A revision of the genus Paranarthrurella Lang, 1971a (Crustacea: Tanaidacea)

Abstract

The revised genus Paranarthrurella Lang, 1971a includes three species: P. caudata (Kudinova-Pasternak, 1965), the type species of the genus, P. dissimilis (Lang, 1972), and P. voeringi (G.O. Sars, 1877), which were all originally and subsequently classified in other genera (Leptognathia, Cryptocope, Robustognathia and Biarticulata). The genus is defined by a set of specific characters: a long and narrow labrum, a rounded molar, large lacinia mobilis widely separated from incisor; maxillule with eleven spiniform setae distally and numerous simple setae on outer margin; maxilliped with narrow endites and two flat setae on the distal margin; and a chela with well calcified ‘crushing margins’. The genus is most close related to Armatognathia Kudinova-Pasternak, 1987 and it is suggested that both genera may constitute a new family.

Integrative systematics and ecology of a new deep-sea family of tanaidacean crustaceans

“…nov.shortabsentsmallabsentsetapalpate setaepalpate setaeslender1.2shortabsentsubequal1.2current study P. voeringi shortwell developedwell developedsmallsetapalpate setaepalpate setaeslender1.4shortabsentsubequal1.5Jóźwiak et al . 16 , current study…”

“…The general morphological terminology follows that proposed by Jóźwiak et al . 16 . The body length-to-width ratio was assessed dividing a measurement of total body length (see above) and by a measurement the widest part of cephalothorax.…”

“…16 , Budéus 111 21PS72_St 137-512/07/2008Hausgarten, E Fram Strait1273−0.8434.92siltJóźwiak et al . 16 , Beszczynska-Möller & Wisotzki 112 Paranarthrurella sp.1 22IceAGE1_St 115517/09/2011NE Iceland, Norwegian Sea2203.8‒2173.9−0.7534.91very find sandBrix et al . 113,114 Paranarthrurella sp.2 23IceAGE1_St 115517/09/2011NE Iceland, Norwegian Sea2203.8‒2173.9−0.7534.91very find sandBrix et al .…”

“…The revision of Paranarthrurella , grounded in revived Paranarthrurella voeringi (= Tanais voeringi (G.O. Sars, 1877)), has confirmed that this genus, with the cheliped attached to the body via a sclerite, cannot be a member of Anarthruridae or Agathotanaidae 16 . It was also emphasised that a unique character of the chelipeds and the mouthparts is distinct among all currently defined families of Tanaidomorpha.…”

A new genus and new species of Agathotanaidae (Crustacea, Tanaidacea) from West Australia

“…The fifth genus, Paranarthrurella Lang, 1971, which had been previously considered as a member of this family (Larsen and Wilson 2002, Larsen 2005) was recently removed from Agathotanaidae (Jóźwiak et al 2009). …”