Cheilosia procera, Barkalov & Ståhls, 2022

Barkalov, Anatolij V. & Ståhls, Gunilla, 2022, Cheilosia (Diptera, Syrphidae: Rhingiini) of Nepal with descriptions of 29 new species, European Journal of Taxonomy 829 (1), pp. 1-127 : 97-101

Cheilosia procera sp. nov.

urn:lsid:zoobank.org:act:F166A6F1-1804-463A-9111-73A6A332BC27

Figs 54–55

Differential diagnosis

Cheilosia (Eucartosyrphus) procera sp. nov. shares the following characters with other species of the subgenus: eye bare, antennal pits confluent, scutum with long, black bristles and the structure of the male genitalia. Cheilosia procera sp. nov. is the only species of subgenus Eucartosyrphus known from Nepal.

Etymology

The specific epithet is from the Latin ‘ procerus ʼ, meaning ‘longʼ, referring to the habitus of the species.

Material examined

Holotype NEPAL • ♂; Maharigaon Nördl .; 29°20′24″ N, 82°23′21″ E; 3400 m a.s.l.; 20 Jun. 1997; Creutzburg leg.;“Weissschale”; IBSJW / NME.

Paratypes NEPAL • 1 ♂; Maharigaon , nördl; 29°21′30″ N, 82°23′46″ E; 3700 m a.s.l.; 16 Jun. 1997; Creutzburg leg.; IBSJW / NME • 2 ♂♂; same label data as for holotype; IBSJW / NME • 1 ♂; Umg. Dillichaur [surroundings of Dillichaur], Jumla ; 2500 m a.s.l.; 2 Aug. 1997; Creutzburg leg.; IBSJW / NME • 6 ♂♂; Prov. Karnali, Umg. Mahariagon [surroundings of Mahariagon]; 29°20′ N, 82°23′ E; 2800–3200 m a.s.l.; 21 Jun. 1997; J. Weipert leg.; “KF”; IBSJW / NME • 3 ♂♂; Maharigaon , nördl.; 29°20′24″ N, 82°23′21″ E; 3400 m a.s.l.; 20 Jun. 1997; Creutzburg leg.; on Euphorbia spec. ; IBSJW / NME • 2 ♂♂; Prov. Karnali, 20 km NW of Simikot, Sol-Khola-Ufer ; 30°02′2″ N, 81°39′0″ E; 2900 m a.s.l.; 22 Jun. 2001; J. Weipert leg.; IBSJW / NME • 1 ♀; Prov. Seti, Ghatganga Khola NE Shima bis nahe Panshera; 29°46′48″ N, 81°25′47″ E; 2300– 2900 m a.s.l.; 20 Jun. 2009; J. Weipert leg.; IBSJW / NME • 1 ♂; Khumbu, Khumdzung ; 3900 m a.s.l.; 11 Jul. 1962; G. Eber and H. Falkner leg.; “Staatsslg. München”; “[ Cheilosia sp. indet. m#. (prob. new sp.) det. R. L. Coe, 1963]”; ZSMC • 2 ♀♀; same label data as for preceding; ZSMC .

Description

Male

LENGTH. Body 7.1–8.3 mm, wing 7.4–7.7 mm.

HEAD. Face comparatively narrow, black, shiny, except facial tubercle fine grey pollinose, non-pilose; facial tubercle very broad and bulging, occupying face between parafacia; parafacia narrow and up to about ⅓ of width of basoflagellomere, densely silvery pollinose and short white pilose; gena narrow, grey pollinose and white pilose; lower part of occiput densely silvery pollinose and white pilose. Frons slightly inflated, black, with narrow stripes of grey pollinosity near eyes, covered with long black pilosity; angle of approximation of eyes acute. Lunule dark-brown, antennal pits confluent. Antennae black, basoflagellomere elongated, grey pollinose, with reddish spot postero-ventrally; arista long, in basal half with distinct pilosity, length of longest pilosity of about width of arista in its widest part. Vertex slightly inflated, ocellar triangle isosceles, black pilose. Eye bare, length of eye contiguity distinctly longer than length of frons without lunule.

THORAX. Postpronotum black, brown pollinose and black pilose. Scutum and scutellum black, with brown pollinosity on scutum forming three more or less clear stripes medially from anterior margin up to midscutum, hind part of scutum shining with very slight pollinosity and narrow area anterior to scutellum with pollinosity; with comparatively long black pilosity, postalar calli with a few very long black bristles; scutellum slightly pollinose anteriorly, with shorter yellow and longer black pilosity, scutellum hind margin with many strong, long, black bristles, longest bristles longer than length of scutellum; subscutellar fringe long, white. Pleura black, shiny with fine but dense grey-brown pollinosity, without shiny non-pollinose spots; mixed black and yellow pilose; katepisternum predominantly yellow pilose, dorsal pile patch large and narrowly separated from smaller ventral pile patch; anepimeron black pilose; metasternum yellow pilose.

LEGS. Fore coxa dark brownish, grey pollinose and yellow pilose, mid and hind coxa dark-brown to black, pilosity black and white; femora black with yellow extreme tips, long pilosity on anterior surface black and yellowish; tibiae yellow in basal third and narrowly yellow apically, black otherwise; with long black pilosity anteriorly slightly longer than width of tibia; tarsi black dorsally, only mid basitarsus basally narrowly yellow.

WING. Narrow, translucent, completely covered with microtrichia; inner angle between veins M 1 and R 4+5 acute, Rs with some black short pile. Calypter white with yellow rim and pilosity; haltere yellow with brownish-yellow knob.

ABDOMEN. Narrow, in broadest part narrower than scutum at level of wing base, black with brownish pollinosity, with long, erect yellow pilosity on lateral parts of tergites I–IV which is longer on tergites I–II and shorter on tergites III–IV, and short, semi-appressed, black and white pilosity on medial parts of all tergites, sometimes with a few long black pile on anterior and posterior angles of tergite II. Sternites grey pollinose, long yellow pilose on sternites I–II, sternites III–IV with long yellow pilosity laterally and short adpressed black pilosity medially, black pilosity postero-medially longer.

Female

LENGTH. Body 6.8–8.0 mm, wing 6.6–7.8 mm.

HEAD. Basoflagellomere in one specimen as in male, in other specimens of slightly shorter length. Frons almost parallel-sided, comparatively narrow, lateral furrows almost invisible, with grey pollinose stripe near eye; with black pilosity which is anteriorly directed. Ocellar triangle isosceles. Upper part of occiput broader than in male, shiny, without pollinosity.

THORAX. Scutum black, shiny with grey pollinosity laterally and medially shiny without pollinosity; covered with short appressed black and yellow pilosity, some short erect black pilosity on hind half; postalar callus and scutellum hind margin with long, strong, black bristles.

ABDOMEN. In broadest part approximately equal to width of scutum at level of wing base; black, brown pollinose, with bluish shiny reflections on parts without pollinosity. Otherwise as male.

Distribution

Nepal.

Figures

Fig. 54. Cheilosia (Eucartosyrphus) procera sp. nov.; A–D, G–J = paratype, ♂ (IBSJW/NME), E–F = paratype, ♀ (IBSJW/NME). A. Head, lateral view. B, E. Head, dorsal view. C, F. Antenna, lateral view of pedicel and basoflagellomere. D. Tip of wing. G, I. Superior lobes of hypandrium, lateral view. H. Aedeagus and aedeagal apodeme, lateral view. J. Surstylus and gonocercus, lateral view. Scale bars indicated in drawings.

Fig. 55. Cheilosia (Eucartosyrphus) procera sp. nov.A–B. Holotype, ♂ (IBSJW/NME); dorsal and lateral views. C–D. Paratype, ♂ (IBSJW/NME); dorsal and lateral views. E–F. Paratype, ♀ (IBSJW/NME), dorsal and lateral views. Photo: Pekka Malinen, FMNH Luomus. Scale bars = 1 mm.