Andrena (Larandrena) susanneae, Dubitzky, Andreas, 2006

Dubitzky, Andreas, 2006, New palearctic species of the bee genus Andrena (Insecta: Hymenoptera: Andrenidae), Zootaxa 1284, pp. 1-27 : 15-18

Andrena (Larandrena) susanneae sp. n.

( Figs 1 B, 3C, H, 4A)

Female. BL: 9.1–10 mm (9.7 mm). FWL: 7.3–7.8 mm (7.6 mm).

Structure. Head oval, about 1.4 times broader than long in frontal view. Mandibles normally long, apically bidentate. Process of labrum triangular, apically rounded, weakly dull to shiny. Clypeus 1.6 times broader than long, weakly tesselate except broad smooth and shiny area in the middle. Punctation of clypeus strong and distinct (=1) except broad impunctate median area. Lower part of supraclypeal area smooth and shiny, upper part strongly tesselate, dull. Frons densely tesselate, dull with distinct, dense longitudinal notches. Genal area slightly broader (1.2 times) than compound eye in lateral view, tesselate, weakly dull to shiny. Vertex 0.9 times as wide as lateral ocellus, tesselate to weakly granulate, dull. Hind margin of vertex weakly carinate in the middle. FOV long, parallel sided, reaching from upper margin of compound eye down to the level of anterior tentorial pit. Maximum width of FOV 1.7 times OD. Nearly no free space between inner margin of compound eye and FOV, only thin and smooth bare line on upper part developed ( Fig. 1 B). AS 3 about 1.8 times longer than broad, 1.2 times longer than following two segments together. AS 4– AS 6 slightly broader than long, AS 7– AS 11 about as long to slightly longer than broad. AS 12 about 1.4 times as long as broad. Pronotum tesselate, weakly dull to shiny, with indistinct punctation. Dorsolateral angle of propodeum distinctly carinate. Scutum strongly tesselate, dull except a smooth and shiny area on posterior part of disc, with large flat punctation (=1). Scutellum completely smooth and shiny except tesselate and dull area along hind margin. Punctation of scutellum similar to scutum. Metanotum densely granulate to finely wrinkled, dull, with indistinct punctation. PT granulate (apically) to indistinct finely wrinkled (basally). DLP and LP strongly tesselate to finely granulate, dull with indistinct weak punctation. Claws apically bidentate. T1–5 completely weakly tesselate, weakly dull to shiny with very indistinct, minute punctation. T therefore nearly impunctate. Marginal zone of T2 and 3 about 1/3 of total length of T, marginal zone of T4 nearly half as long as total length of T. Dorsolateral convexity of T weakly developed. Pygidial plate apically truncate, weakly dull to shiny with strongly elevated triangular area in the middle. Marginal zone of pygidial plate slightly concave with fine wrinkles arising from elevated triangular area. S tesselate, dull with indistinct dense punctation (1).

Integument colour. Mandibles black, apically reddened. Antennal flagellum blackish­brown. All other parts of head and thorax black. Tegulae yellowish­brown transparent. Legs blackish­brown to brownish. Distal tarsal segments brownish. Claws pale yellowish­brown basally, reddish­brown apically. Spurs bright yellowish­grey. Veins of wings and stigma bright yellowish­brown. T black to blackish­brown, with yellowishbrown transparent marginal zone. T1 and 2 sometimes with weak yellowish­brown maculations lateroventrally. Pygidial plate blackish­brown. S black to blackish­brown.

Pubescence. Clypeus with sparse yellowish­grey hairs, except bare median line. POA, SCA, dorsal side of scape, as well as main parts of vertex and GA with yellowish­grey to whitish, long hairs. FOV bright brownish (upper part) to whitish (lower part), when seen from above. Thorax with long yellowish­grey to white pubescence, hairs of scutellum and metanotum especially long and dense. PT bare, DLP with bright yellowish­grey hairs. Dorsal and anterior fringe of propodeal corbicula distinctly developed, consisting of long and dense, bright yellowish­grey hairs. LP with few branched, yellowish­grey hairs. Pubescence of legs mainly bright yellowish­grey. Flocculus of trochanter of hind leg distinctly developed, with long and dense branched, yellowish­white hairs. Tibial scopa of hind leg with long and dense simple yellowish­brown hairs, except few branched hairs ventrally. T1 with medium­long, dispersed pubescence of greyish­white hairs except short white apical fringes laterally. T2–4 with short dispersed white hairs on disc and dense white hair fringes apically (distinctly interrupted on T2 and 3, complete on T4). Prepygidial and pygidial fimbria yellowish­grey. S2–6 with sparse and short whitish­grey hairs forming weak fringe along apical margin.

Male. BL: 8.6 mm. FWL: 6.8 mm

Structure. As in female except for usual secondary sexual characteristics and as follows: Head oval, 1.5 times broader than long in frontal view. Mandibles medium­long, weakly falciform, bidentate. Clypeus 2.2 times broader than long, weakly tesselate with distinct punctation (=1). GA broad, 1.1 times as wide as compound eye in profile, strongly tesselate, dull. Vertex granulate, dull, distance from hind margin of LO to hind margin of vertex about as wide as OD. Scape nearly as long as following three segments together. AS 3 1.3 times longer than broad, 1.2 times longer than AS 4. AS 4– AS 12 about 1.2 times longer than broad, AS 13 nearly 1.6 times as long as broad. Pronotum tesselate, dull, laterally strongly carinate, with several longitudinal wrinkles. Legs slender, weakly tesselate. S7 and 8 as shown in Figs 3 C and H. Male genitalia as in Fig. 4 A.

Integument colour. Mandibles black, apically reddened. Clypeus completely bright yellowish, except two inconspicuous dark spots. Other parts of body black to blackishbrown.

Pubescence. Head with long whitish­grey pubescence, hairs most dense and distinct on clypeus. Pubescence of thorax less colourful, whitish­grey, much more sparse than in female. Pubescence of T extremely sparse, consisting of medium­long (T1) to short (T2–5) whitish hairs, weakly indicating apical fringes laterally on T2–4. Pubescence of T6 and T7 yellowish­grey. S with sparse, short to medium­long whitish hairs forming weak apical fringes in the middle.

Diagnosis. Andrena susanneae is placed in subgenus Larandrena by the combination of the following characters: Propodeal corbicula of females with strongly developed anterior and dorsoposterior hairfringe; LP of females with few simple hairs; male clypeus with yellowish coloration; shape of male genitalia, S7 and S8; gonocoxite of male genitalia with distinctly developed dorsal lobes; penis valve of male genitalia with distinct dorsolateral and ventrolateral lamella. Within Larandrena the new species is most similar to Andrena (Larandrena) echizenia Hirashima & Haneda, 1973 from Japan, from which it can be distinguished by the following characters (character states of A. echizenia in parentheses): FOV broad, about twice as wide as OD (narrow, about 1.4 times OD); no interspace between FOV and inner margin of compound eye developed (FOV and inner margin of compound eye separated by distinct smooth interspace); scutum on disc partly smooth and shiny, with distinct strong punctation (tesselate all over, punctation weak, indistinct); apical hair fringes of T2–4 strongly developed, nearly complete on T2 and 3 (weakly developed, broadly interrupted on T2 and 3); prepygidial and pygidial fimbria bright yellowish­grey (prepygidial and pygidial fimbria brownish); clypeus of male completely yellow (black with irregular yellow maculation in the middle); pubescence of head in the male uniformly bright grey (lateral parts of face, as well as dorsal parts of genal area with dark brownish pubescence); AS 3 of male about as long as AS 4 ( AS 3 about 1.3 times longer than AS 4). From the transpalearctic A. ventralis the new species is easily distinguished by the absence of distinct interspace between FOV and inner margin of compound eye and the absence of distinct wrinkles on the DLP in the females and by the length of AS 3 in the males.

Etymology. This species is named in honor of my beloved partner Susanne Szczepanek.

Type material. Holotype: Ψ, China, Manchuria, Charbin, 29.IV.1954, leg. V. Alin, Eing. Nr. 22, 1954 ( ZFMK). Paratypes: 1 Ψ, 1 ɗ, same data as holotype ( ZFMK); 2 ΨΨ, same data as holotype but Eing. Nr. 29, 1954 ( ZFMK); 1 Ψ, China, Manchuria, Charbin, 22.IV.1954, leg. V. Alin, Eing. Nr. 22, 1954 ( ZFMK); 1 Ψ, China, Manchuria, Charbin, 25.–30.. IV.1953, leg. V. Alin, Eing. Nr. 25, 1953 ( CAD).

Figures

FIGURE 1. Head and head structures, part I. A: Profile of male of A. planti sp. n.; B: Profile of female of A. susanneae sp. n.; C: Portrait of female of A. christineae sp. n.; D: Portrait of female of A. scheuchli sp. n.; E: Dorsal view of female head of A. christineae sp. n.; F: Dorsal view of female head of A. scheuchli sp. n.; G: Left FOV of female of A. christineae sp. n.; H: Left FOV of female of A. scheuchli sp. n. Dotted lines in Figs E – H indicate outline of FOV. Scale bars: 500 µm (A – F), 250 µm (G – H).

FIGURE 4. Male genitalia, part I, left dorsal, middle lateral and right ventral view. A: A. susanneae sp. n.; B: A. planti sp. n.; C: A. heinzi sp. n. Scale bars: 250 µm.

FIGURE 3. S 7 (A – E, ventral side) and S 8 (F – K) of male. A: A. heinzi sp. n.; B: A. planti sp. n.; C: A. susanneae sp. n.; D: A. yangi sp. n.; E: A. cheni sp. n.; F: A. heinzi sp. n. (dorsal side); G: A. planti sp. n. (ventral side); H: A. susanneae sp. n. (left dorsal, right ventral side); I: A. yangi sp. n. (left dorsal, right ventral side); J: A. nantouensis sp. n. (left dorsal, right ventral side); K: A. cheni sp. n. (left dorsal, right ventral side). Scale bars: 250 µm.