Serichlamys boti 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.15732556
persistent identifier	https://treatment.plazi.org/id/9280DAEB-DBAA-5ECA-B5F8-CCCEDBAC3678
treatment provided by	ZooKeys by Pensoft
scientific name	Serichlamys boti Reemer
status	sp. nov.

Treatment

Serichlamys boti Reemer sp. nov.

Figs 24 View Figures 24–29 , 30 View Figures 30–35 , 58–63 View Figures 58–63 , 138 View Figures 138–141

Type material.

Holotype. Colombia • 1 ♂, holotype of Serichlamys boti sp. nov.; Risaralda, Tatamá National Park ; 1481 m; 5.239°N, 76.090°W; 4 Mar. 2015; S. Bot leg.; CEUA. GoogleMaps

Label 1: “ CO Risaralda // Tatamá NP, 1481 m // lat 5.239 lng - 76.090 // 4 III 2015 leg. S. Bot ”; label 2: “ Serichlamys sp. nov. // det. M. Reemer // specimen code MR 1485 ”. Paratypes . Colombia • 1 ♂; same locality and date as holotype; specimen code MR 0596 ; CEUA GoogleMaps . Ecuador • 4 ♂; Pinchincha , Nambillo Valley near Mindo; 1450 m; 26 Jun. 1987; M. Cooper leg.; NHMUK (barcodes on labels: NHMUK 013624730 About NHMUK , NHMUK 013624731 About NHMUK , NHMUK 013624732 About NHMUK , NHMUK 013624733 About NHMUK ) • 3 ♀; Pinchincha , Nambillo Valley near Mindo; 1450 m; one from 27 Jun. 1987 ( NHMUK 013624724 About NHMUK ), one from 28 Jun. 1987 ( NHMUK 013624726 About NHMUK ), one from 30 Jun. 1987 ( NHMUK 013624725 About NHMUK ); M. Cooper leg.; NHMUK .

Description

(based on holotype). Adult male Body size: 9.5 mm.

Head. Face occupying around 2 / 5 of head width in frontal view; shiny black; white setulose laterally, black setulose sublaterally, bare at median part as wide as ~ 1 / 4 of width of face. Gena very narrow; black; white setulose. Oral margin laterally not produced. Frons black; medially bare, laterally black setulose. Vertex black; black setulose. Occiput black; dorsal 1 / 2 black setulose, ventral 1 / 2 white setulose. Eye bare. Antenna black, except pedicel and basal 1 / 6 of postpedicel brown; antennal ratio ~ 7: 1: 7.5.

Thorax. Scutum shiny black, with bronze sheen on lateral 1 / 3 and faint dark blue sheen on median 1 / 3; black setulose, except for narrow fascia of golden yellow setulae along anterior margin. Postpronotum of same colour as scutum; black and dark yellow setulose. Postalar callus dark brown; black setulose. Scutellum trapezoid, with two calcars as long as ~ 1 / 3 of scutellar length; of same colour as scutum except calcars largely pale brown; black setulose anteriorly and medially, yellow setulose laterally and posteriorly. Pleura shiny blackish brown, except anepimeron and katepimeron pale brown. Anepisternum with shallow sulcus; dark yellow setulose anteriorly, black setulose posteriorly, widely bare medially and ventrally. Anepimeron black setulose anteriorly, dark yellow setulose posteriorly. Katepisternum with patch of pale yellow setulae dorsally and small patch of yellow setulae ventrally. Katatergite long microtrichose, anatergite short microtrichose. Calypter greyish yellow and halter pale yellow.

Wing: hyaline; microtrichose, except bare on basal 1 / 3 of cell r 1, a small basal patch of r 2 + 3, most of cell br (only microtrichose along vena spuria), most of cell bm except for narrow median strip of microtrichiae, large part of cell dm (Fig. 24 View Figures 24–29 ), anterobasal 1 / 2 of cell cup, and basomedian 3 / 4 of alula.

Legs: femora black, only apex brown; black setulose. Tibiae brown at both ends, blackish in between; largely black setulose, with some pale setulae ventrally. Tarsi orange-brown; black setulose dorsally, golden yellow setulose ventrally. Coxae and trochanters blackish; fore and mid coxae black setulose anteriorly, pale setulose posteriorly; hind coxa silvery white setulose.

Abdomen. Tergites black to blackish brown, slightly paler along lateral margins. Tergite 1 black setulose. Tergite 2 shiny, except for oval median dull macula and pair of smaller, oblique lateral maculae; black setulose, except yellow setulose in anterolateral corners, and white setulose along posterior margin. Tergite 3 dull, except for narrow shiny strips along lateral and posterior margins; black setulose, except narrowly white setulose along posterior margin. Tergite 4 shiny; black setulose, except white setulose in anterolateral corners and on pair of larger posterior patches. Sternites blackish; sternites 1–3 white, setulose, sternite 4 black setulose. Genitalia as in Fig. 138 View Figures 138–141 .

Female. Unknown.

Diagnosis.

Body length: male 9.5–10 mm (n = 2). Superficially, this species looks most similar to S. chloraspis Reemer , sp. nov., S. pallitarsis Reemer & Mengual , sp. nov., and S. varicaudata Reemer & Mengual , sp. nov., which are of similar size and colouration. These species also share the following combination of characters: face black, tibiae entirely brown, tergite 3 broadly dull with narrow shiny margins (Fig. 58 View Figures 58–63 ). Serichlamys boti Reemer , sp. nov. differs from the three other species, as well as from all other known species of Serichlamys , in the partly bare wing cell dm (Fig. 24 View Figures 24–29 ). It also differs from the three species mentioned above in the presence of only two basoventral setae on the surstylus (Fig. 138 View Figures 138–141 ) (instead of 4 or 5 in the other three species, Figs 139–141 View Figures 138–141 ). Serichlamys boti Reemer , sp. nov. is similar to S. pallitarsis Reemer & Mengual , sp. nov. in the pattern of dull maculae on tergite 2: dull maculae narrower than shiny areas separating them (wider than shiny areas in S. chloraspis Reemer , sp. nov. and S. varicaudata Reemer & Mengual , sp. nov.) (compare Figs 31 View Figures 30–35 , 33 View Figures 30–35 ). Serichlamys boti Reemer , sp. nov. and pallitarsis Reemer & Mengual , sp. nov. also share orange tarsi (dark in S. chloraspis Reemer , sp. nov. and S. varicaudata Reemer & Mengual , sp. nov.). However, the partly bare wing cell dm (entirely microtrichose in S. pallitarsis ) and the two basoventral setae on the surstylus (4 or 5 in S. pallitarsis Reemer & Mengual , sp. nov.) clearly separate this species.

The holotype and the paratype differ in the colour of the setulae on the scutum: black except for narrow fascia of golden yellow setulae along anterior margin in the holotype, entirely golden yellow in the paratype.

Etymology.

The name of this species is a patronym in honour of Sander Bot, who collected the holotype and one of the paratypes.

Distribution.

This species is known from two localities on the western slope of the Andes: one in Colombia (elevation 1481 m), and one locality in Ecuador (elevation 1450 m).