Paraleptognathia weddellensis (Sieg, 1986) Guerrero-Kommritz, 2004

Guerrero-Kommritz, Jürgen, 2004, A revision of the genus Paraleptognathia Kudinova-Pasternak, 1981 (Crustacea: Tanaidacea) and description of four new species, Zootaxa 481 (1), pp. 1-63 : 42-45

publication ID

https://doi.org/ 10.11646/zootaxa.481.1.1

publication LSID

lsid:zoobank.org:pub:8B7F424B-FED5-4EEC-955E-1886C252909B

DOI

https://doi.org/10.5281/zenodo.13785706

persistent identifier

https://treatment.plazi.org/id/03FB8794-FF95-B332-E927-0FC8FB90FB31

treatment provided by

Felipe

scientific name

Paraleptognathia weddellensis (Sieg, 1986)
status

comb. nov.

Paraleptognathia weddellensis (Sieg, 1986) View in CoL new combination ( Figs 18 View FIGURE 18 , 19 View FIGURE 19 )

Synonymy: Akanthoporeus weddellensis Sieg, 1986

Material examined: Ten individuals. ZMH K­40600 RV ”Walther Herwig” St. 106, one female , ZMH K­40601 RV ”Polarstern” St. 91, one juvenile male, ZMH K­40602 RV ”Polarstern” St. 145, one female , one neuter, ZMH K­40603 RV ”Polarstern” St. 147, four females (one dissected) , ZMH K­40604 RV ”Polarstern” St. 153, one female , ZMH K­ 40605 RV ”Polarstern” St. 147, one female .

Diagnosis: Cheliped carpal shield well developed, smooth. Propodus of pereopod 1 and 2 with spinules.

Description: non­ovigerous female. Body ( Fig. 18a, b View FIGURE 18 ): long, about 7.5 times longer than broad. Body length 1.4 to 2.8 mm. Cephalothorax ( Fig. 18a, b View FIGURE 18 ): about 1.3 times longer than broad. Pereon ( Fig. 18a, b View FIGURE 18 ): pereonite 1 as long as pereonite 6; pereonite 5 as long as pereonite 3 and longer than 6; pereonite 2 and 4 subequal. Pleon ( Fig. 18a, b View FIGURE 18 ): pleonite 1 and 3 longest, pleonites 2, 4, 5 subequal.

Antennule ( Fig. 18d View FIGURE 18 ): article 1 longest, with one long and two short simple setae; article 2 with one long simple and one short simple setae; article 3 shortest, with two terminal simple setae; article 4 with four terminal setae.

Antenna ( Fig. 18e View FIGURE 18 ): article 1 short, semifused to cephalothorax; article 2 as long as wide, with one dorsal short spiniform seta; article 3 with one simple seta distally; article 4 longest, with two distal simple long, two distal short and one short simple setae at midlength; article 5 with one simple long seta distally; article 6 shortest, with three terminal simple setae.

Labrum ( Fig. 19d View FIGURE 19 ): hood­shaped, with row of setules on the apical margin.

Mandible ( Fig. 19c View FIGURE 19 ): Well calcified; pars molaris bent ventrally; lacinia mobilis spiniform.

Maxillula ( Fig. 19a View FIGURE 19 ): endite with four rows of ventral setules, and two short and seven simple terminal spiniform setae.

Maxilla ( Fig. 19f View FIGURE 19 ): rectangular, naked.

Labium ( Fig. 19e View FIGURE 19 ): of two lobes with one short simple seta at distal outer margin.

Maxilliped ( Fig. 19g View FIGURE 19 ): endites not fused, with no special feature.

Epignath ( Fig. 19b View FIGURE 19 ): with no special feature.

Cheliped ( Fig. 18h View FIGURE 18 ): basis as long as carpus; merus with ventral simple seta; carpus with one ventral and one dorsal simple setae, carpal shield well developed rounded; propodus smooth, with three teeth at cutting edge; dactylus smooth.

Pereopod 1 ( Fig. 18i View FIGURE 18 ): coxa naked; basis about three times as long as broad, with one setulose seta; ischium short, with one simple seta; merus as long as carpus, with one spiniform seta; carpus with two spiniform setae; propodus with a row of ventral spines and a spiniform distal seta; dactylus smooth; unguis as long as dactylus.

Pereopod 2 ( Fig. 18j View FIGURE 18 ): as pereopod 1, except basis without setae; carpus with three spiniform setae; propodus with a short simple seta.

Pereopod 3 ( Fig. 18k View FIGURE 18 ): as pereopod 2, except propodus smooth.

Pereopod 4 ( Fig. 18l View FIGURE 18 ): basis about three times as long as wide, naked; ischium short, with two simple setae; merus with two spiniform setae; carpus with three spiniform setae; propodus with three spiniform setae and a terminal spine; dactylus with no special features.

Pereopod 5 ( Fig. 18m View FIGURE 18 ): as pereopod 4, except basis with one simple seta; ischium with one simple setae.

Pereopod 6 ( Fig. 18n View FIGURE 18 ): as pereopod 4, except propodus with four spiniform setae.

Pleopods ( Fig. 18g View FIGURE 18 ): exopod with ten long simple setae; endopod with nine long simple setae.

Uropods ( Fig. 18f View FIGURE 18 ): exopod half the length of article one of endopod. Article 1 with one simple seta; article 2 with two terminal simple setae. Article 1 of endopod naked, article 2 with four terminal setae.

Juvenile males body length 2.1 mm. Antennule ( Fig 18c View FIGURE 18 ): first article longest, with one simple seta; article 2 naked; article 3 with one long distal seta; article 4 shortest, with two distal setae; article 5 with three terminal setae.

Manca body length 1.0 mm.

Distribution: Weddell Sea, Elephant Island, South Orkney Island, King George Island.

Remarks: among the representatives of Paraleptognathia of the southern oceans this species has the biggest carpal shield on the cheliped of the region.

ZMH

Zoologisches Museum Hamburg

RV

Collection of Leptospira Strains

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Tanaidacea

Family

Akanthophoreidae

Genus

Paraleptognathia

Loc

Paraleptognathia weddellensis (Sieg, 1986)

Guerrero-Kommritz, Jürgen 2004
2004
Loc

Akanthoporeus weddellensis

Sieg 1986
1986
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