Chauliopleona hastata ( Hansen, 1913 ) Guerrero-Kommritz, 2005

Guerrero-Kommritz, Jürgen, 2005, Review of the genus Chauliopleona Dojiri and Sieg, 1997 (Crustacea, Peracarida, Tanaidacea) and description of three new species, Journal of Natural History 39 (16), pp. 1177-1210 : 1191-1195

publication ID	https://doi.org/ 10.1080/0022293042000197586
persistent identifier	https://treatment.plazi.org/id/03A887A3-0F12-FFB4-EB3D-FCD59157B752
treatment provided by	Carolina
scientific name	Chauliopleona hastata ( Hansen, 1913 )
status	comb. nov.

Treatment

Chauliopleona hastata ( Hansen, 1913) View in CoL new combination

( Figures 7 View Figure 7 , 8 View Figure 8 )

Leptognathia hastata Hansen, 1913 .

Leptognathia hastata: Stephensen 1932: 348 .

Material examined

SYNTYPE: ZMUC CRU-6682 , Ingolf Expedition, station 125, 68 ° 089N, 16 ° 029W, 1373 m . Other material: 19 non-ovigerous females, ZMH K-40229, Ark XI-2, RV Polarstern, Stat 37-16, 78 ° 58.259N, 07 ° 39.429W, 188 m, 78 ° 58.339N, 07 ° 40.059W, 191 m, 30 September 1995, EBS GoogleMaps .

Diagnosis

Cheliped well developed, strong, carpal shield well developed with proximal ventral lobes, chela strong.

Redescription

Body ( Figure 7 View Figure 7 a–c). About seven times as long as broad, cylindrical, 1.88–5.06 mm in length, cuticle strong. Cephalothorax about 1.4 times as long as broad, ventral groove surrounding cheliped insertion. Pereonite 2 longest, 6 and 1 equal and shortest, 4 and 5 of equal length. Pleon as long as cephalothorax. Pleotelson pentagonal.

Antennule ( Figure 7d View Figure 7 ). Article 1 longest, with one distal simple seta. Article 2 as long as 4 with simple terminal seta. Article 3 shortest with simple seta. Article 4 with three long simple setae, one short simple seta and one aesthetasc.

Antenna ( Figure 7e View Figure 7 ). Article 1 very short. Article 2 square, with one simple seta. Article 3 with small terminal simple seta. Article 4 with three small simple setae. Article 5 with simple long terminal seta. Article 6 with three long simple setae, one short simple seta and one aesthetasc.

Labrum ( Figure 8a View Figure 8 ). Hood-like, with fine marginal setules.

Mandible ( Figure 8b View Figure 8 ). Well calcified and sclerotized on incisive margins, molar process developed, bearing about 10 distal spinules.

Maxillule ( Figure 8c View Figure 8 ). Endite setulated, with four setulated, three simple and one short terminal spines. Palp with two long terminal setae.

Maxilla ( Figure 8d View Figure 8 ). Rectangular, with one row of setules distally.

Labium ( Figure 8f View Figure 8 ). Composed of two pentagonal lobes.

Maxilliped ( Figure 8e View Figure 8 ). Endites with one blunt spine and two simple setae. First palp article naked. Second article with one outer and three or four curved long inner setae. Third article with three inner setae. Fourth article with four terminal setae.

Epignath ( Figure 8g View Figure 8 ). Falciform.

Cheliped ( Figures 7f View Figure 7 , 15b View Figure 15 ). Basis as long as carpus, 50% of basis proximal to attachment. Merus triangular, with one simple seta. Carpus about 1.1 times as long as broad. Carpal shield very well developed. One rounded protuberance near insertion of propodus, two lobes under carpal shield, and one ventral and one dorsal simple seta. Propodus twice as long as broad, with four teeth on fixed finger and two ventral and three dorsal setae. Two dorsal blunt lobes on top of finger insertion. Dactylus curved with three small ventral teeth, smooth.

Pereopod 1 ( Figure 8h View Figure 8 ). Coxa without seta. Basis with one simple seta. Ischium with one simple seta. Merus with one long spiniform pinnate seta. Carpus with one long spiniform seta and about six ventral spinules. Propodus with about 24 small ventral spinules and one short spiniform seta. Dactylus short, about as long as unguis. Unguis pointed.

Pereopod 2 ( Figure 8i View Figure 8 ). As pereopod 1 except basis naked, merus with one spiniform seta. Carpus with three fine ventral spines and one long spiniform pinnate and two short simple setae. Propodus with about 15 small ventral spinules and one short spiniform seta.

Pereopod 3 ( Figure 8j View Figure 8 ). As pereopod 2.

Pereopod 4 ( Figure 8k View Figure 8 ). Basis with one feathered and two small simple setae. Ischium with two simple setae. Merus triangular with two long spiniform seta. Carpus with three long spiniform setae. Propodus with three long spiniform terminal setae. Dactylus with ventral groove bordered by very fine proximally directed spinules. Unguis short and pointed.

Pereopod 5 ( Figure 8m View Figure 8 ). As pereopod 4, except ischium with one seta. Pereopod 6 ( Figure 8l View Figure 8 ). As pereopod 5, except ischium with one seta and propodus with four terminal spiniform setae.

Pleopods ( Figure 7g View Figure 7 ). Basal article rhomboidal. Endopod and exopod shaped like a tongue with fine terminal setules.

Uropods ( Figure 7h View Figure 7 ). Basal article rectangular. Exopod shorter than article 1 of endopod, composed of two articles: article 1 with one short terminal simple seta, article 2 with one long simple terminal seta. Endopod of two articles equal in length: article 1 naked, article 2 with four terminal simple setae.

Type locality

68 ° 089N, 16 ° 029W, 1373 m, station 125, Ingolf Expedition.

Remarks

This description is based on the type material and on animals from north Greenland. This species can be easily differentiated from C. armata by the form of the carpal shield which is very pronounced, as well as the chela, which is stronger and heavier in C. hastata . This is a valid species, and no synonym of C. armata or C. amdrupii . Chauliopleona hastata can be found in very cold waters from north Greenland, C. armata only in waters from south Greenland or Iceland in depths between 188 and 1373 m.