- Article (9) (remove)
- A re-evaluation of the milliped genus Motyxia Chamberlin : with a re-diagnosis of the tribe Xystocheirini and remarks on the bioluminescence (Polydesmida: Xystodesmidae) (1997)
- Motyxia Chamberlin is comprised of eight species of bioluminescent xystocheirine millipeds in which the gonopodal solenomere arises at different positions, from basally and subbasally on the acropodite to being fused with the companion acropodal branch and detaching proximad or near midlength. Previous synonymies of Amplocheir Chamberlin and LuminodeslnllS Loomis and Davenport under Motyxia are confirmed as is its assignment to the tribe Xystocheirini, which is redefined. Component species are 111. Iwnw Chamberlin, the type species, monica Chamberlin, sequoiae (Loomis and Davenport), tularea (Chamberlin), sequoia (Chamberlin), pior Chamberlin, porrecta Causey and Tiemann, and tiemanni Causey. Motyxia sequoia is comprised oftwo races, the nominate and sequoia alia Causey and Tiemann; sequoia ollae Causey and Tiemann is properly a subspecies of tularea. 1I1otyxiapiorform secea is an invalid name without standing in nomenclature, and M. tejona Chamberlin, and M. expansa and exilis, both by Loomis, are placed in synonymy under M. monica, the oldest name for the southernmost species, as Polydesllws dissectus Wood is referrable to Xystocheir Cook. The bioluminescence is a continuous, neon-white glow of the entire dorsal surface including the antennae and legs. Its visibility at night suggests a warning function analogous to aposematic coloration. The phenomenon may observe a circadian rhythm, and controlled photoperiod experimentation may be productive.
- Occurrence of the milliped, Stenodesmus tuobitus (Chamberlin), west of the Rio Grande (Polydesmida: Xystodesmidae) (1992)
- New records of the xystodesmid diplopod Stenodesmus tuobitus (Chamberlin) extend its range and those of the family and suborder Chelodesmidea into southwestern New Mexico, west of the Rio Grande. They confirm that it inhabits arid juniper environments at relatively low elevations as well as moist deciduous fir forests at high elevations, thereby lending credence to past records from the former habitat in Lincoln County. Discovery of the milliped in neighboring mountain ranges to the north and west is now likely, with the distant possibility that it may occur in eastern Arizona.
- Distribution of the centipede Scolopocryptops sexspinosus (Say) in Alaska and Canada (Scolopendromorpha: Cryptopidae) (1992)
- Specific Alaskan and Canadian localities are recorded for the chilopod Scolopocryptops sexspinosus (Say) (Cryptopidae), the only indigenous Nearctic scolopendromorph species occurring north of the lower 48 states. It occurs west of the crest of the Coast Range in British Columbia, extending northward to the southernmost islands of Alaska, and is recorded for the first time from eastern Canada, from Niagara Gorge, Ontario. Reports of S. rubiginosus Koch from southern Alaska are based on a misidentification of S. sexspinosus, and records from the north-central United States are too distant from the international border for it to be plausible for Manitoba and western Ontario. This centipede does not occur along the Pacific Coast and is improbable for any other part of Canada.
- The milliped genus Orophe Chamberlin (Polydesmida: Xystodesmidae) (1993)
- The milliped genus Orophe, characterized by long, twisted gonopodal telopodites with short subequal distal elements, is comprised of two allopatric species.
- Occurrence of the milliped Ergodesmus compactus Chamberlin in Canada (Polydesmida: Nearctodesmidae) (1995)
- Recent collecting in southcentral British Columbia, near the International Border, has confirmed the Canadian occurrence of the milliped Ergodesmus compactus Chamberlin, which was predicted by field work in the adjacent part of the United States. With Nearctodesmus insulanus (Chamberlin) occupying the Shuswap Highlands and the Pacific Coastal region, the Nearctodesmidae is known from three separate regions of Canada, all in British Columbia. Other millipeds in the northwestern United States that may be reasonably anticipated in western Canada are discussed.
- Annotated checklist of the millipeds of Florida (Arthropoda: Diplopoda) (2000)
- The milliped fauna of Florida consists of 8 orders, 18 families, 34 genera, and 51 species and subspecies; it comprises six elements: widespread species occurring widely in Florida, northern species reaching their southern limits in north Florida, neotropical species occurring naturally in Florida or adventive there, oriental adventives, Florida endemics, and southeastern endemics. A complete listing of these taxa is provided, with published and new records from the state, synonyms, and type localities. Georgiulus paynei Hoffman, Cleidogona alata Causey, and Pseudopolydesmus serratus (Say) are newly recorded from the state, and Eurymerodesmus serratus Shelley is deleted; Pseudojulus obtectus (Bollman) is recorded from Alabama.
- Occurrence of the milliped Pachydesmus crassicutis adsinicolus Hoffman in Florida (Polydesmida: Xystodesmidae) (2001)
- 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.