The Parasitic Crustaceans of Fishes From the Brazilian Amazon 8 Acusicola Lycengraulidis N. Sp. (Copepoda: Cyclopidea) From Lycengraulis Grossidens Cuvier

Abstract

The female of Acusicola lycengraulidis n. sp. (Copepoda: Cyclopidea) is des cribed from the gills of an Amazonian fish, Lycengraulis grossidens Cuvier. The new species differs from the other three known for the genus in having an inflated céphalothorax which incorporates the first leg bearing segment. The new species therefore has only five free thoracic seg ments instead of six. Also, A. lycengraulidis n. sp. has a more slender second seg ment on the first endopod and a curved and pointed terminal segment on the fourth endopod.

New species of parasitic copepods of the Genus Acusicola (Poecilostomatoida: Ergasilidae) from gill filaments of coastal and freshwater Brazilian fishes, and proposition of Acusicola rogeri n. sp. for A. tenax sensu Cressey & Collette (1970)

“…But in A. rotunda the apex of the terminal endopodal segment of legs 2 and 3 also tapers into a spiniform process instead of a stout spine as stated by Thatcher & Boeger (1983) for A . But in A. rotunda the apex of the terminal endopodal segment of legs 2 and 3 also tapers into a spiniform process instead of a stout spine as stated by Thatcher & Boeger (1983) for A .…”

“…n. 6a Terminal endopodal segment of leg 2 armed with 5 setae . lycengraulidis Thatcher & Boeger, 1983 7b Terminal endopodal segment of leg 1 with 4 inner setae 8 8a First exopodal segment of leg 1 with outer spine ; terminal endopodal segment of leg 4 ending in a falciform process A . cunula Cressey, 1970 6b Terminal endopodal segment of leg 2 armed with 4 setae and a spine A .…”

“…Kabata (1979) rejected this genus and transferred these two species to Ergasilus Nordmann, 1832 . Thatcher & Boeger (1983) described A . lycengraulidis and A .…”

Proposal of Tiddergasilus gen. nov. (Ergasilidae: Cyclopoida) for T. iheringi comb. nov. from the gills of Hoplias malabaricus (Erythrinidae: Characiformes) from Brazil

“…Three genera were chosen as functional outgroups: Acusicola, Miracetyma, and Amplexibranchius. Species of these genera are characterized by having a latching groove in the third segment for receiving the opposite claw (Thatcher 1984). Clade stability was measured using Bremer's support (Bremer 1994), calculated in PAUP according to Bremer (1994).…”

The life-cycle of Ergasilus briani Markewitsch, 1993 (Copepoda: Poecilostomatoida)

“…The pigment is generally located ventrally either in longitudinal bands, as in E. colomensus Thatcher & Boeger (Thatcher & Boeger, 1983a), small widely scattered patches, as in E. sieboldi (cf. Colours range from violet as in E. pitalicus (see Thatcher, 1984), through cobalt blue, as in Acusicola pellonidis Thatcher & Boeger (Thatcher & Boeger, 1983b), to green as in Brasergasilus jaraquensis Thatcher & Boeger (see Thatcher & Boeger, 1983~). In some species the antennules, antennae and swimming legs also have pigment patches, as in E. pitalicus (see Thatcher, 1984) and E. callophysus Thatcher & Boeger (see Thatcher & Boeger, 1984).…”