Friday, August 27, 2021

[Entomology • 2021] Maurillus argenticapitis, Maurilloides nigrisoma & Evansiclavelia poecilopteryx • Systematics and Convergent Evolution in Three Australian Genera of Pepsinae Spider Wasps (Hymenoptera: Pompilidae)

  

Evansiclavelia poecilopteryx Pitts, Rodriguez & Shimizu 

in Shimizu, Pitts, Rodriguez, et al., 2021. 

 Abstract
We treat the Australian spider wasp ‘Ctenocerini’, revising the systematics of Maurillus Smith, adding a new species Maurillus argenticapitis Pitts & Shimizu sp. nov. and describing two new monobasic genera Maurilloides Pitts & Shimizu gen. nov. based on Maurilloides nigrisoma Pitts & Shimizu sp. nov. and Evansiclavelia Pitts, Rodriguez & Shimizu gen. nov. based on Evansiclavelia poecilopteryx Pitts, Rodriguez & Shimizu sp. nov. We further discuss the phylogenetic position of Maurillus and the convergent evolution of the modification in head and pronotal structures occurring in the above three genera, as well as in pompilids from other subfamilies, that parasitise trapdoor spiders.

Keywords: Evansiclavelia, Maurilloides, Maurillus, parasitoid, taxonomy, trapdoor


Maurillus argenticapitis Pitts & Shimizu sp. nov.

Etymology: The species name is derived from the greater part of the head covered with silvery-white pubescence.


Maurilloides Pitts & Shimizu gen. nov.

Etymology: The generic name is derived from a morphological similarity to Maurillus. The name is considered masculine in gender.

Maurilloides nigrisoma Pitts & Shimizu sp. nov.

Etymology: The species name is derived from the wholly black body.

Evansiclavelia poecilopteryx sp. nov., holotype female.
(a) Head, anterior view (arrow, frontal bridge); (b) head and anterior part of mesosoma, dorsal view; (c) head and mesosoma, lateral view; (d) head and mesosoma, dorsolateral view (arrow, occipital suture); (e) posterior part of mesosoma, dorsolateral view; (f) apical part of right fore tibia, medial view (arrow, apicomedial spine); (g) apical part of left fore tibia, lateral view (arrow, apicolateral spine); (h) body, legs and wings, lateral view; (i) body, part of legs and wings, dorsal view; (j) fore and hind wings; and (k) head, anteroventral view.
Scale bars: 0.1 mm for (f) and (g) and 1 mm for others.

Evansiclavelia Pitts, Rodriguez & Shimizu gen. nov.

Etymology: The generic name is in honour of the late entomologist Dr H. E. Evans, who was an authority on systematics and behaviour of solitary wasps, especially of spider wasps; and ‘Clavelia’ a generic name in the subfamily Ctenocerinae. The name is considered feminine.

Evansiclavelia poecilopteryx Pitts, Rodriguez & Shimizu sp. nov.

Etymology: The species name is derived from the transparent fore wing with subapical broad dark brown fascia.


Akira Shimizu, James P Pitts, Juanita Rodriguez, Raymond Wahis and Jin Yoshimura. 2021. Systematics and Convergent Evolution in Three Australian Genera of Pepsinae Spider Wasps (Hymenoptera: Pompilidae). Austral Entomology.  60(2); 301-316. DOI: 10.1111/aen.12530