Andrena (Micrandrena) obsidiana Wood, 2022

Wood, Thomas J. & Monfared, Alireza, 2022, A revision of the Andrena (Hymenoptera: Andrenidae) fauna of Iran, with the description of 16 new species, European Journal of Taxonomy 843, pp. 1-136 : 25-27

Andrena (Micrandrena) obsidiana Wood sp. nov.

urn:lsid:zoobank.org:act:D3E4C96A-F24F-4E98-8A5B-DD2E17D9957D

Figs 55–60

Diagnosis

Andrena obsidiana sp. nov. can be place in the subgenus Micrandrena because of its small body size ( Fig. 55 ), black integument, and strongly rugose propodeal triangle. Andrena obsidiana lacks a gradulus at the base of T2–3 ( Fig. 60 ), and has brilliant, completely unshagreened shiny terga. This unusual combination of characters separates it from all Middle Eastern species of Micrandrena . The only slightly similar species is A. omnilaevis Wood, 2020 from northern Spain and Portugal. Apart from the clear geographic separation, A. obsidiana can easily be separated by its narrower foveae which occupy ⅓ of the space between the compound eye and the lateral ocellus (occupying half of this space) and completely shiny scutum and terga (scutum and tergal discs with faint shagreenation).

Etymology

From obsidian, a dark black igneous rock that can be polished to a brilliant shine, in reference to the shiny terga lacking in shagreenation or microreticulation.

Material examined

Holotype IRAN • ♀; Ilam Province, Abda Man, Dinar Gaouh ; 32.915° N, 47.301° E; 1830 m a.s.l.; 12 May 2016; M. Kafka leg.; OÖLM.

Paratypes IRAN • 44 ♀♀; Ilam Province, Abda Man, Dinar Gaouh ; 1830 m a.s.l.; 12 May 2016; M. Kafka leg.; OÖLM • 8 ♀♀; same collection data as for preceding; TJWC • 3 ♀♀; Ham [Ilam] Province, Sar Joob ; 1930 m a.s.l.; M. Kafka leg.; OÖLM • 5 ♀♀; Lorestan Province, Dorud Lanjaban env.; 670 m a.s.l.; M. Kafka leg.; OÖLM • 2 ♀♀; Fars Province, Dast Arjan ; 2040 m a.s.l.; M. Kafka leg.; OÖLM • 1 ♀; Tehran, Ziyaran, Samgh Abad ; 1900 m a.s.l.; M. Kafka leg.; OÖLM • 1 ♀; West Azerbaijan Province, Serou ; 1650 m a.s.l.; 28 May 2010; Mi. Halada leg.; OÖLM • 7 ♀♀; Fars Province [Kohgiluyeh and Boyer-Ahmad Province], Yasuj [Yasouj], Sarb-e Taveh [Sarab-e Taveh]; 2030 m a.s.l.; M. Kafka leg.; OÖLM .

TURKEY • 1 ♀; Hakkâri, Varegös / Mt. Sat ; 1800 m a.s.l.; 21 May 1989; K. Warncke leg.; OÖLM • 1 ♀; Hakkâri, Varegös / Mt. Sat ; 1700 m a.s.l.; 15 Jun. 1984; K. Warncke leg.; OÖLM • 1 ♀; Hakkâri, Tanin-Tanin Pass ; 2300 m a.s.l.; 12 Jun. 1984; K. Warncke leg.; OÖLM • 1 ♀; Hakkâri, Tanin-Tanin Pass ; 2300 m a.s.l.; 19 May 1989; K. Warncke leg.; OÖLM • 2 ♀♀; Hakkâri, Beytüşşebap ; 25 May 1988; K. Warncke leg.; OÖLM • 13 ♀♀; Nemrut Dag [Dağı]/ Adiyaman; 1500 m a.s.l.; 1 Jun. 1983; K. Warncke leg.; OÖLM .

Description

Female

MEASUREMENTS. Body length 6.5–7 mm ( Fig. 55 ).

HEAD. 1.3 times as wide as long. Clypeus dark, domed, irregularly punctate, punctures from touching to separated by 2 puncture diameters ( Fig. 56 ). Clypeus integument basally with raised microreticulation, forming latitudinal wrinkes, becoming weaker centrally, absent in apical ⅓; clypeus weakly shining throughout. Process of labrum narrow, weakly tongue-shaped, slightly wider than long, apical margin weakly rounded. Face, gena, vertex, and scape with whitish to brownish hairs, longest on vertex, not equalling length of scape. Gena equalling width of compound eyes; ocelloccipital distance slightly less than diameter of lateral ocellus. Foveae narrow, dorsally occupying ¼ of distance between compound eye and lateral ocellus, equalling width of flagellum, slightly narrowed below at level of antennal insertions; foveae filled with light brownish hairs. A3=A4+5.

MESOSOMA. Scutum and scutellum brilliantly polished, dorsally without trace of shagreenation, smooth and shining ( Fig. 57 ). Scutum with dense but irregularly-sized punctures, punctures separated by 1–3 puncture diameters ( Fig. 58 ); scutellum with sparser punctation, punctures separated by 1–5 puncture diameters. Pronotum without humeral angle. Mesepisternum and lateral face of propodeum with fine granular shagreen, weakly shining. Propodeal triangle lateraly delineated with fine carinae, internal surface with network of raised rugosity, rugosity extending laterally over boundaries of propodeal triangle onto dorsolateral faces of propodeum, propodeal triangle therefore poorly defined. Mesosoma with short and scattered whitish hairs; propodeal corbiculae thin, dorsally composed of whitish-brownish plumose hairs, internal surface with numerous simple white hairs. Legs uniformly dark, pubescence whitish to light brownish, scopae and flocculus whitish. Hind tarsal claws with small inner tooth. Wings hyaline, stigma dark brown, venation light to dark brown; nervulus interstitial to weakly antefurcal, first recurrent vein enters second submarginal cell at its middle to slightly beyond its middle.

METASOMA. Terga dark, apical margins of T2–4 very slightly depressed, margins with extremely narrow rim slightly lightened dark red, essentially unicolourous with disc ( Fig. 59 ). Gradulus absent at visible base of T2–3. Terga without shagreen, uniformly polished, brilliant, smooth and shining throughout ( Fig. 60 ). Discs of terga clearly punctate; T1 with punctures separated by 2–3 puncture diameters centrally, laterally extremely sparse; T2–4 punctures more regular, separated by 1–2 puncture diameters throughout; terga margins with scattered irregular weak and fine punctures. Tergal hair bands barely developed, T2–4 laterally with weak and obscure hair fringes. Apical fringe of T5 and hairs flanking pygidial plate dark golden to brownish; pygidial plate narrowly rounded triangular, flat, dull.

Male

Unknown.

Distribution

Southern (province of Adıyaman) and Eastern Turkey (province of Hakkâri) and Iran (provinces of West Azerbaijan, Tehran, Ilam, Lorestan, Fars).

Figures

Figs 55–60. Andrena obsidiana Wood sp. nov., ♀ (OÖLM). 55. Profile. 56. Face.57. Dorsum.58. Scutum, detail. 59. Terga. 60. Terga, detail.