Anthidium preoccipitale, Kasparek, 2021

Kasparek, Max, 2021, Revision and description of three new species of the Palaearctic subgenus Gulanthidium of the wool carder bee genus Anthidium (Apoidea: Megachilidae: Anthidiini), Zootaxa 5040 (4), pp. 482-506 : 503

Key to the species of Anthidium (Gulanthidium)

Females The female of A. preoccipitale sp. nov. is not known.

1 Clypeus flat, with impunctate or less punctate median area, at base approximately one antennal diameter wide; outer face of hind tibia rounded or with rudimentary carina............................................................... 2

- Clypeus shallowly protruding in lower third (in lateral view), with impunctate or almost impunctate median area less than half as wide as an antennal diameter; outer face of hind tibia rounded................................................ 3

2 Vertex deeply concave in dorsal view; T5 with impunctate marginal zone (1–2 puncture diameters wide); outer face of hind tibia rounded [ Greece and Turkey to Iran and Levant]................................................... A. rotundum

- Vertex moderately concave in dorsal view; punctation on T5 reaching posterior margin; outer face of hind tibia with rudimentary carina [ Turkey and Arabian Peninsula to Central Asia]......................................... A. anguliventre

3 Integument canary yellow with the exception of some black remnants on scutum and in upper face; upper omaulus with low lamella; ratio clypeus length/maximal clypeus width>1.4 [ Afghanistan]........................ A. flavissimum sp. nov.

- Extensive black and/or (reddish-) brown on all tagmata; omaulus angular or rounded; ratio clypeus length/maximal clypeus width <1.4........................................................................................... 4

4 T3 rounded laterally rounded, T4–T5 bulging; omaulus rounded [Levant]................................ A. eremicum

- T3–T5 with lateral acute or blunt tooth; omaulus angulate to lamellate [ Morocco]................ A. occidentale sp. nov.