Revision and description of three new species of the Palaearctic subgenus Gulanthidium of the wool carder bee genus Anthidium (Apoidea: Megachilidae: Anthidiini) Author Kasparek, Max text Zootaxa 2021 2021-09-23 5040 4 482 506 journal article 10.11646/zootaxa.5040.4.2 1175-5326 5531631 5F8211F3-51D4-45A8-BD5D-A655F5A6EFDE Anthidium occidentale sp. nov. ( Figs 1 , 2C , 6C, 6G , 7C , 8C , 9B, 9E , 10 ) Type material. HOLOTYPE : Morocco : male, 10 km S Bouarfa [ 32°31’N , 1°58’W ], 20.v.1995 , Ma. Halada leg. ( CMK ) .— PARATYPES : Morocco : 1♀ , 11♂ , High Atlas Mountains south of Tizi n’Test pass in the Sous-Massa Region of Morocco [ 30°51’N , 8°22’W ], 1900 m , 29.–30.vi.1987 , M. Schwarz leg. ( CMK ).— 157♀ , 6♂ , 10 km S Bouarfa [ 32°31’N , 1°58’W ], 20.v.1995 , Ma. Halada leg. ( CMK ).— 1♂ , Agdz env. [ 30°42’N , 6°27’W ], 1000 m , 14.vii.1975 , A. W. Ebmer leg. (coll. A. W. Ebmer ) . Additional material examined. 1♂ , Beni Bassia 60 km NE Boudnib [ 32°14’N , 3°09’W ], 21.v.1995 , Ma. Hala- da leg. ( CMK ).— MOROCCO : 10 km S Bouarfa [ 32°31’N , 1°58’W ] , 95♀ , 20.v.1995 , Ma. Halada leg. ( OLL ).— Agdz env. [ 30°42’N , 6°27’W ], 1000 m , 1♂ , 14.vii.1975 , J. Gusenleitner leg. ( OLL ) . Derivatio nominis. The epithet is derived from Latin “occidentâlis” (occidentâle as neuter) which means “western” and indicates that this is the westernmost species of the subgenus Gulanthidium . Diagnosis: The female is characterised by a narrow impunctate middle line on the clypeus, often with a somewhat scarred surface, which it shares with A. eremicum and A. flavissimum ( Table 1 ). Among these species, A. eremicum has a rounded omaulus and bulged lateral T4–T5 (omaulus angulate and T4–T5 toothed in A. occidentale ), and A. flavissimum a conspicuously lamellate upper omaulus (angulate in A. occidentale ). Anthidium flavissimum is also distinguished by its bright yellow colouration with only a few black remnants in the face and on the scutum (light yellow to reddish-brown with rich black maculation in A. occidentale ) and a broader clypeus (ratio clypeus length/maximal clypeus width>1.4 as compared with < 1.4 in A. occidentale ). The male is most similar to A. eremicum and is distinguished by the triangular to drop-shaped form of the apex of the penis valves (in dorsolateral view), which is elongate in A. eremicum . Anthidum occidentale is the only known species of the subgenus Gulanthidium in north-western Africa. Description. Female. 8–9 mm . Head: Clypeus ( Fig. 7D ) light yellow with straight anterior and posterior margins; light brown transparent apex; impunctate middle line approximately half an antennal diameter wide, often somewhat scarred; mandible yellow with five teeth and an additional minute tooth distal to the upper tooth; supraclypeal area yellow and reddish-brown; paraocular area below the antennal socket yellow, tapering above the antennal socket and becoming increasingly reddish-brown; vertex reddish-brown, gena yellow; preoccipital ridge rounded and moderately concave as seen from dorsal ( Fig. 10A ); antenna reddish-brown.— Mesosoma: Scutum black with yellow L-shaped anterolateral band and a yellow longitudinal crescent-shaped stripe next to the middle; scutellum yellow with median posterior impression and narrow transparent posterior margin; base reddish-brown; axilla slightly protruding, yellow and with some reddish-brown on the anterior side; mesepisternum yellow (smooth anterior face reddish-brown and black), omaulus angular.— Metasoma : Terga reddish-brown to black, semi-transparent depressions; bands of T1–T6 yellow with reddish-yellow margins; T1–T2 rounded laterally; T3–T5 laterally toothed; T6 depressed in lateral view, light yellow with two dark spots next to the middle.— Legs: Hind tibia rounded, hind metatarsus with longitudinal carina. Male. 8–9 mm . Head : Clypeus bell-shaped with straight anterior margin; lateral margin slightly curved outwards posteriorly; posterior margin semi-transparent, deep yellow and straight; punctation scattered at base and sometimes along middle line but otherwise dense; mandible deep yellow with three strong black teeth; supraclypeal and paraocular area yellow; yellow upper paraocular area confluent with reddish-brown vertex; vertex reddishbrown, sometimes yellow at preoccipital ridge; preoccipital ridge angulate; gena yellow; upper face from posterior ocelli to antennal sockets black (or rarely [one case] reddish-brown), with black maculation rarely extending onto vertex; antenna reddish-brown, lighter on ventral than dorsal surface; ventral surface of scape yellow; entire face including clypeus with long adpressed white hairs.— Mesosoma : Scutum black with broad yellow L-shaped anterolateral band; semi-crescentic band next to the middle, with some variation to length and width (usually merged with the yellow lateral band at notaulus); scutellum widely rounded in dorsal view with median emargination; overhanging propodeum; scutellum and axilla yellow, with base of scutellum reddish-brown; propodeal triangle roughened, punctate posteriorly; mesepisternum yellow with dense white pubescence; pronotal lobe lamellate.— Metasoma : Terga with yellow bands; depressions semi-transparent, light or dark brown; T3–T6 with acute lateral projection, increasing in size from T3 towards T6; disc of T6 bulging apically next to the centre; T7 semi-circular with some slight flattening at apex ( Figs 8C , 9B ); sterna light reddish-brown with white pubescence at apical margins; S5 widely emarginate; S6 semicircular, shining, with lateral depression ( Fig. 9E ).— Hidden sterna and genitalia: See separate chapter. Distribution. Endemic to Morocco ( Fig. 12 ). Found in the southwestern and eastern High Atlas Mountains and the southern Saharan Atlas Mountains. Elevations varied between 970 m (Beni Bassia) and 1900 m (Tizi-n-Test). Remarks. It is likely that records listed by van der Zanden (1996) under A. anguliventre and by Ascher & Pickering (2021) under A. eremicum (see also Lhomme et al. , 2020 ) refer to this species. Biology. All material was collected between May and July.