610 2006 (2007). The Journal of Arachnology 34:610–626 PSEUDALBIORIX, A NEW GENUS OF IDEORONCIDAE (PSEUDOSCORPIONES, NEOBISIOIDEA) FROM CENTRAL AMERICA Mark S. Harvey: Department of Terrestrial Invertebrates, Western Australian Museum, Locked Bag 49, Welshpool DC, Western Australia 6986, Australia. E-mail: mark.harvey@museum.wa.gov.au Rene ´ Barba Dı ´az: Dept. de Invertebrados, Instituto de Ecologı ´a y Sistema ´tica, A.P. 8029, C.P. 10800, Habana 8, Cuba. Current address: Grupo BioKarst, Sociedad Espeleolo ´gica de Cuba, Apartado Postal 2778, Habana 13, C.P. 11300, Cuba William B. Muchmore: Department of Biology, University of Rochester, Box 270211, Rochester, New York 14627-0211, USA Abel Pe ´rez Gonza ´lez: Grupo Biokarst, Sociedad Espeleolo ´gica de Cuba. Current address: Dept. Invertebrados, Lab. Aracnologia, Museu Nacional, Universidade Federal do Rio de Janeiro, Quinta da Boa Vista s/n, Sa ˜o Cristo ´va ˜o 20.940-040, Rio de Janeiro, Brazil ABSTRACT. A new genus of Ideoroncidae, Pseudalbiorix, is described from Central America, and is found to consist of four species: the type species P. reddelli (Muchmore 1982), new combination from southern Mexico, P. veracruzensis (Hoff 1945), new combination from Belize, Guatemala and southern Mexico, and P. muchmorei Barba & Pe ´rez, new species and P. armasi Barba & Pe ´rez, new species from western Cuba. Pseudalbiorix reddelli and P. veracruzensis are transferred from the genus Albiorix. Mem- bers of this genus differ from all other ideoroncids principally in the morphology of the chelal externo- distal condyle. All post-embryonic stages of P. reddelli are described. Keywords: Pseudoscorpions, Mexico, Cuba, taxonomy, morphology, new species, biospeleology, trog- lobite The pseudoscorpion family Ideoroncidae consists of several genera found in disparate parts of the world (e.g., Harvey 1991; Mah- nert 1984). The African fauna comprises three genera, Negroroncus Beier 1931, Nannoron- cus Beier 1955 and Afroroncus Mahnert 1981, mostly restricted to the eastern half of the con- tinent (Mahnert 1981), while the Asian fauna consists of the genera Dhanus Chamberlin 1930, Shravana Chamberlin 1930 and Nha- trangia Redikorzev 1938. The family is rep- resented in the Americas by another three genera, Ideoroncus Balzan 1887, Albiorix Chamberlin 1930 and Typhloroncus Much- more 1979 where a total of 30 species have thus far been named. The majority of Ameri- can ideoroncid species are found in epigean habitats but some, such as Ideoroncus cavi- cola Mahnert 2001 from Brazil, the four Mex- ican species of Typhloroncus, and several spe- cies of Albiorix, are restricted to caves. During research into the ideoroncid fauna of Central America, we have independently recognized the presence of some species that could not be placed within a pre-existing ge- nus. One of these, Albiorix reddelli Much- more 1982, was reluctantly included in Albio- rix by Muchmore (1982) and Mahnert (1984), but a satisfactory placement could not be found at the time. Our discovery of a further three species, including A. veracruzensis Hoff 1945, from various localities across Central America that share important morphological features with A. reddelli has enabled us to conclude that this group of species should be recognized as a distinct genus, to which we apply the name Pseudalbiorix. The aims of the present paper are to describe the new ge-