Merodon bombiformis Hull 1944
| Main Authors: | Vujić, Ante, Radenković, Snežana, Zorić, Ljiljana Šašić, Likov, Laura, Tot, Tamara, Veselić, Sanja, Djan, Mihajla |
|---|---|
| Format: | info publication-taxonomictreatment Journal |
| Terbitan: |
, 2021
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/5013390 |
Daftar Isi:
- Merodon bombiformis Hull, 1944 Figs 1, 3C, 4A, 5A, 6A, 9A, 10A, 11A, 12A, 13A–C, 14A, 15A, 16A, 21A–D, 24 Merodon bombiformis Hull, 1944: 42–43 (type locality: Waterval, Republic of South Africa). Diagnosis Large, golden species (10–14 mm) with reddish-yellow/golden face and frons (Figs 9A, 11A), lateral sides of scutum (Fig. 10A) and most of terga (Fig. 5A); oral margin reduced (Fig. 9A); antennal segments very short (Fig. 4A), frons inflated (Fig. 9A). Material examined Holotype REPUBLIC OF SOUTH AFRICA • 1 ♂; Waterval; 25.183° S, 29.012° E; 27 Dec. 1898; Distant Collection 1911:383; BMNH. Additional material REPUBLIC OF SOUTH AFRICA • 1 ♂; Distant Bush; 28.586° S, 24.658° E; 1182 m a.s.l.; 1911; unknown leg.; NMSA • 1 ♂; Pretoria, Baviaanspoort; 25.664° S, 28.366° E; 1290 m a.s.l.; 15 Feb. 1920; H.K. Munro leg.; FSUNS ID 04277; NMSA • 1 ♀; Natal, Hilton Road; 29.597° S, 30.336° E; 833 m a.s.l.; 22 Dec. 1953; P. Graham leg.; FSUNS ID 04280; NMSA • 1 ♀; Pietermaritzburg; 29.597° S, 30.336° E; 833 m a.s.l.; 5 Nov. 1955; Oosthuizen leg.; reared from Gladiolus bulbs; FSUNS ID 04282; NBCN LML-05-5 • 1 ♂; same collection data as for preceding; FSUNS ID 04276; NMSA • 1 ♀; same collection data as for preceding; 19 Nov. 1955; FSUNS ID 04279; NMSA • 1 ♂; reared from Gladiolus bulbs in Wisley Horticultural Gardens (United Kingdom), which were brought from RSA; Jun. 1956; V.W. Fowler leg.; BMNH • 1 ♀; Transkei, Pitseng Pass, banks from Luzzi River; 30.749° S, 28.299° E; 1633 m a.s.l.; 11 Jan. 1979; J. Londt and B. Stuckenberg leg.; rocky hill and grassveld; FSUNS ID 04278; NMSA • 1 ♂; Eastern Cape, 5 km ENE of Rhodes; 30.783° S, 28.000° E; 2066 m a.s.l.; 5 Feb. 1992; wet stream gully; unknown leg.; FSUNS ID 04275; NMSA • 1 ♀; Eastern Cape, Naudes Nek, near top of pass; 30.759° S, 28.137° E; 2500 m a.s.l.; 6 Feb. 2009; S.I. Morita leg.; FSUNS ID 05724; USNM SMPC_SIM_1844 • 1 ♂; Drakensberg Mountain, Maclear-Naudes Nek; 30.759° S, 28.203° E; 1800 m a.s.l.; 9 Feb. 2016; S. Radenković and N. Veličković leg.; FSUNS ID ZA2_079; FSUNS. LESOTHO • 1 ♀; Colony of Basutoland, Orange Valley; 29.15° S, 29.03° E; 1500 m a.s.l.; R. Ellenberger leg.; FSUNS ID 03317; MNHN PM-05-46. Redescription Original description is insufficient, without any illustrations and based on a single male specimen from South Africa (Hull 1944). Length: large species, body 10–14 mm, wing 8–10 mm (n = 8). Male HEAD (Figs 4A, 9A, 11A, 12A). Antenna (Fig. 4A) very short, reddish to dark brown; scape and pedicel covered with dense, yellow pilosity; pedicel elongated, approximately as long as basoflagellomere (relation scape:pedicel: basoflagellomere =1.0: 1.8: 1.8); basoflagellomere concave dorsally, with rounded apex; arista light brown to dark brown, thickened basally, 5 times as long as basoflagellomere. Face reddish-yellow to dark brown, covered with yellow pollinosity and dense yellow pile, except on bare medial vitta that occupies 1⁄4 width of face (Fig. 11A). Oral margin reduced (Fig. 9A). Frons from black to reddish and golden-yellow, inflated, covered with golden-yellow pollinosity and pile. Vertical triangle isosceles (Fig. 12A), usually reddish to black, predominantly covered with a long, yellow pile. Ocellar triangle equilateral. Eye pile dense, long as the scape, often pale yellow to gray. Eye contiguity about 10–15 ommatidia long. Occiput reddish, covered with yellow pile. THORAX (Figs 6A, 10A). Mesonotum matte black, except lateral side of scutum including postpronotum and postalar callus, and posterior margin of scutellum reddish-yellow, covered with reddish pile; scutum with five pollinose longitudinal vittae (Fig. 10A). Pleuron covered with gray pollinosity and the following parts with whitish pile: anterior part of proepimeron, posterior part of anterior anepisternum, most of the posterior anepisternum except anterior end, antero-ventral and postero-dorsal part of katepisternum, anepimeron, and metasternum; in some specimens anterior anepisternum and katatergum reddish. Wing hyaline, with dense microtrichia and yellow to brown veins. Calypter pale yellow. Halter with yellow pedicel and capitulum. Legs usually dark brown to black (in some specimens partly reddish), except yellow basal third of tibiae. Metatrochanter without calcar. Metafemur moderately thickened, with less developed apicoventral triangular lamina, not dentate, only the apical dens is distinct, posteriorly oriented (Fig. 6A). Pile on legs predominantly yellow. ABDOMEN (Fig. 5A). Predominantly reddish-yellow (Fig. 5A). Reddish parts of terga 2–4 covered with yellow pile and dense pollinosity, while dark parts with short adpressed black pile; sterna from yellow to dark brown, covered with white or yellow pile. GENITALIA (Figs 3C, 13A–C). Posterior lobe of surstyle broad, rounded apically (Fig. 13A: pl); anterior lobe of surstyle undeveloped, virtually absent (Fig. 13A); cercus elongated (Fig. 13A: c). Hypandrium with theca slightly medially narrowed (Fig. 13C: marked with arrow). Lateral sclerite of aedeagus small, quadrilateral (Fig. 3C: s). Female (Figs 14A, 15A, 16A) Similar to the male except for normal sexual dimorphism: frons reddish-yellow, with broad goldish pollinose vittae along eye margins; frons completely covered with golden pile (Fig. 15A); metafemur with very small apicoventral triangular lamina; apical dens more or less distinct, slightly posteriorly oriented (Fig. 16A). Period of flight and distribution (Fig. 1) The species is distributed in the Republic of South Africa and Lesotho. On the basis of our data, the flight period was found to be from November to February. Merodon bombiformis was collected in different vegetation types, brush-grass savanna, temperate and mountain grasslands and montane foresttundra. On Drakensberg Mountain, at the locality between Maclear and Naudes Nek, it was found near the stream, within bushes of Leucosidea sericea Eckl. & Zeyh. (Rosaceae) and Gladiolus sp. on rocky soil (Fig. 24). Leucosidea sericea grows in Afromontane regions of southern Africa, and is the sole species of this genus (South African National Biodiversity Institute 2004). Larval biology Stuckenberg (1956) described the puparia of M. bombiformis, reared from larvae found feeding on commercially grown Gladiolus sp. (Iridaceae) corms. Specimens from Pietermaritzburg (5 Nov. 1955, 19 Nov. 1955) were reared from bulbs of Gladiolus L. too.
- Published as part of Vujić, Ante, Radenković, Snežana, Zorić, Ljiljana Šašić, Likov, Laura, Tot, Tamara, Veselić, Sanja & Djan, Mihajla, 2021, Revision of the Merodon bombiformis group (Diptera: Syrphidae) - rare and endemic African hoverflies, pp. 88-135 in European Journal of Taxonomy 755 (1) on pages 93-97, DOI: 10.5852/ejt.2021.755.1401, http://zenodo.org/record/5013000