PROCEEDINGS OF THE BIOLOGICAL SOCIETY OF WASHINGTON 117(2): 186-198. 2004. New species and records of Bopyridae (Crustacea: Isopoda) infesting species of the genus Upogebia (Crustacea: Decapoda: Upogebiidae): the genera Orthione Markham, 1988, and Gyge Cornalia & Panceri, 1861 John C. Markham Arch Cape Marine Laboratory, Arch Cape, Oregon 97102-0105 U.S.A. Abstract. — Two bopyrid genera whose species parasitize only Upogebia spp. are reviewed and revised. Orthione Markham, 1988, heretofore known only from its type-species, O. furcata (Richardson, 1904), is rediagnosed and en-larged. Orthione grijfenis, new species, infests Upogebia pugettensis (Dana, 1852) in Oregon, U.S.A. Orthione mesoamericana, new species, infests U. spinigera (Smith, 1871) on the Pacific coasts of Costa Rica and Colombia. The genus Metabopyrus Shiino, 1939, is incorporated into Gyge Cornalia and Pan-ceri, 1861, which is rediagnosed, and a key is given to the four known species. Gyge ovalis (Shiino, 1939), formerly Metabopyrus ovalis Shiino, 1939, is re-described on the basis of new material found infesting U. edulis Ngoc-Ho & Chan, 1992, in Taiwan, a new host and geographical record. In a recent compilation of the known bo-pyrid parasites of thalassinidean decapod crustaceans throughout the world (Mark-ham 2001), I listed 26 species of the genus Upogebia known to harbor a total of 27 species of bopyrid isopods. Since then, ad-ditional material of parasites of species of Upogebia has become available for exami-nation or has been reliably reported to me. It includes two new species of Orthione Markham, 1988, described herein, as well as new host and geographic records for Me-tabopyrus ovalis Shiino, 1939, which is re-described and reassigned to the genus Gyge Cornalia & Panceri, 1861. Materials and Methods Host specimens bearing parasites, or par-asites that had been removed from their hosts, have become available for study from various sources over a period of several years. Some were already in scientific col-lections, while others are being newly do-nated to institutions housing such collec-tions. Those institutions are indicated thus: Museo de Zoologia, Universidad de Costa Rica, MZUCR; Naturhistorisches Museum, Wien, Austria, NHMW; Naturhistoriska Rijksmuseet, Sweden, SMNH; and Natural History Museum, Smithsonian Institution, USNM. Results Family Bopyridae Rafinesque-Schmaltz, 1815 Subfamily Pseudioninae Codreanu, 1967 Genus Orthione Markham, 1988 Type-species, by original designation, Pseudione furcata Richardson, 1904. Num-ber of previously known species: 1, O. fur-cata (Richardson, 1904), infesting Upoge-bia affnis (Say, 1818), Massachusetts to North Carolina, U.S.A. Revised generic diagnosis, based on three known species.-¥cma\e.. Body outline oblong, about twice as long as wide, sides nearly parallel, axis only slightly distorted, all body regions and segments distinct dor-sally. Head deeply set into pereon, its an-
New Species And Records Of Bopyridae (Crustacea : Isopoda) Infesting Species Of The Genus Upogebia (Crustacea : Decapoda : Upogebiidae): The Genera Orthione Markham, 1988, And Gyge Cornalia & Panceri, 1861
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