Paraleptognathia multiserratoides Guerrero-Kommritz 2004, sp. n.

• Main Author: Guerrero-Kommritz, Jürgen
• Format: Text
• Language: unknown
• Published: Zenodo 2004
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Malacostraca; Tanaidacea; Akanthophoreidae; Paraleptognathia; Paraleptognathia multiserratoides; Antarctic; The Antarctic; Antarctic Peninsula; King George Island; Elephant Island; Seta; Antarc*; North Atlantic; South Atlantic Ocean
• Online Access: https://dx.doi.org/10.5281/zenodo.5247925; https://zenodo.org/record/5247925

Paraleptognathia multiserratoides sp. n. (Fig. 20, 21) Material examined: 66 individuals. Holotype ZMH K­40606, RV ”Meteor” St. 66, one female. Paratypes ZMUC CRU 3960 RV ”Polarstern” St. 139, five females, ZMB 27519 RV ”Polarstern” St. 154, four females, ZMH K­40607 RV ”Meteor” St. 21, one female, ZMH K­40608 RV ”Meteor” St. 27, one female, ZMH K­40609 RV ”Meteor” St. 50, seven females (one dissected), ZMH K­40610 RV ”Meteor” St. 66, one female, ZMH K­ 40611 RV ”Meteor” St. 96, four females, one juvenile male, one neuter, ZMH K­40612 RV ”Walther Herwig” St. 138, one female, ZMH K­40613 RV ”Polarstern” St. 91, one female, ZMH K­40614 RV ”Polarstern” St. 143, one female, ZMH K­40615 RV ”Polarstern” St. 145, 16 females, four neuters, ZMH K­40616 RV ”Polarstern” St. 147, 13 females, two neuters, ZMH K­40617 RV ”Polarstern” St. 148, two females. Diagnosis: Cheliped with crenulation on carpal shield, on dorsal and lateral propodus, and on dactylus. Pereopod 4 to 6 with spinules on propodus. Description: non­ovigerous female. Body (Fig. 20a, b): long, about 10 times as long as wide. Body length 1.4 to 3.4 mm. Cephalothorax (Fig. 20a, b): about 1.5 times longer than broad, oval shaped. Pereon (Fig. 20a, b): pereonite 1 shortest; pereonite 6 longer than 1, shorter than 5; pereonite 2 longer than 5 and subequal to 4; pereonite 3 longest. Pleon (Fig. 20a, b): pleonites of equal length; pleotelson rounded. Antennule (Fig. 20c): article 1 longest, with two distal setae; article 2 with one long simple seta; article 3 shortest, with one distal simple seta; article 4 with five terminal setae. Antenna (Fig.20d): article 1 short, semifused to cephalothorax; article 2 as long as wide, with one short spiniform seta dorsally; article 3 with one simple seta distally; article 4 longest, with two distal simple long, two distal short and two short simple setae at midlength; article 5 with one simple long seta distally; article 6 shortest, with three terminal simple setae. Labrum (Fig. 21d): hood­shaped, smooth. Mandible (Fig. 21c): well calcified; pars molaris bent ventrally; lacinia mobilis spiniform. Maxillula (Fig. 21a): endite with three rows of ventral setules and seven rows of dorsal setules; nine simple terminal spiniform setae. Maxilla (Fig. 21f): rectangular, with no special features. Labium (Fig. 21e): composed of two triangular lobes, naked. Maxilliped (Fig. 21g): with no special features. Epignath (Fig. 21b): as long as Maxillula, with no special feature. Cheliped (Fig. 20g): basis as long as carpus; merus with one ventral simple seta; carpus with one ventral and one dorsal simple setae; carpal shield weak, with a prominent row of tubercles on ventral margin; propodus with very prominent row of tubercles ventrally, row of tubercles dorsally near insertion of dactylus, with three teeth on cutting edge; dactylus with very prominent row of tubercles dorsally. Pereopod 1 (Fig. 20h): coxa naked; basis 2.5 times as long as broad, with one simple short and one setulose setae; ischium short, with one simple seta; merus as long as carpus, with one spiniform seta; carpus with two spiniform setae; propodus with one terminal spine and one terminal short spiniform seta; dactylus smooth; unguis short and sharp. Pereopod 2 (Fig. 20i): as pereopod 1, except basis with only one setulose seta, carpus with two spinules ventrally. Pereopod 3 (Fig. 20j): as pereopod 1, except basis with only one setulose seta, carpus with three spiniform setae. Pereopod 4 (Fig. 20k): basis three times as long as broad, with one simple seta; ischium short, naked; merus with two spiniform spetae; carpus longer than merus, with three spiniform setae; propodus with a row of dorsal spinules, terminal spine and three terminal spiniform setae; dactylus with no special features. Pereopod 5 (Fig. 20l): as pereopod 4, except carpus with a row of spinules ventrally. Pereopod 6 (Fig. 20m): as pereopod 4, except ischium with simple seta; carpus and propodus have four spiniform setae. Pleopods (Fig. 20f): exopod with 14 simple long setae; endopod with 14 simple long setae. Uropods (Fig. 20e): exopod almost as long as endopod article 1. Exopod article 1 with two distal simple setae; article 2 with two terminal simple setae. Endopod article 1 with one distal simple seta; article 2 with two terminal simple setae. Type locality: Antarctic Peninsula, RV ”Meteor” St. 66, 64° 28.5´S 64° 45.0´W, 320 m. Etymology: the latin termination ­oides refers to the similarity to the species P. multiserrata . Distribution: this species occurs in the Antarctic Peninsula, Elephant Island, and King George Island. Remarks: this species resembles P. multiserrata . The differences are in the cheliped, the carpal shield in P. multiserratoides is less developed than in P. multiserrata , the propodus of P4–P 6 in P. multiserratoides are armed in dorsal spinules while they are smooth in P. multiserrata . The crenulation on the cheliped is more prominent in P. multiserratoides than in P. multiserrata . Moreover Paraleptognathia multiserrata occurs in the North Atlantic Ocean while P. multiserratoides occurs in the South Atlantic Ocean. : Published as part of Guerrero-Kommritz, Jürgen, 2004, A revision of the genus Paraleptognathia Kudinova-Pasternak, 1981 (Crustacea: Tanaidacea) and description of four new species, pp. 1-63 in Zootaxa 481 (1) on pages 45-49, DOI: 10.11646/zootaxa.481.1.1, http://zenodo.org/record/5030070