Abstract

In comparing the head of Pseudopanurgus with Anthophora and Apis, the general outline appears rather similar, the most significant variation being found on the posterior surface. Extending ventrally from the postoccipital suture to the dorsal wall of the proboscidial fossa is a suture known as the fused hypostomal suture. The hypostomal area is rather small and makes up only a small portion of the dorsal and lateral walls of the proboscidial fossa, the remainder being formed by the postgena. If this is correct, the hypostomal carinae (a term with which the author does not agree) are actually located on the postgena. From this characteristic alone it would appear that Pseudopanurgus is more specialized than Apis but more primitive than Anthophora. The first abdominal sternum appears to be membranous in Pseudopanurgus, suggesting a specialization over both Anthophora and Apis, where sclerotized areas are still present. Some of the abdominal terga of Pseudopanurgus have a longitudinal suture on the ventrolateral angle. This also, suggests a specialization not found in Anthophora or Apis. Rather large gonostyli were observed on the gonocoxites of the male genitalia. Volsella are also present in Pseudopanurgus.

Degree

College and Department

Life Sciences; Plant and Wildlife Sciences

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