Haliactiidae with very elongate, vermiform body. Column divisible into physa, scapus and capitulum or not. Capitulum with spirocysts, scapus with longitudinal rows of stinging warts or spots. Cinclides in the upper part of the column, arranged in longitudinal rows. No distinct sphincter. Uppermost part of the capitulum and the oral disc thrown out into 6 long outgrowths or pedicels each bifurcating two or three times. Most of tentacles placed in groups at the distal end of the pedicels. Actinophorynx [sic] long. 2 siphonoglyphs. Mesenteries divisible into macro- and microcnemes. Macrocnemes 6 pairs, microcnemes in several cycles. Mesenteries more numerous distally than proximally. Retractors of macrocnemes reniform to more diffuse. Parietal muscles rather weak to weak. Acontia long but slender, with basitrichs and microbasic amastigophors? (penicilli). Cnidom: spirocysts, basitrichs, microbasic amastigophors? and probably microbasic p-mastigophors.
P. exul Annandale 1915
P. minima Panikkar 1939
Definitions and contained taxa are those of Oscar Carlgren as published in 1949 : Kungl Svenska Vetenskapsakadamiens Handlingar, Series 4, Volume 1, Number 1