Year of publication
- 2002 (2) (remove)
- Narceus woodruffi Causey : a forgotten milliped species (Spirobolida: Spirobolidae) (2002)
- Previous treatments ofthe east-Nearctic spirobolid genus Narceus Rafinesque have overlooked the name, N. woodruffi Causey. The holotype is lost, but examinations of a non-typical male and two paratype and three non-typical females show it to be a valid species, perhaps endemic to north Florida, distinguished by its small size and the configurations of the gonopods and coxal lobes of legs 3-6 in males. Supplemental anatomical notes are presented on the non-typical male along with comparative drawings of the lobes and gonopods of N. woodruffi, N. american us (Beauvois), and N. annularis (Rafinesque); distributions of species of Narceus in Florida are depicted on a map. Substantial size differences between ostensibly conspecific males of N. american us in Texas and Arkansas suggest that Narceus may be more complex than the current concept of four species.
- Parajulid milliped studies : 5. The genera Pseudojulus Bollman and Arvechambus Causey (Parajulinae: Aniulini) (2002)
- The parajulid milliped genus Pseudojulus Bollman comprises four species: P. obtectus (Bollman), P.paynei (Hoffman), n. comb., andP. carolinensis andP. coastalis, new species; Arvechambus Causey comprises two species, A. hummi and A. weemsi, both by Causey. Georgiulus Hoffman is placed in synonymy under Fseudojulus; G. hubrichti Hoffman is placed under P. paynei; and A. australis Causey is placed under A. hummi. The genera are sympatric in north Florida and southern Georgia, but Pseudojulus extends northward to coastal South Carolina and southcentral North Carolina, and westward to Alabama west of Mobile Bay. Both genera belong to the Aniulini and possess unique features; in Pseudojulus the anterior gonopod coxae are fused into a "shelf" on the dorsal surface ofthe complex that extends ventrad along the caudal margin and possesses a pair of posterior median syncoxallobes or laminas of varying lengths and configurations. Arvechambus exhibits a suite of apomorphies and is sister to the rest of the tribe collectively: the 8th sternum possesses elevated lateral lobes that overhang the sides ofthe gonopodal aperture; the 7th pleurotergite possesses lobes that also overlie the sides of the aperture; the anterior gonopods lack lateral syncoxal processes, the coxal lobes, much larger than in other tribal genera, arise laterad and obscure part of the telopodite in anterior view, and the telopodite is elongate rather than clavate; and the 2nd pleurotergite in females possesses lobes that overhang and effectively close the cyphopodal aperture.