Janstockia, Boxshall & Marchenkov, 2005

Boxshall, Geoff A. & Marchenkov, Andrey, 2005, A new genus of notodelphyid copepod (Crustacea, Copepoda, Cyclopoida) from a compound ascidian host collected in the Suez Canal, Zoosystema 27 (3), pp. 483-497 : 484

Genus Janstockia n. gen.

TYPE AND ONLY SPECIES. — Janstockia phallusiella n. sp. by original designation.

ETYMOLOGY. — The genus is named in honour of Professor Jan Stock, who contributed significantly to our knowledge of parasitic copepods from marine invertebrates.

DIAGNOSIS. — Adult female vermiform, comprising distinct head and elongate, unsegmented, postcephalic trunk terminating in small abdomen. Head with flared swollen posterolateral margins to dorsal cephalic shield. Antennule conical, tapering strongly from broad base. Antenna robust, with strong apical claw. Labrum an elongate lobe. Mandible represented by tapering, conical palp; gnathobase lacking. Maxillule complex, trilobate. Maxilla vestigial. Maxilliped elongate, indistinctly two-segmented with dense covering of hair-like setules over distal segment. First to fourth swimming legs distributed along trunk; leg pairs robust, biramous, rami typically with one or two sclerotized points derived from outer distal angles of proximal and middle segments, plus an array of reduced setae on vestigial distal segment. Fifth legs represented by paired setae on body surface. Genital field with midventral copulatory pore. Abdomen terminating in paired caudal lobes, each bearing cluster of setae derived from incorporated caudal rami. Male unknown.