Paraleptognathia benguela 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 benguela
materials_examined
Material examined: 18 individuals. Holotype ZMH K 40618 RV ” Meteor ” 48 St. 340, two females. Paratypes ZMB 27520, RV ” Meteor ” 48 St. 346, three females, ZMUC CRU 3961 RV ” Meteor ” 48 St. 325, two females, ZMH K 40619 RV ” Meteor ” 48 St. 340, two females, ZMH K 40620 RV ” Meteor ” 48 St. 345, one female, ZMH K 40621 RV ” Meteor ” 48 St. 344, three females, ZMH K 40622 RV ” Meteor ” 48 St. 340, one juvenile male, ZMH K 40623 RV ” Meteor ” 48 St. 348, one female, ZMH K 40624 RV ” Meteor ” 48 St. 325, one female, ZMH K 40625 RV ” Meteor ” 48 St. 338, one female, ZMH K 40626 RV ” Meteor ” 48 St. 348, one female, ZMH K 40627 RV ” Meteor ” 48 St. 345, one female. Diagnosis: Carpal shield well developed. Pereopod 1, 2, 3 with spinules on merus, carpus and propodus. Description: nonovigerous female. Body (Fig. 22 a, b): long, about 7.3 times longer than broad. Body length 1.5 to 4.0 mm. Cephalothorax (Fig. 22 a, b): about 1.3 times longer than broad. Pereon (Fig. 22 a, b): pereonite 1 as long as pereonite 6; pereonite 5 as long as pereonite 2 and longer than 6, pereonite 4 longer than 2 and shorter than 3; pereonite 3 longest. Pleon (Fig. 22 a, b): pleonites of equal length, pleotelson with pointed apex. Antennule (Fig. 22 c): article 1 longest, with one long and three short setae; article 2 with one long simple and two short simple setae; article 3 shortest, with two terminal simple setae; article 4 with five terminal setae. Antenna (Fig. 22 d): article 1 short, semifused to cephalothorax; article 2 as long as wide, with one short spiniform seta dorsally; article 3 with one simple distal seta; article 4 longest, with two distal simple long, two distal short and one short simple setae at midlength; article 5 with one simple long distal seta; article 6 shortest, with five terminal simple setae. Labrum (Fig. 23 d): hoodshaped, with row of setules on lateral margins. Mandible (Fig. 23 c): well calcified; pars molaris bent ventrally; lacinia mobilis spiniform and blunt. Maxillula (Fig. 23 a): endite with three rows of ventral setules, four rows of dorsal setules, with one simple and eight pinnate terminal spiniform setae. Maxilla (Fig. 23 f): rectangular, with a row of setules on distal edge. Labium (Fig. 23 e): composed of two triangular lobes with row of setules at distal edge. Maxilliped (Fig. 23 g): endites not fused, with a distal tubercle, basis tongshaped. Epignath (Fig. 23 b): with no special features. Cheliped (Fig. 22 g): basis as long as carpus; merus with ventral simple seta; carpus with a ventral and a dorsal simple setae; carpal shield well developed, about one third of carpus; propodus smooth, with two teeth at cutting edge; dactylus smooth. Pereopod 1 (Fig. 22 h): coxa naked; basis twice as long as broad, with two simple setae; ischium short, with one simple seta; merus with a ventral and a dorsal row of spinules and one spiniform seta; carpus as long as merus, with a ventral and a dorsal row of spinules, and two spiniform setae; propodus with ventral and dorsal row of spinules, one terminal spine and terminal short spiniform seta; dactylus as long as propodus. Pereopod 2 (Fig. 22 i): as pereopod 1, except basis naked, merus and propodus lack dorsal rows of spinules, carpus with three spiniform setae. Pereopod 3 (Fig. 22 j): as pereopod 2, except carpus lacks dorsal rows of spinules, and only two spiniform setae. Pereopod 4 (Fig. 22 k): basis three times as long as broad, naked; ischium short, with one simple seta; merus with two spiniform setae; carpus with three spiniform setae; propodus with two terminal spiniform setae; dactylus with no special features. Pereopod 5 (Fig. 22 l): as pereopod 4, except basis with three simple setae; merus with two spiniform setae, propodus with three terminal spiniform setae, dactylus with larger spinules as in pereopod 4 and 6. Pereopod 6 (Fig. 22 m): as pereopod 4, except propodus with four terminal spiniform setae. Pleopods (Fig. 22 f): exopod with eight simple long setae, endopod with seven simple long setae. Uropods (Fig. 22 e): exopod half the length of article 1 of endopod. Exopod article 1 with one simple seta; article 2 with one terminal simple seta. Article 1 of endopod with two simple setae; article 2 with six terminal setae. Juvenile males body length 3.32 mm. Mancas up to 1.5 mm. Type locality: South Atlantic Ocean, Angola Basin, RV ” Meteor ” 48 St. 340 18 ° 77.3´S 04 ° 41.2´E – 18 ° 19.4´S 04 ° 41.9´E, 5395 m. Etymology: the name refers to the Benguela Current that flows on top of the Angola Basin. Distribution: South Atlantic Ocean, Angola Basin. Remarks: this species resembles P. bacescui but the presence of spinules on the merus and carpus of P 1 to P 3 on P. benguela distinguish them. A detailed analysis of the type of P. bacescui is needed to define these two species more properly.