dcsimg

Description

provided by NMNH Antarctic Invertebrates

"Empoulsenia, new genus

TYPE-SPECIES—Asterope quinquesetae Skogsberg, 1920.

ETYMOLOGY—The new genus is named after Dr. E. M. Poulsen. Gender: feminine.

REMARKS—Poulsen (1965:344) established a new genus Philippiella to contain two species described by Skogsberg (1920), Asterope spinifera and Asterope quinquesetae. Each of these species is referred to a different genus (both new) herein. Because the name Philippiella is preoccupied (see Kornicker, 1971:205), Dr. Poulsen (written comm., 1970) suggested that 1 make the necessary change. Because Dr. Poulsen did not designate a typespecies when he established Philippiella, the genus is technically not valid. Rather than validate the genus by designating a type-species and then proposing a new name for the genus, which I intended to subdivide, I have considered it simpler to allow the genus Philippiella established by Poulsen to remain invalid.

DIAGNOSIS OF GENUS—Carapace elongate, smooth, with slitlike incisur; 5-8 processes present on posterior infold between list and posterior edge of valve.

First antenna: 3rd joint with 6 dorsal bristles; sensory bristle of 6th joint of female with 1 short proximal and 6 long terminal filaments; d- and e-bristles of eighth joint well developed, d-bristle shorter than e-bristle.

Second antenna: Endopodite 3-jointed in both sexes, 3rd joint reflexed on adult male.

Mandible: Basale with 3-5 midbristles on dorsal margin. Exopodite one-third to one-half length of dorsal margin of 1st endopodite joint. Second joint of endopodite with long lateral bristle between band c-bristles.


Maxilla: Basale with 4-7 proximal bristles on ventral margin and 3 distal bristles on dorsal margin. End joint of endopodite with 1 long bristle.

Sixth limb: Anterior margin with 1 bristle (upper bristle) on E. quinquesetae, and 2 bristles on remaining species (E. pentathrix occasionally with only 1 bristle on one limb). End joint with 19-29 posteroventral bristles.

Seventh joint: Each limb with 16 to 30 bristles.

DISTRIBUTION—Members of the genus Empoulsenia are restricted to the Antarctic and Subantarctic. The northernmost latitude at which specimens were collected is 49°50'S. The southernmost locality is in the Weddell Sea. The known depth range of the genus is 40 to 1212 m, but it is seldom collected shallower than 200 m." (Kornicker 1975b, p.499-501)