TY  - JOUR
AB  - Five new species and one new genus of the obscure spioniform family Uncispionidae are described together with three new species of the rare and unusual spionid genus <i>Pygospiopsis</i> Blake, 1983. All species are from offshore habitats with most from deep-sea continental slope depths. Among the Uncispionidae are the second and third species of the genus <i>Uncopherusa</i> Fauchald & Hancock, 1981, collected from off Brunei in the South China Sea and off Louisiana in the Gulf of Mexico; two new species of <i>Uncispio</i> Green, 1982, the third and fourth to be described, from deep water off the U.S. Atlantic coast and the Gulf of Mexico; and a new species of a new genus, <i>Rhamphispio</i> n. gen., from off the U.S. Atlantic coast. All species of Uncispionidae are compared and a key to the known species is presented. The genus <i>Pygospiopsis</i> Blake, 1983, is currently known for only two species: <i>P. dubia</i> (Monro, 1930) from Antarctic and sub-Antarctic waters and <i>P. occipitalis</i> Blake, 1996, from shelf depths off southern California. In the present study, new collections of the type-species <i>P. dubia</i> from the Antarctic Peninsula include post-larvae and juveniles as well as adults, thus permitting documentation of the development of some key adult morphology. Three new species of <i>Pygospiopsis</i> are described from deep water off the U.S. Atlantic and Pacific coasts and from the Antarctic Peninsula. A review of all species of <i>Pygospiopsis</i> suggests that, based on branchial distribution patterns, the closely related <i>Pseudatherospio fauchaldi</i> Lovell, 1994, should be referred to <i>Pygospiopsis</i>, bringing the total known species to six. All of these are compared and contrasted and the generic definition of <i>Pygospiopsis</i> updated. The status of <i>Pygospiopsis</i> within the Spionidae relative to the closely related genus <i>Atherospio</i> Mackie & Duff, 1986, is discussed.  
A1  - Blake, James A.
A1  - Maciolek, Nancy J.
DO  - 10.11646/zootaxa.4450.2.1
JO  - Zootaxa
N1  - World Polychaeta Database (WPolyDb). Open access article at Zootaxa
IS  - 2
SP  - 151
EP  - 195
C1  - 4450(2): 151-195
TI  - New species and records of Uncispionidae and <i>Pygospiopsis</i> (Polychaeta, Spionida) from deep water off the east and west coasts of North America, the Gulf of Mexico, the Antarctic Peninsula, and Southeast Asia
UR  - http://www.mapress.com/j/zt/article/view/zootaxa.4450.2.1
VL  - 4450
PY  - 2018
Y2  - 2026-08-18
ER  -