Serichlamys melamitis 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.15732560
persistent identifier	https://treatment.plazi.org/id/0B298859-3316-5805-8354-41586D335C25
treatment provided by	ZooKeys by Pensoft
scientific name	Serichlamys melamitis Reemer
status	sp. nov.

Treatment

Serichlamys melamitis Reemer sp. nov.

Figs 13 View Figures 13–17 , 18 View Figures 18–23 , 69–75 View Figures 69–75 , 142 View Figures 142–145

Type material.

Holotype. Brazil • 1 ♂, holotype of Serichlamys melamitis sp. nov.; Salesópolis , Estação Biológica de Boraceia; 850 m asl; 5 Aug. 1964; Rabello leg.; MZUSP. Label 1: “ EST. BIOL. BORACEIA // Salesópolis, S. P. 850 m. // Rebello col. 5. VIII. 1964 ”; label 2: “ Serichlamys sp. // Det. M. Reemer 2024 // Specimen code MR 1594 ” . Paratypes. Brazil • 3 ♂ 1 ♀ of same locality and date as holotype, 2 ♂ (M. Reemer specimen codes MR 1591 and MR 1593 ) and 1 ♀ in MZUSP, 1 ♂ in RMNH (M. Reemer specimen code MR 1592 ) .

Description

(based on holotype). Adult male Body size: 8 mm.

Head. Face occupying ~ 1 / 3 of head width in frontal view; shiny black; white setulose, except black setulose on dorsal 1 / 4. Gena very narrow; black; white setulose. Oral margin laterally not produced. Frons black; medially bare, laterally black setulose. Vertex black; black setulose on anterior half, except for a few golden yellow setulae anteriorly, golden yellow setulose on posterior half. Occiput black; dorsal 1 / 2 golden yellow setulose, ventral 1 / 2 white setulose. Eye bare. Antenna orange-brown, except apical 1 / 3 of postpedicel black; antennal ratio ~ 2.5: 1: 4.5.

Thorax. Scutum shiny black with faint metallic sheen; golden yellow setulose. Postpronotum of same colour as scutum; golden yellow setulose. Postalar callus pale brown; yellow setulose. Scutellum trapezoid, of same colour as scutum, with two pale yellow calcars as long as ~ 1 / 2 of scutellar length. Pleura shiny brown, except meron and ventral parts of katepisternum blackish. Anepisternum with shallow sulcus; golden yellow setulose anterodorsally and posterodorsally, widely bare medially and ventrally. Anepimeron golden yellow setulose. Katepisternum with patch of white setulae dorsally and a few white setulae ventrally. Katatergite long microtrichose, anatergite short microtrichose. Calypter and halter pale yellow.

Wing: hyaline; microtrichose, except bare on basal 1 / 4 of cell r 1 (along vein RS), most of cell br (only microtrichose along vena spuria), posterobasal 2 / 5 of cell bm, anterobasal 2 / 5 of cell cup, and basomedian 1 / 2 of alula.

Legs: femora blackish brown, with apices narrowly yellowish; yellowish setulose except black setulose anterodorsally. Tibiae dark brown with vaguely demarcated black rings; yellowish setulose. Fore tarsus yellow setulose, mid tarsus yellow setulose except apical tarsomeres dorsally black setulose, hind tarsus black setulose dorsally and yellow setulose ventrally. Coxae and trochanters blackish brown; yellowish white setulose.

Abdomen. Tergites black, except lateral margins and posterior margin of tergite 4 brown. Tergite 1 yellowish white setulose. Tergite 2 golden yellow setulose; strongly shiny medially, semi-shiny on lateral 1 / 4 due to microsculpture. Tergite 3 semi-shiny on most of surface, with small round maculae laterally and a smaller dull macula medially; golden yellow setulose except black setulose medially. Tergite 4 semi-shiny; golden yellow setulose laterally and posteriorly, black setulose anteriorly and medially. Sternites brown; white setulose. Genitalia as in Fig. 142 View Figures 142–145 .

Female. As male, except for following differences. Body length 11 mm. Scutellum yellow, strongly contrasting with scutum (Fig. 74 View Figures 69–75 ). Tergites with lateral margins widely yellowish. Tergite 5 largely yellowish (Fig. 75 View Figures 69–75 ). Legs pale brown, except tarsi dark brown.

Diagnosis.

Body length: male 8–8.5 mm (n = 4), female 11 mm (n = 1). Together with S. mellimitis Reemer , sp. nov. and S. mitis , this species combines a black face with antennae in which the postpedicel has a dark tip (Figs 71 View Figures 69–75 , 72 View Figures 69–75 ). This species differs from the other two by its entirely dark tarsi (Fig. 18 View Figures 18–23 ), and the absence of a median projection on the ventral lobe of the surstylus (Fig. 142 View Figures 142–145 ). In the female, the scutellum is yellow, contrasting strongly with the dark scutum (Fig. 74 View Figures 69–75 ).

Etymology.

The species name refers to the species Serichlamys mitis (Curran) , to which this new species is very similar. The prefix mela (from the Greek melas, black) was chosen because this species is more blackish in colouration than S. mitis .

Distribution.

This species is only known from Salésopolis in the Brazilian State of São Paulo.