Andrena ( Micrandrena ) libanica Wood, 2025

Pisanty, Gideon, Santerre, Rémi, Martin, Teresa, Cardinal, Sophie & Wood, Thomas J., 2025, Integrated taxonomic revision of the mining bee subgenus Andrena (Micrandrena) (Hymenoptera: Andrenidae) in the Levant and Cyprus, Arthropod Systematics & Phylogeny 83, pp. 573-655 : 573-655

publication ID	https://doi.org/10.3897/asp.83.e166986
DOI	https://doi.org/10.5281/zenodo.17511221
persistent identifier	https://treatment.plazi.org/id/68E0A0BA-7C2F-52E6-8C28-CEEB8A946129
treatment provided by	Arthropod Systematics & Phylogeny by Pensoft
scientific name	Andrena ( Micrandrena ) libanica Wood
status	sp. nov.

Treatment

3.1.2.13. Andrena ( Micrandrena) libanica Wood sp. nov.

Figures 10 View Figure 10 , 15 J View Figure 15 , 20 A, M View Figure 20

Etymology.

From the Latin name for Mount Lebanon, “ Libanus ”, with the feminine suffix - ica, thus “ libanica ” meaning “ of Mount Lebanon ”, given the observed geographic distribution of the species.

Diagnosis.

Andrena libanica is a typical member of the A. minutula species group with the propodeal triangle entirely rugose (Fig. 10 C, G View Figure 10 ). Within this group, it belongs to the species with more or less the apical half of the clypeus polished and shining (Fig. 10 B, F View Figure 10 ), the facial foveae relatively narrow along their entire length (equaling the diameter of a flagellum, Fig. 10 B View Figure 10 ), the head overall relatively elongate, around 1.1 times wider than long (Fig. 10 B, F View Figure 10 ), and the terga distinctly punctate. These are the species around A. rugulosa Stöckhert , which in the Levant and Cyprus are found in mountainous regions usually above 1200 m and include A. libanica , A. alshaykh Pisanty sp. nov. and A. lindbergella Pittioni. The female of Andrena libanica can be separated from all three comparison species due to the punctation of the terga, which have the punctures of the tergal discs separated by <0.5–0.5 puncture diameters, these punctures clearly defined against the underlying sculpture (Figs 10 D View Figure 10 , 15 J View Figure 15 ). In A. rugulosa , the tergal punctures are slightly sparser, separated by 0.5–1 puncture diameters, but obscure and difficult to see, disappearing into the underlying sculpture. In A. alshaykh and A. lindbergella , the tergal punctation is sporadic, with punctures separated by 0.5–3 puncture diameters (Fig. 15 K, L View Figure 15 ).

As in the females, the males can be recognised as close to A. alshaykh and A. lindbergella due to the clearly punctate terga combined with the clypeus smooth and strongly punctured in the apical ½ (Figs 10 F, H View Figure 10 , 20 A View Figure 20 ). Males of A. rugulosa are very similar, but in this species the terga are slightly more obscurely punctate, with punctures separated by 0.5–1 puncture diameters and not so strongly differentiated from the underlying shagreen (in A. libanica with punctures clearly distinct against the shagreened and weakly shining terga, punctures separated by <0.5–0.5 puncture diameters, Figs 10 H View Figure 10 , 20 A View Figure 20 ), and the scutal punctation slightly disappears into the strongly microreticulate and dull scutum (in A. libanica with the scutum more finely microreticulate, weakly shining, punctures remaining distinct across the entire disc, Fig. 10 G View Figure 10 ). Male A. libanica can be separated from A. alshaykh and A. lindbergella due to the tergal punctation and genital capsule. The genital capsule has the outer margin of the gonostyli straight, without a kink in the inner or outer margins (in A. alshaykh with a noticeable kink in the inner and outer margins of the gonostyli; Fig. 20 L, M View Figure 20 ), and the terga are strongly and densely punctate, with punctures separated by <0.5–0.5 puncture diameters (in A. lindbergella with the tergal punctures slightly but noticeably sparser, separated by 0.5–1 puncture diameters; Fig. 20 A, B View Figure 20 ).

Description.

Female. Body length: 6–7 mm. — Integumental colour: Body black. Flagellomeres 3–10 ventrally slightly lightened by presence of greyish scales. Legs black, apical tarsomeres slightly lightened orange-brown. Wings hyaline, stigma dark brown, venation dark orange (Fig. 10 A View Figure 10 ). Terga including marginal areas uniformly dark (Fig. 10 D View Figure 10 ). — Pubescence: Body hair relatively sparse. Face and gena with short whitish hairs, becoming light brown on vertex. Facial foveae filled with light brown hairs (Fig. 10 A – C View Figure 10 ). Dorsal mesosomal surfaces with short chestnut to dark brown hairs, these densely plumose, almost subsquamous (Fig. 10 A, C View Figure 10 ). Mesepisternum with longer white plumose hairs (Fig. 10 A View Figure 10 ). Propodeal corbicula incomplete, dorsoposterior fringe composed of moderately long plumose brownish hairs. Corbicular surface with abundant long light brown hairs. Leg hair whitish to light brown. Flocculus incomplete. Femoral and tibial scopae well-developed, femoral scopa composed of simple white hairs, tibial scopa composed of simple hairs, white ventrally, brown dorsally, tibial scopa thus bicoloured (Fig. 10 A View Figure 10 ). Tergal discs with very short pale hairs, visible only in profile. Marginal areas of terga 2–4 with apical hair fringes laterally, hairs emerging from base of marginal area and apical rim, thus apical fringes are formed from two rows of hairs; apical fringes widely interrupted, not forming complete bands. Terminal fringe dark brown (Fig. 10 A, D View Figure 10 ). — Head: 1.1 times broader than long (Fig. 10 B View Figure 10 ). Mandibles bidentate, moderately crossing apically. Labral process small, narrowly trapezoidal, slightly longer than wide to as long as wide. Clypeus weakly domed, smooth to polished in apical ¼ to ½, finely shagreened in basal ½, punctation distinct, punctures separated by 0.5–3 puncture diameters, densest basally (Fig. 10 B View Figure 10 ). Facial foveae narrow, occupying ¼ space between compound eye and lateral ocellus, uniformly narrow, equaling width of flagellum, ventrally extending to just below lower margin of antennal insertions, very slightly separated from inner margin of compound eye. Flagellomere 1 slightly exceeding 2 + 3, shorter than 2 + 3 + 4. Distance of fovea from lateral ocellus 2.2 ocellus diameters (Fig. 10 B, C View Figure 10 ). Ocelloccipital distance equals 0.6 ocellus diameter. Vertex distinctly angulate but not carinate (Fig. 10 C View Figure 10 ). — Mesosoma: Dorsolateral angle of pronotum rounded. Scutum and scutellum finely shagreened and shining, scutum densely and deeply punctate, punctures separated by 0.5–1 puncture diameters (Fig. 10 C View Figure 10 ). Mesepisternum finely reticulate. Propodeum with dense network of raised reticulation, propodeal triangle lacking lateral carinae, internally with dense network of strongly raised rugae with shining interspaces (Fig. 10 C View Figure 10 ). Hind pretarsal claw with small inner tooth. Recurrent vein 1 meeting submarginal cell 2 near its middle. Nervulus interstitial (Fig. 10 A View Figure 10 ). — Metasoma: Tergal discs finely shagreened, weakly shining, densely and deeply punctate, punctures separated by <0.5–0.5 puncture diameters. Punctures on disc of tergum 1 most coarse, almost confluent, becoming slightly finer on subsequent terga, punctures not extending onto marginal areas. Tergal margins slightly depressed (Fig. 10 D View Figure 10 ). Pygidial plate rounded, surface flat, with granular shagreen. — Male. Body length: 5–6 mm. — Integumental colour: As in female (Fig. 10 E, H View Figure 10 ). — Pubescence: Body hair longer and denser than in female, but more finely and less densely plumose, all pubescence white. Face, gena, and vertex with long white hairs, longest equaling length of scape (Fig. 10 E – G View Figure 10 ). Dorsal mesosomal surfaces with long erect white hair, long hairs present also on mesepisternum and propodeum (Fig. 10 E, G View Figure 10 ). Leg hair white (Fig. 10 E View Figure 10 ). Tergal discs with very short pale hairs, visible only in profile. Marginal areas of terga 2–4 with apical hair fringes laterally, hairs emerging from base of marginal area and apical rim, thus apical fringes are formed from two rows of hairs; apical fringes widely interrupted, not forming complete bands. Terminal fringe whitish-brown (Fig. 10 H View Figure 10 ). — Head: Clypeus structurally as in female, with clypeal shagreen uniformly weak, clypeus weakly shining over entire surface. Process of labrum very small, trapezoidal, slightly broader than long. Flagellomere 1 exceeding length of 2, shorter than 2 + 3; flagellomere 2 short, subsquare (Fig. 10 F View Figure 10 ). Ocelloccipital distance subequal to diameter of lateral ocellus (Fig. 10 G View Figure 10 ). — Mesosoma: As in female, with exception of slightly stronger scutal sculpture, becoming dull (Fig. 10 G View Figure 10 ). — Metasoma: As in female (Fig. 10 H View Figure 10 ). — Genitalia and hidden sterna: Dorsal gonocoxal lobes weakly but distinctly developed, forming short points. Gonostyli in dorsal view depressed below level of gonocoxites, dorsal surface subtly concave basally, apically becoming flattened and spatulate, inner margin slightly raised. Penis valves moderately broad basally, occupying ½ space between gonostyli, narrowing subapically to narrow point (Fig. 20 M View Figure 20 ). Sternum 8 simple, columnar, apex rounded to truncate, ventral surface covered with spreading fan of pale golden hairs.

Distribution.

Andrena libanica is known from remnant cedar forest habitats in the central part of the Mount Lebanon mountain chain. It has been collected between 1726–1885 m above sea level, making it a high altitude species. Previously reported from Lebanon as A. rugulosa ( Boustani et al. 2021)

Flight period.

Collected in mid-May; presumably extending also into June.

Flower records.

Collected from Brassicaceae ( Alyssum , Thlaspi ).

Type material.

HOLOTYPE: LEBANON ● 1 ♀; Mount Lebanon, Chouf Biosphere Reserve, Barouk trails ; 33.6858°N 35.6986°E; 1772 m a. s. l.; 16 May 2019; Sample 1579; BOLD accession number WPATW 973-22; RMNH RMNH.INS.1714343 GoogleMaps . – PARATYPES: LEBANON ● 1 ♂; Mount Lebanon, Chouf Biosphere Reserve, Barouk trails ; 1885 m a. s. l.; 16 May 2019; RMNH RMNH.INS.1714344 ● 1 ♂; Chouf Biosphere Reserve, Barouk trails ; 1772 m a. s. l.; 16 May 2019; TJWC ● 1 ♀, 1 ♂; Mount Lebanon, Chouf Biosphere Reserve, Maaser Gate ; 1726 m a. s. l.; 16 May 2019; RMNH RMNH.INS.1714345 to RMNH.INS.1714346 ● 1 ♀; ibid.; TJWC .