Paraleptognathia multiserrata (Hansen 1913) Guerrero-Kommritz 2004
- Dataset
- A revision of the genus Paraleptognathia Kudinova-Pasternak, 1981 (Crustacea: Tanaidacea) and description of four new species
- Rank
- SPECIES
- Published in
- Guerrero-Kommritz, Jürgen (2004): A revision of the genus Paraleptognathia Kudinova-Pasternak, 1981 (Crustacea: Tanaidacea) and description of four new species. Zootaxa 481 (1): 1-63, DOI: 10.11646/zootaxa.481.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.481.1.1
Classification
- kingdom
- Animalia
- phylum
- Arthropoda
- class
- Malacostraca
- order
- Tanaidacea
- family
- Akanthophoreidae
- genus
- Paraleptognathia
- species
- Paraleptognathia multiserrata
materials_examined
Material examined: Five individuals. Holotype ZMUC CRU 7430 RV ” Ingolf ” St. 4, 64 ° 07´N 11 ° 12´W, 237 fm (450 m), one female, one manca. Other material: ZMB 27518 Faroe Bank Channel St. 11 B 1 61 ° 00´N 7 ° 30´W, 862 m, one female, ZMUC CRU 3959, Faroe, Bordoy Island, Kalksvig Indlobit Til, 20 – 25 m, 22. 9.1926, two females. Diagnosi s: Cheliped carpal shield with crenulation, propodus and dactylus with crenulation. Description: nonovigerous female. Body (Fig. 16 a, b): long, about 8.3 times longer than broad. Body length 2.9 to 3.5 mm. Cephalothorax (Fig. 16 a, b): long, about 1.7 times longer than broad. Pereon (Fig. 16 a, b): pereonite 1 as long as pereonite 6 and shorter than pereonite 5; pereonite 2, 3, and 4 of equal length and longer than 5. Pleon (Fig. 16 a, b): pleonite one longest, pleonites 2, 3, 4, 5 subequal. Antennule (Fig. 16 c): article 1 longest, with one simple distal and three short setae; article 2 with one long and one short distal setae; article 3 shortest, with one distal simple seta; article 4 with five terminal setae. Antenna (Fig. 16 d): article 1 short, semifused to cephalothorax; article 2 as long as broad; article 3 with one dorsal simple seta; article 4 with two terminal long simple and two short setae; article 5 with two terminal simple setae; article 6 shortest, with four terminal simple setae. Labrum (Fig. 16 g): hoodshaped, with a row of distal setules. Mandible (Fig. 17 b): well calcified, pars molaris turned inwards and downwards; lacinia mobilis broad and blunt on distal edge. Maxillula (Fig. 17 c): endite with four rows of setules ventrally and one short, two pinnate and five simple terminal spiniform setae. Maxilla (Fig. 17 d): triangular, naked. Labium (Fig. 17 f): composed of two lobes with two short simple setae distally. Maxilliped (Fig. 17 h): endites not fused, basis heartshaped, palpus relatively large. Epignath (Fig. 17 e): with no particular feature. Cheliped (Fig. 16 g, 17 a): basis as long as carpus; merus with one ventral simple seta; carpus with two ventral and one dorsal setae, one tubercle near insertion of chela; carpal shield moderately developed, with row of tubercles in the lower margin; propodus with three dorsal tubercles near insertion of dactylus, and a row of lateral tubercles at ventral setae level, three teeth at cutting edge; dactylus with a row of tubercles on the dorsal margin. Pereopod 1 (Fig. 16 h): coxa naked; basis about three and a half times longer than broad; ischium short, with one simple seta; merus with one spiniform seta; carpus longer than merus, with two spiniform setae; propodus with one terminal short spiniform seta; dactylus smooth; unguis as long as dactylus. Pereopod 2 (Fig. 16 i): as pereopod 1, except carpus with three spiniform setae. Pereopod 3 (Fig. 16 j): as pereopod 2. Pereopod 4 (Fig. 16 k): basis about three and a half times longer than wide; ischium short, with a short simple seta; merus with one spiniform seta; carpus with three spiniform setae; propodus with three terminal spiniform setae; dactylus short; unguis as long as dactylus. Pereopod 5 (Fig. 16 l): as pereopod 4, except basis with two setulose setae, ischium with two simple setae, merus with two spiniform setae. Pereopod 6 (Fig. 16 m): as pereopod 4, except basis with two simple setae; merus with two spiniform setae and propodus with four spiniform setae. Pleopods (Fig. 16 e): exopod with 18 simple long setae, endopod with eleven simple long setae. Uropods (Fig. 16 f): Exopod less than half as long as article 1 of endopod. Exopod article 1 with one long distal seta; article 2 with one long terminal seta. Endopod article 1 with two distal short setae; article 2 with four terminal setae. Manca body length 1.5 mm. Type locality: East of Iceland, RV ” Ingolf ” St. 4, 64 ° 07´N 11 ° 12´W, 237 fm (450 m). Distribution: this species occurs in the North Atlantic from the Faroe Islands to the east of Iceland. Remarks: this species can be easily distinguish from all other Paraleptognathia species from the North Atlantic by a well developed carpal shield on the cheliped with a prominent crenulation as well as a strong crenulation on the propodus.