: hyaline; microtrichose, except bare on basal 2 / 3 of cell br (and microtrichose along vena spuria), basal 1 / 3 of cell bm, and anterobasal 1 / 10 of cup.

Legs: yellow, except basal 1 / 2 of fore femur and basal 2 / 3 of mid and hind femora black; pale yellow setulose, except femora largely black setulose. Coxae and trochanters blackish brown; yellow to white setulose.

Abdomen. Tergites blackish, except lateral margins brown (brown parts widening towards apex of abdomen). Tergite 1 white setulose. Tergite 2 white setulose. Tergite 3 dull on most of surface, with lateral and posterior margins shiny; black setulose on dull parts, white setulose on shiny parts. Tergite 4 shiny; yellowish setulose laterally and posteriorly, black setulose anteriorly and medially. Sternites yellowish brown; yellowish setulose with some black setulae on sternite 4. Genitalia as in Fig. 154 View Figures 150–154 .

Female. Unknown.

Diagnosis.

Body length: male 7 mm (n = 1). This is the only known species of Serichlamys which combines a yellow face, femora which are 2 / 3 black, and yellow tibiae and tarsi. Male genitalia as in Fig. 154 View Figures 150–154 . Female unknown.

Etymology.

The species name is derived from the Greek words xanthos (yellow) and kneme (tibia). This name was chosen because of the yellow tibiae of this species.

Distribution.

This species is only known from the Brazilian state São Paulo.