Andrena (Euandrena) lustrum, WOOD, 2024

WOOD, T. J., 2024, Further revisions to the Palaearctic Andrena fauna (Hymenoptera: Andrenidae), Zootaxa 5483 (1), pp. 1-150 : 95-97

Andrena (Euandrena) lustrum spec. nov.

Figures 61A–F .

HOLOTYPE: IRAN: Yasouj , Doposhteh, Dashteroom, 30.5892 oN, 51.5169 oE, 2091m, 10.iv.2021, ♀, leg. E. Rostami, OÖLM (BOLD accession number: WPATW1180-23).

PARATYPES: IRAN: same information as holotype, 3♀, OÖLM/ TJWC; Yasouj, Doposhteh, Dashteroom, 2091m, 6.iv.2021, 1♀, leg. E. Rostami, OÖLM; Yasouj, Tange Tamoradi, 2247m, 9.iii.2021, 1♀, leg. E. Rostami, OÖLM .

Description: Female: Body length: 8–9 mm ( Figure 61A ). Head: Dark, 1.3 times wider than long ( Figure 61B ). Clypeus weakly domed, densely punctate, punctures separated by 0.5 puncture diameters, becoming marginally sparser medially, underlying surface smooth and shining. Process of labrum trapezoidal, 2 times wider than long, apical margin truncate, surface with weak latitudinal striations. Gena equalling width of compound eye; ocelloccipital distance equalling diameter of lateral ocellus. Foveae dorsally narrow, occupying ⅓ of space between compound eye and lateral ocellus, narrowing slightly ventrally, only just reaching dorsal level of antennal insertions; foveae filled with dark brown hairs. Face with predominantly long black hairs, with white hairs restricted to frons medially. Gena with black hairs, becoming white on vertex; facial hairs often exceeding length of scape. Antennae dark, A5–12 ventrally slightly lightened by presence of grey scales; A3 exceeding A4+5, only slightly shorter than A4+5+6.

Mesosoma: Scutum microreticulate, dull, with shallow and obscure punctures, punctures separated by 0.5–2 puncture diameters ( Figure 61C ). Scutellum less sculptured, weakly shining, densely and more distinctly punctate, punctures separated by 0.5–1 puncture diameters. Pronotum rounded. Mesepisternum and dorsolateral parts of propodeum with fine granular microreticulation, dull to very weakly shining. Propodeal triangle poorly defined, without lateral carinae, internal surface with finer microsculpture, thus defined relatively to dorsolateral parts of propodeum by change in sculpture ( Figure 61D ). Mesepisternum with long black hairs, clearly exceeding length of scape, scutum and scutellum with long white hairs. Propodeal corbicula incomplete, dorsal fringe composed of abundant long black plumose hairs, internal surface covered with long black simple hairs. Legs dark, pubescence black to brown. Flocculus moderately developed, composed of brownish to blackish plumose hairs; femoral scopae composed of light golden simple hairs, tibial scopae composed of light golden-brown simple hairs ventrally, dark brown hairs dorsally. Hind tarsal claws with inner tooth. Wings hyaline, stigma and venation dark orange, nervulus interstitial to slightly antefurcal.

Metasoma: Tergal discs dark, margins slightly depressed, apical rims lightened hyaline-brown ( Figure 61E ). Tergal discs shagreened, weakly shining, bearing small punctures with slightly and partially raised rims, giving rough appearance, punctures separated by 1–2 puncture diameters, punctures almost absent from marginal areas. Tergal discs with abundant long white erect hairs, not forming hairbands, not obscuring underlying surface. Apical fringe of T5 and hairs flanking pygidial plate dark brown ( Figure 61F ). Pygidial plate broadly rounded, surface medially obscurely punctate, dull.

Male: Unknown.

Diagnosis. Andrena lustrum can be placed in the subgenus Euandrena due to the narrow facial foveae, occupying slightly less than one third of the space between the compound eye and a lateral ocellus, the foveae narrowing further ventrally, pronotum without humeral angle, A3 long (clearly exceeding A4+5), and the simple hairs of the tibial scopae (hairs not plumose). Due to the extensive black and white pubescence of the body ( Figure 61A ; including abundant black hairs on the face and mesepisternum), the orange-brown tibial scopae, the terga with somewhat erect and sparse long white hairs that do not obscure the underlying surface (not forming clear and dense apical hairbands), and slightly depressed and lightened hyaline-brown tergal rims, A. lustrum is not particularly close to any hitherto known Euandrena species.

Separation from A. bicolor Fabricius, 1775 s.l., which often has black hair on the face and mesepisternum, can be made since A. bicolor usually has black and brown pubescence (rather than black and white), and because the tergal rims are not depressed and lightened hyaline-brown. Separation can be made from A. boustaniae using the same criteria as for A. coronula , specifically the process of the labrum is rounded trapezoidal, with the apical margin truncate (in A. boustaniae with the process of the labrum unusual, apically projecting, with deep median emargination) and foveae are dorsally narrow, occupying ⅓ of the space between the compound eye and a lateral ocellus (in A. boustaniae with foveae relatively broad, occupying over ½ the distance between the compound eye and a lateral ocellus). Genetically, the two species are separated by 12.83% (range 12.44–13.86%; Figure 58 ). Diagnosis against the superficially similar A. coronula is provided above.

Remarks. All specimens were collected from Acer monspessulanum ( Sapindaceae ).

Etymology. From the Latin lustrum meaning a bog, morass, or more generally a wild place, the latter chosen in reference to the extraordinary and understudied mountains of southern Iran. It is a noun in apposition.

Distribution. Southern Iran (province of Kohgiluyeh and Boyer-Ahmad).

Figures

FIGURE 61. Andrena (Euandrena) lustrum spec. nov. female.A. Habitus, lateral view; B. Face, frontal view; C. Scutum, dorsal view; D. Propodeum, dorsal view; E. Terga, dorsal view; F. T4–6 detail, dorsal view.

FIGURE58.Phylogenetic tree(maximum likelihood) ofAndrena subgenus EuandrenaHedicke,1933basedon themitochondrial COI gene. Numbers above branches represent bootstrap support (values of <75 are omitted).