Four new species of mesozoan parasites (Mesozoa: Dicyemidae) from cephalopods of Bay of Bengal

Abstract

Four new species of mesozoans viz Dicyema qanapatii n.sp. from the renal appendages of Sepia elliptica Hoyle, Dicyema madrasensis n.sp. and Dicyema octopusi n.sp, from the renal appendages of Octopus sp.., and Dicyema nouveli n.sp, from the renal appendages of Loliqo duvauceli d' Orbigny are described. All the hosts were collected from different localities on the east coast of India.

Two new species of dicyemid mesozoans (Dicyemida: Dicyemidae) from Octopus maya Voss & Solis-Ramirez (Octopodidae) off Yucatan, Mexico

“…sp., intraspecific variation was found in the number of trunk peripheral cells (18-24). Similar variation in peripheral cells is found in several other dicyemid species (Furuya et al, 2007): Dicyema briarei Short, 1961; Dicyema octopusi Kalavati, Narasimhamurti & Suseela, 1984;Dicyema dolichocephalum Furuya, 1999, Dicyema sphaerocephalum Furuya, 2005 and Dicyema balanocephalum Furuya, 2006. However, D. hochbergi differs from D. sphaerocephalum and D. balanocephalum in the cell number of infusoriform embryos (39 vs 37) (Furuya et al, 2004a); and from D. dolichocephalum in the calotte shape (conical vs long, dome-shaped) (Furuya, 1999).…”

“…The axial cell of D. hochbergi n. sp. extends forward to overlap with about half the length of the metapolar cells whereas in D. octopusi it does not extend beyond the base of the metapolar cells (Kalavati et al, 1984). The maximum number and range of peripheral cells in D. hochbergi are the same as those for D. briarei (Short, 1961).…”

First descriptions of dicyemid mesozoans (Dicyemida: Dicyemidae) from Australian octopus (Octopodidae) and cuttlefish (Sepiidae), including a new record of Dicyemennea in Australian waters

“…4i) right renal appendages. P r e v a l e n c e : 7 hosts infected/7 hosts examined (100% infection rate) ( (Kalavati et al 1984, Furuya 1999, catalano and Furuya 2013 (Furuya 1999). this is the first dicyemid species documented and described from an Australian cuttlefish species.…”

Cell number and cellular composition in vermiform larvae of dicyemid mesozoans

“…In the adult and larval stages of dicyemids, generally the body consists of a fixed number of somatic cells. In several species, however, intraspecific variations have been observed in the number of trunk peripheral cells (Couch & Short, 1964; Hochberg & Short, 1970; Kalavati et al , 1984; Furuya, 1999). The present study reveals that some ranges of variations exist in the cell numbers of trunk peripheral cells; nevertheless, exceptionally few variations exist in the vermiform larvae with 22, 23 and 24 cells, of which 14 are trunk peripheral cells.…”