Paraleptognathia multiserrata ( Hansen, 1913 ) 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 : 38-41

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.5247921
persistent identifier	https://treatment.plazi.org/id/03FB8794-FF99-B336-E927-0EA8FBA2F951
treatment provided by	Felipe
scientific name	Paraleptognathia multiserrata ( Hansen, 1913 )
status	comb. nov.

Treatment

Paraleptognathia multiserrata ( Hansen, 1913) View in CoL new combination ( Figs 16 View FIGURE 16 , 17 View FIGURE 17 )

Synonymy: Akanthophoreus multiserratus Sieg, 1986 View in CoL

Leptognathia multiserrata Hansen, 1913

Material examined: Five individuals. Holotype ZMUC CRU 7430 RV ”Ingolf” St. 4, 64° 07´N 11° 12´W, 237 fm (450 m), one female GoogleMaps , one manca. Other material: ZMB 27518 Faroe Bank Channel St. 11B1 61° 00´N 7° 30´W, 862 m, one female GoogleMaps , 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. 16a, b View FIGURE 16 ): long, about 8.3 times longer than broad. Body length 2.9 to 3.5 mm. Cephalothorax ( Fig. 16a, b View FIGURE 16 ): long, about 1.7 times longer than broad. Pereon ( Fig. 16a, b View FIGURE 16 ): 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. 16a, b View FIGURE 16 ): pleonite one longest, pleonites 2, 3, 4, 5 subequal.

Antennule ( Fig. 16c View FIGURE 16 ): 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. 16d View FIGURE 16 ): 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. 16g View FIGURE 16 ): hoodshaped, with a row of distal setules.

Mandible ( Fig. 17b View FIGURE 17 ): well calcified, pars molaris turned inwards and downwards; lacinia mobilis broad and blunt on distal edge.

Maxillula ( Fig. 17c View FIGURE 17 ): endite with four rows of setules ventrally and one short, two pinnate and five simple terminal spiniform setae.

Maxilla ( Fig. 17d View FIGURE 17 ): triangular, naked.

Labium ( Fig. 17f View FIGURE 17 ): composed of two lobes with two short simple setae distally.

Maxilliped ( Fig. 17h View FIGURE 17 ): endites not fused, basis heartshaped, palpus relatively large.

Epignath ( Fig. 17e View FIGURE 17 ): with no particular feature.

Cheliped ( Fig. 16g View FIGURE 16 , 17a View FIGURE 17 ): 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. 16h View FIGURE 16 ): 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. 16i View FIGURE 16 ): as pereopod 1, except carpus with three spiniform setae.

Pereopod 3 ( Fig. 16j View FIGURE 16 ): as pereopod 2.

Pereopod 4 ( Fig. 16k View FIGURE 16 ): 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. 16l View FIGURE 16 ): as pereopod 4, except basis with two setulose setae, ischium with two simple setae, merus with two spiniform setae.

Pereopod 6 ( Fig. 16m View FIGURE 16 ): as pereopod 4, except basis with two simple setae; merus with two spiniform setae and propodus with four spiniform setae.

Pleopods ( Fig. 16e View FIGURE 16 ): exopod with 18 simple long setae, endopod with eleven simple long setae.

Uropods ( Fig. 16f View FIGURE 16 ): 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) GoogleMaps .

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.