Third Exopodal Segment Of Leg Research Articles

Giardella ricoensis n. sp. from the West Indies and the Proposal of the New Genus Goodingius (Copepoda: Cyclopoida: Clausidiidae)

A new genus Goodingius is proposed to incorporate Hemicyclops adhaerens(Williams), H. arenicolae Gooding, H. elongatus Wilson and H. subadhaerens Gooding, all of which bear the six-segmented female urosome, three mandibular elements (or three elements plus one rudimentary setule), five setae on the first antennular segment, and no inner coxal seta of leg 4. The genus Giardella Canu, a sister taxon of Goodingius, is redefined as possessing eight elements on the third exopodal segment of leg 3, only a single inner seta on the second endopodal segment of leg 4, four spines on the third endopodal segment of leg 4. To the genus Giardella, Hemicyclops caissarum Kihara and Rocha and H. carinifer Humes are assigned, in addition to Giardella ricoensis n. sp., Giardella callianassae Canu, and G. thompsoni A. Scott. Keys to the species of both genera are provided.

A new species of the genus Amphiascoides (Copepoda: Harpacticoida) from Korean waters

A new species, Amphiascoides coreanus, is described from the sandy beaches of Sangju-ri, Namhae, and Dolsan-do, Yeosu, the south coast of Korea. This species is clearly distinguishable from its congeners with the combined characters of the short bulbous caudal setae IV and V, three-segmented antennary exopod, and only one inner seta of the Leg 3 exopod segment 3. Additionally, the species is easily distinguishable from the congeners by the minute spinules on the dorsal body surface. The new species shares the three-segmented antennary exopod and only four setae on the third exopodal segment of Leg 3 with A. dispar and A. paradebilis but displays the characteristic shape of caudal setae. This is the first record of the genus Amphiascoides in the region.

Two new species of siphonostomatoid copepods (crustacea) associated with the stoloniferan coraltubipora musica(Linnaeus) from Madagascar

Two new species of siphonostomatoid copepods, Asterocheres tubiporae n. sp. and Entomopsyllus stocki n. sp., associated with the stoloniferan coral Tubipora musica (Linnaeus) are described from Madagascar. Asterocheres tubiporae is characterized by the possession of a large posteroventral process on the caudal ramus and the elongated free segment of leg 5. Entomopsyllus stocki is readily distinguished from its congeners by the possession in the female of 15‐segmented antennule and three spines plus two setae on the third exopodal segment of leg 4.

Pseudanthessius spinosus, a new species of Copepoda (Poecilostomatoida, Pseudanthessiidae) Associated with the EchinoidClypeaster japonicusfrom Korea

Pseudanthessius spinosus n. sp. is described as an associate of the sea urchin Clypeaster japonicus Doderlein from Cheju Island in Korea. The new species may be easily distinguished from its congeners by having four spines and five setae on the third exopodal segment of leg 4. It is the second known species of the genus from Korean waters.