72 



R. HUYS AND J.M. GEE 



longifurca to a new genus Bathypsammis which is closely 

 related to Psammis. 



Genus Psammis Sars, 1910 



With the removal of P. longifurca to Bathypsammis gen. 

 nov., the number of species currently allocated to the genus 

 Psammis is reduced to four: P. longisetosa Sars, 1910; P. 

 borealis Klie, 1939; P. kliei Smirnov, 1946; and, P. longipes 

 Becker, 1974. 



(i) Psammis borealis Klie, 1939 



This species was first briefly diagnosed in 1939 from material 

 collected in deep water near Iceland. A more extensive 

 description, accompanied by illustrations, was published in 

 1941. Any justification for placing this species in Psammis is 

 missing from Klie's (1939, 1941) papers, providing instead a 

 large number of fundamental differences with the type spe- 

 cies P. longisetosa. We have re-examined Klie's type material 

 of P. borealis (Cop. 211-215; 4 99, 1 cf, all dissected on 

 slides; Zoologisches Museum der Universitat Kiel). The slide 

 of the male is somewhat confusing in that there seems to be 3 

 mounted antennules which do not show male characteristics 

 and only part of one which does have the features of a male. 

 Further, the limbs on this slide show no sexual dimorphism 

 on either P2 or P3. The genital somite is also missing and the 

 only appendage that differs from the slides of the females is 

 the P5. The fifth legs of both sexes are exactly as drawn in 

 Figs. 4 & 6 in Klie (1941). However, based on the mouthparts 

 and the setation of the female thoracopods, and pending 

 more information on swimming leg sexual dimorphism, we 

 propose to retain this species within the Paranannopidae as 

 species incertae sedis. It should be noted here that the 

 specimens labelled P. borealis and deposited in the Smithso- 

 nian Institution (reg. no. 00231018) by Prof. Dr B.C. Coull 

 are not the same genus as that of Klie (1939). This material (2 

 99) collected from the North Carolina continental shelf [this 

 record is not listed in Coull (1971)] closely resembles 

 Pseudotachidius similis T. Scott, 1902 and P. minutus ltd, 

 1983. 



(ii) Psammis kliei Smirnov, 1946 



We have been unable to discover the type material of P. kliei 

 described by Smirnov (1946) from Henrietta Island (New 

 Siberian Islands, East Siberian Sea). However, the recent 

 recovery of a specimen from Spitsbergen which we believe is 

 referable to this species, indicates that it should be placed in 

 another genus close to Psammis and Danielssenia. This will 

 be discussed further in a future paper on the Paranannopidae 

 of Spitsbergen (Gee & Huys, in prep.). 



(iii) Psammis longipes Becker, 1974 



Material examined. Holotype 9 dissected on 2 slides 

 (Becker collection; Zoologisches Museum der Universitat 

 Kiel, reg. no. 1009-1010); Peru Trough, R/V Anton Bruun 

 Sta. 179, 12°03'S 78°45'W, depth 5000 m, leg. W. Noodt. 



This species is known from the type locality only. The 

 following redescription (Figs. 19-20) is confined to structures 

 that were misinterpreted or not well illustrated in Becker's 

 (1974) original description: 



Mandible (Figs. 19A-B). Gnathobase with multicuspidate, 

 elongate teeth descreasing in size dorsally, and with 2 pinnate 



setae near the distal dorsal corner; coxa with large spinules 

 around the base of the palp. Basis with 3 setae, middle one 

 with shorter spinules. Endopod only slightly longer than 

 exopod, with 1 lateral and 3 apical setae; exopod with 1 

 lateral and 2 apical setae. 



Maxillule (Fig. 19C-D). Praecoxal arthrite with 9 pinnate 

 spines and 1 tubular seta around the distal margin and with 2 

 geniculate tubular setae on the anterior surface. Coxal endite 

 specialized; armature consisting of 3 tubular setae and 3 

 spines; largest (= anterior) spine with broad base, a comb of 

 flat spinules along the inner margin and ending in a tubular 

 extension; middle spine also swollen at base and with fan of 

 non-articulating flat spinules arranged around the apex; pos- 

 terior spine with large spinule. Basal endite with 3 plumose 

 setae and 1 short spine with tubular extension. Endopod and 

 exopod with 3 setae each. 



Maxilla (Fig. 19E). Praecoxal endite with 2 pinnate spines, 

 distal one with tubular extension. Coxal endites with 2 spines 

 and 1 seta each, distal spine and posterior seta with tubular 

 extension. Allobasis with 2 articulating claws and a tubular 

 seta on either anterior and posterior surface. Endopod with 1 

 simple and 3 tubular setae. 



Maxilliped (Fig. 19F) as described by Becker (1974) except 

 that the endopodal claw bears an accessory seta. 



The armature formula given by Becker for the swimming 

 legs is erroneous on two points: P3 enp-2 has only 1 inner 

 seta, the proximal one shown in his figure being an enlarged 

 spinule; P3-P4 exp-3 have and extra element distally, repre- 

 senting the reduced inner terminal seta (Fig. 20A-B). 



Fifth leg (Fig. 20C). An incomplete furrow on the posterior 

 surface marks the original proximal margin of the endopodal 

 lobe. The 3 distal setae of this lobe are multipinnate. 



Genital field (Fig. 20D) with small copulatory pore leading 

 via linear duct to bilobate seminal receptacle largely located 

 anterior to genital slit. P6 armature represented by pinnate 

 seta and 2 minute spinules (vestigial setae?). 



Hyaline frill of all body somites finely dentate; pseudoper- 

 culum well developed (Fig. 20E). Pattern of caudal ramus 

 setae as in Fig. 20E. 



(iv) Psammis longisetosa Sars, 1910 



Material examined. 



— Zoologisk Museum, Oslo: (a) G.O. Sars collection: 



F20223: 1 9 (in alcohol) and 1 ($ (dissected); collected 



from Farsund (type locality), Norway; 



F20224: vial containing 19 99 and 6 Cfcf; collected from 



RisOr, Norway; 



(b) F20929: 4 99 (2 on slides, 2 in alcohol), 3 cfcf (1 on 



slide, 2 in alcohol); collected by J. A. Berg, deposited by J.M. 



Gee, from Bjornehodebukta (59°42.8'N, 10°32.2'E), 



Oslofjord, 35 m depth, June 1984; 



— The Natural History Museum: 1992.1096: 1 d" (in 

 alcohol), 1 9 ( on 6 slides), 1 cf prosome (on 7 slides); 

 collected by R. Huys, from Frierfjord-Langesundfjord, 55 m 

 depth, spring 1985. 



The original descriptions of P. longisetosa given by Sars 

 (1910, 1921) have been supplemented since by a complete 

 redescription by Gee (1988a). The single female collected 

 from Raunefjorden and figured by Por (1965) in all probabil- 

 ity does not belong to P. longisetosa. In addition to the 

 differences in the shape and armature of the P5 mentioned by 

 Por, substantial discrepancies appear from his illustrations of 

 the PI (relative proportions of endopodal segments), last 



