A New Shrimp Host for Parabopyrella lata (Nierstrasz and Brender à Brandis, 1929) (Crustacea: Isopoda: Bopyridae) from the Florida Gulf Coast: A Novel Host-Parasite Relationship or a Case of Mistaken Identity?

Identification of a bopyrid isopod found on a specimen of Lysmata wurdemanni (Gibbes) showed that it was not conspecific with the only known bopyrid parasite found on that host, Parabopyrella mortensi (Nierstrasz and Brender à Brandis, 1929). Instead, it is identifiable with a congeneric species, Parabopyrella lata (Nierstrasz and Brender à Brandis, 1929 ), formerly known only from alpheid shrimp hosts. A brief discussion of the implications of this finding on the question of level of host specificity is given, and evidence suggesting an accidental occurrence of the parasite on the host, rather than a successful host switch

New Host and Distribution Records for Leidya bimini Pearse, 1951 in the Gulf of Mexico, with Comments on Related Taxa and a Redescription of Cardiocepon pteroides Nobili, 1906 (Crustacea: Isopoda: Bopyridae: Ioninae)

Examination of grapsoid crabs, Armases cinereum (Bosc, 1802), in the Tampa Bay area revealed that 3.7% were infested with the bopyrid isopod Leidya bimini Pearse, 1951. These records represent a new host for the parasite and an extension of its range into the Gulf of Mexico. The relationships between the species of Leidya Cornalia and Panceri, 1861 and related genera have been difficult to ascertain, partly due to improper placement of some taxa within genera. The genera Leidya, Megacepon George, 1947, Allokepon Markham, 1982, and Cardiocepon Nobili, 1906 are discussed in terms of their species composition and phylogenetic relationships. Three species are placed in new combinations with genera: Leidya sesarmae Pearse, 1930 is tentatively placed in Megacepon, Allokepon goetici (Shiino, 1934) is transferred to Megacepon, and Portunicepon tiariniae Shiino, 1937 is transferred to Allokepon. The holotype of Cardiocepon pteroldes Nobili, 1906 is redescribed and figured, and some errors in the original description are corrected

A new species of Crinoniscus Pérez, 1900 (Crustacea: Isopoda: Crinoniscidae) parasitising the pedunculate barnacle Heteralepas newmani Buhl-Mortensen & Mifsud (Cirripedia: Heteralepadidae) with notes on its ecology and a review of the genus

The new species Crinoniscus stroembergi n. sp. belonging to the parasitic isopod family Crinoniscidae Bonnier, 1900, is described from a pedunculate barnacle host collected in the Mediterranean Sea. This is the first species of Crinoniscus Pérez, 1900 described from a host in the genus Heteralepas Pilsbry. The male cryptoniscus larva is distinguished from congeneric species by having a dorsoventrally flattened body with the posterolateral margins of the cephalon scarcely extending beyond the anterior margin of pereomere 1 (in contrast to C. cephalatus Hosie, 2008 with extended margins); articles 1 and 2 of the antennule being subequal in width and the anterodistal angle of antennule article being low and rounded; propodus of pereopods 6 and 7 having a sinuous dorsal margin that is distally narrowing and the posterior margin of the pleotelson being short and rounded. The mature females of species in Crinoniscus are of two basic forms: those with ventrolateral lobes on the pereomeres (C. alepadis (Gruvel, 1901) n. comb., and C. politosummus Hosie, 2008) and those lacking such lobes (C. cephalatus and C. stroembergi n. sp.). The mature females of C. stroembergi n. sp. can be distinguished from other species of Crininiscus based on their lacking lobes on the anterior end. The material examined includes the male and three female developmental stages of the parasite in the host, Heteralepas newmani Buhl-Mortensen & Mifsud. The mouthparts of the immature female are described and the feeding biology and effects on the host are discussed along with a review of feeding modes in species of the Cryptoniscoidea. Leponiscus alepadis is transferred to Crinoniscus; the latter genus now contains five species. A modified diagnosis of Crinoniscus is provided.publishedVersio

Micro-invertebrates (Phyla Sarcomastigophora, Gnathostomula, Gastrotricha, Rotifera, and Tardigrada)

44 p. ; 26 cm.Includes bibliographical references (p. 38-41) and index

Crustacea, Isopoda

39 p. ; 26 cm.Includes bibliographical references (p. 31-35) and index