Hiltonius carpinus carpinus Chamberlin, 1943 (Spirobolida: Spirobolidae), is authoritatively recorded from the United States for the first time; it is known only from southern/southeastern Arizona but should be expected in adjoining counties of New Mexico. The northernmost locality is the Pinaleno Mountains, Graham County, and its distribution extends to southern Mexico; the other subspecies, H. c. vulcan (Chamberlin, 1953), occurs in Guatemala. The range of H. c. carpinus includes the type locality of the enigmatic H. fossulifer (Pocock, 1908), lending credence to prior suggestions that the names are synonymous. Three new Mexican states – Durango, Jalisco, and Nuevo León – are documented for H. c. carpinus

Shelley, Rowland M.

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CENTER FOR SYSTEMATIC ENTOMOLOGY, INC., Gainesville, FLOccurrence of the milliped, Hiltonius carpinus carpinus Chamberlin,1943 (Spirobolida: Spirobolidae), in the United Statesand new records from MexicoRowland M. ShelleyResearch LaboratoryNorth Carolina State Museum of Natural SciencesMSC #1626Raleigh, NC 27699-1626 USADate of Issue: March 12, 2010INSECTAMUNDI A Journal of World Insect Systematics0116Rowland M. ShelleyOccurrence of the milliped, Hiltonius carpinus carpinus Chamberlin, 1943(Spirobolida: Spirobolidae), in the United States and new records from MexicoInsecta Mundi 0116: 1-3Published in 2010 byCenter for Systematic Entomology, Inc.P. O. Box 141874Gainesville, FL 32614-1874 U. S. A.http://www.centerforsystematicentomology.org/Insecta Mundi is a journal primarily devoted to insect systematics, but articles can be published onany non-marine arthropod taxon. 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PaulsenPrinted copies deposited in libraries of:CSIRO, Canberra, ACT, AustraliaMuseu de Zoologia, São Paulo, BrazilAgriculture and Agrifood Canada, Ottawa, Ontario, CanadaThe Natural History Museum, London, EnglandMuzeum I Instytut Zoologii Pan, Warsaw, PolandNational Taiwan University, Taipei, TaiwanCalifornia Academy of Sciences, San Francisco, CA, USAFlorida Department of Agriculture and Consumer Services, Gainesville, FL, USAField Museum of Natural History, Chicago, IL, USANational Museum of Natural History, Smithsonian Institution, Washington, DC, USAElectronic copies in PDF format:Printed CD mailed to all members at end of year.Florida Center for Library Automation: purl.fcla.edu/fcla/insectamundiUniversity of Nebraska-Lincoln, Digital Commons: http://digitalcommons.unl.edu/insectamundi/Goethe Universität, Frankfurt am Main: http://edocs.ub.uni-frankfurt.de/volltexte/2010/14363/Author instructions available on the Insecta Mundi page at:http://www.centerforsystematicentomology.org/insectamundi/Printed Copy ISSN 0749-6737On-Line ISSN 1942-1354CD-ROM ISSN 1942-136210116: 1-3 2010Occurrence of the milliped, Hiltonius carpinus carpinus Chamberlin,1943 (Spirobolida: Spirobolidae), in the United Statesand new records from MexicoRowland M. ShelleyResearch LaboratoryNorth Carolina State Museum of Natural SciencesMSC #1626Raleigh, NC 27699-1626 USArowland.shelley@ncmail.netAbstract. Hiltonius carpinus carpinus Chamberlin, 1943 (Spirobolida: Spirobolidae), is authoritatively recordedfrom the United States for the first time; it is known only from southern/southeastern Arizona but should beexpected in adjoining counties of New Mexico. The northernmost locality is the Pinaleno Mountains, GrahamCounty, and its distribution extends to southern Mexico; the other subspecies, H. c. vulcan (Chamberlin, 1953),occurs in Guatemala. The range of H. c. carpinus includes the type locality of the enigmatic H. fossulifer (Pocock,1908), lending credence to prior suggestions that the names are synonymous. Three new Mexican states – Durango,Jalisco, and Nuevo León – are documented for H. c. carpinus.IntroductionThe milliped genus Hiltonius Chamberlin, 1918 (Spirobolida: Spirobolidae), comprises 10 species inGuatemala, Mexico, and southern Arizona and California, USA (Keeton 1960, Shelley 1995, Shelley andBauer 1997, Hoffman 1999). Chamberlin (1941) described H. thebanus from Theba, Maricopa County(Co.), Arizona, but this name is a junior synonym of Onychelus obustus Cook, 1904 (Spirobolida:Atopetholidae) (Shelley and Bauer 1997, Shelley 1998, Hoffman 1999). Keeton (1960) subsequently as-signed H. thebanus to a female spirobolidan from Santa Cruz Co., Arizona, that may be an actual speciesof Hiltonius, but the location of this specimen is unknown and the identification cannot be confirmed.Hiltonius has twice been authoritatively reported from Santa Cruz Co. (Shelley 1995, Shelley and Bauer1997), but a species has not been mentioned nor have any localities been documented; I therefore put onrecord here seven samples of H. carpinus Chamberlin, 1943, from southern and southeastern Arizona,primarily from mountainous regions. The northernmost locality, in the Pinaleno Mountains, GrahamCo., is some 95 mi (152 km) from the Mexican border, and the easternmost, from the Chiricahua Moun-tains, Cochise Co., is only around 10 mi (16 km) from the New Mexico line, suggesting that H. carpinusprobably occurs in the Peloncillo Mountains in the southwestern corner of this state. In Mexico, themilliped is known from Tamaulipas (2 mi [3.2 km] S El Limón), Hidalgo (4 mi [6.4 km] W Pachuca),Morelos (Tepoztlán), Guerrero (El Mogote, Grutas de El Mogote, 23.8 mi [38 km] NE Taxco), and Mexico(Ixtapan del Oro) states (Chamberlin 1943, Keeton 1960, Loomis 1966, Hoffman 1999, Bueno-Villegas etal. 2004). I now add localities in Durango, Jalisco, and Nuevo León that extend the distribution to thenorthwest and nearly across the breadth of the country. The most proximate Arizona locality, in CochiseCo., is about 430 mi (688 km) northwest of that in Durango.Hiltonius carpinus is a small to moderate-sized spirobolid with adult lengths varying from 41.9-59.0mm and widths from 5.1-8.1 mm; it is diagnosed by the uncinate anterior gonopod telopodites (Fig. 1) andthe apically bilobate posterior gonopods (Fig. 2). The Arizona males demonstrate these features and agreewith prior characterizations (Chamberlin 1943, Keeton 1960) except for the absences of spicules on bothappendages and the more prolonged corners of the anterior gonopod coxal endites [terminology of Keeton(1960)]. Keeton recognized two subspecies, the nominate, to which all present records belong, and H. c.vulcan (Chamberlin, 1953) from Volcan Tajumulco in southwestern Guatemala. Hoffman (1999) retainedthis taxonomy but suggested that separate species might be more appropriate. Resolution of this matteris beyond the scope of the present contribution and requires much more material.I append a map (Fig. 3) depicting known localities of H. carpinus. As the distribution encompasses theonly known locality of the enigmatic species, H. fossulifer (Pocock, 1908), indicated by the triangle –Omilteme, a settlement 10 mi (16 km) WSW of Chilpancingo, Guerrero (Selander and Vaurie 1962) – it2 • INSECTA MUNDI 0116, March 2010 SHELLEYlends substance to Keeton’s suspicion that thenames might be synonymous. New localities, allconstituting new state records, are detailed below;missing data was not provided on vial labels. Re-pository acronyms are AMNH, American Museumof Natural History, New York, USA; CNCO, Ca-nadian National Collection, Ottawa, Ontario,Canada; LACM, Los Angeles County Museum ofNatural History, Los Angeles, California, USA;LEMQ, Lyman Entomological Museum,MacDonald College, McGill University, Ste. Annede Bellevue, Québec, Canada; MHNG, Museumd’Histoire Naturelle, Geneva, Switzerland; NCSM,North Carolina State Museum of Natural Sciences,Raleigh, USA; and UAIC, Entomology Depart-ment, University of Arizona, Tucson, USA.USA: Arizona: Cochise Co., Southwest Research Station, 5 mi (8 km) W Portal, M, June 1956, E.Ordway (AMNH). Graham Co., Mt. Graham near Safford, 2M, 2F, 14 July 1956, W. J. Gertsch, V. Roth(AMNH, NCSM). Pima/Santa Cruz Cos., Madera Canyon, M, F, 30 June 1959 & juv. M, 23 August 1959(MHNG) and M, 25 July 1970 (LACM). Santa Cruz Co., Canelo, 2M, 2F, 4 September 1960. G. Butler(NCSM, UAIC); and Santa Rita Experiment Station, Florida, M, 9 July 1965, J. R. Bider (LEMQ).Mexico: Durango: 10 mi (16 km) W El Salto, M, F, 10 June 1964, J. E. H. Martin (CNCO). Jalisco:Ajijic, 5,000', in canyon, M, F, 20 September 1964, W. L. Nutting (NCSM). Nuevo León: 0.9 mi (1.4 km)S La Esmeralda, Cumbres de Monterrey National Park, 28° 8' N, 100° 29' W, 3M, 7F, 18 June 1975,Liner, Johnson, Chaney (NCSM).AcknowledgmentsI thank the following curators for loans from or access to specimens under their charge: L. Prendini(AMNH), R. Footit (CNCO), the late C.L. Hogue (LACM), the late D.K. McE. Kevan (LEMQ), P.Schwendinger (MHNG), and C. Olson (UAIC). F. Cupul-Magaña assisted with Mexican localities, and C.T. McAllister and R.L. Hoffman provided prepublication reviews.Literature CitedBueno-Villegas, J., P. Sierwald, and J. E. Bond. 2004. Diplopoda. p. 569-599. In: B. J. Llorente, J. J.Morrone, O. Yáñez, and I. Vargas (eds). Biodiversidad, Taxonomía y Biogeografia de Artrópodos deMéxico: Hacia una síntesis de su conocimiento. IV. UNAM; México. 660 p.Chamberlin, R. V. 1941. New American millipeds. Bulletin of the University of Utah 31(11) [BiologicalSeries 6(4)]: 1-39.Chamberlin, R. V. 1943. On Mexican millipeds. Bulletin of the University of Utah 34(7) [BiologicalSeries 8(3)]: 1-103.Hoffman, R. L. 1999. Checklist of the millipeds of North and Middle America. Virginia Museum ofNatural History Special Publication Number 8: 1-584.Keeton, W. T. 1960. A taxonomic study of the milliped family Spirobolidae (Diplopoda: Spirobolida).Memoirs of the American Entomological Society Number 17: 1-146.Loomis, H. F. 1966. Descriptions and records of Mexican Diplopoda. Annals of the Entomological Societyof America 59(1): 11-27.Selander, R. B., and P. Vaurie. 1962. A gazetteer to accompany the “Insecta” volumes of the “BiologiaCentrali-Americana.” American Museum Novitates Number 2099: 1-70.Shelley, R. M. 1995. The milliped family Hirudisomatidae in the New World (Polyzoniida). Brimleyana23:103-143.Shelley, R. M. 1998. The milliped genus Onychelus Cook (Spirobolida: Atopetholidae: Onychelinae).Myriapodologica 5(11): 111-117.Figure 1-2. Gonopods of Hiltonius c. carpinus male fromCochise Co., Arizona. 1, anterior gonopods, anterior view.2, left posterior gonopod, anterior view. Scale line = 1.00mm for both figs.INSECTA MUNDI 0116, March 2010 • 3 HILTONIUS C. CARPINUS IN THE U.S. AND MEXICOShelley, R. M., and S. B. Bauer. 1997. Distribution of the milliped Tylobolus utahensis Chamberlin,with remarks on T. fredericksoni Causey (Spirobolida: Spirobolidae). Great Basin Naturalist 57(3):231-237.Received December 1, 2009; Accepted January 27, 2010.Figure 3. Distribution of Hiltonius carpinus. Dots, H. c. carpinus. Star, H. c. vulcan. Triangle, type locality of H.fossulifer. AZ, Arizona; G, Guatemala; NM, New Mexico.4 • INSECTA MUNDI 0116, March 2010 SHELLEY

Occurrence of the milliped, Hiltonius carpinus carpinus Chamberlin, 1943 (Spirobolida: Spirobolidae), in the United States and new records from Mexico

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