Campylaspis macrosulcata, Gerken, 2012

Gerken, Sarah, 2012, 3524, Zootaxa 3524, pp. 1-124 : 47-51

Campylaspis macrosulcata n. sp.

Figures 26–27

Type material. Holotype subadult female, NIWA 80699 , paratype subadult female, dissected, NIWA 80700 , 44.4862°S, 177.1413°E – 44.4841°S, 177.1416°E, 1235–1239 m, 6 April 2007.

Other material examined. 1 subadult male, 1 manca, NIWA 79345 , 44.4862°S, 177.1413°E – 44.4841°S, 177.1416°E, 1235–1239 m, 6 April 2007 . 8 subadult females, 10 mancae, NIWA 79346 , 44.4862°S, 177.1413°E – 44.4841°S, 177.1416°E, 1235–1239 m, 6 April 2007 . 6 juveniles, NIWA 79347 , 44.4862°S, 177.1413°E – 44.4841°S, 177.1416°E, 1235–1239 m, 6 April 2007 . 3 juveniles, NIWA 79348 , 44.0162°S, 178.5210°E – 44.0143°S, 178.5175°E, 769–771 m, 7 April 2007 . 1 subadult male, 1 manca, NIWA 79349 , 43.9790°S, 179.6298°E – 43.9850°S, 179.6218°E, 529–530 m, 9 April 2007 . 1 subadult female, 1 subadult male, 5 mancae, NIWA 79350 , 43.9790°S, 179.6298°E – 43.9850°S, 179.6218°E, 529–530 m, 9 April 2007 . 2 subadult females, NIWA 79351 , 44.5607°S, 178.4762°W – 44.5592°S, 178.4830°W, 1076–1103 m, 10 April 2007 . 1 subadult female, 1 subadult male, NIWA 79352 , 42.6213°S, 175.9225°E – 42.6203°S, 175.9335°E, 1194–1199 m, 26 April 2007 . 3 subadult females, 1 subadult male, 3 juveniles, NIWA 79353 , 40.1277°S, 170.2140°E – 40.1352°S, 170.2090°E, 803–805 m, 5 June 2007 . 2 mancea, NIWA 79354 , 40.8800°S, 170.8555°E – 40.8883°S, 170.8565°E, 529–534 m, 6 June 2007 .

Diagnosis. Females and subadult males. Carapace with deep sulcus, bounded by strong carinae, dorsal carina bordering sulcus beginning on pseudorostral lobe, proceeding posteriorly and making continuous curve to other pseudorostral lobe, ventral carina bordering sulcus beginning very near anterior point of dorsal carina, proceeding ventrally and posteriorly, also continuous around carapace to other pseudorostral lobe; pseudorostrum not dorsally directed. Carapace, pereonites and pleonites with scattered red chromatophores. Pereonite 1 free only dorsally. Pereopod 2 dactylus normal, terminal seta long. Uropod peduncles 2.5 times length of pleonite 6. Male. Adult unknown.

Description of female.

Holotype subadult female, 7.4 mm, NIWA 80699. Paratype subadult female, 6.5 mm, NIWA 80700. Carapace with deep sulcus, bounded by strong carinae, dorsal carina bordering sulcus beginning on pseudorostral lobe, proceeding posteriorly and making continuous curve to other pseudorostral lobe, ventral carina bordering sulcus beginning very near anterior point of dorsal carina, proceeding ventrally and posteriorly, also continuous around carapace to other pseudorostral lobe; pseudorostrum not dorsally directed; pseudorostral lobes 0.2 times carapace length; eyelobe 0.04 times carapace length; carapace longer than pereonites and pleonites together; pereonite 1 free only dorsally ( Figures 26A–B).

Antennule peduncle article 1 longest, unarmed; article 2 0.9 times article 1 length, with 3 complex pedunculate setae; article 3 0.7 times article 2 length, with complex pedunculate seta; main flagellum of 3 articles, with 1 simple and 1 complex pedunculate setae, broken; accessory flagellum of 1 article, with 3 complex pedunculate setae ( Figure 26C).

Mandible truncate, with 4 microserrate setae medially, lacinia mobilis with 2 cusps ( Figure 26D).

Maxillule with 2 endites; outer endite very broad, with 3 simple and 6 dentate setae terminally, simple seta marginally; inner endite with 2 simple, 2 microserrate and 1 dentate setae; palp with 2 microserrate setae ( Figure 26E).

Maxilla reduced to single endite, with 8 simple setae ( Figure 26F).

Maxilliped 1 basis with 1 simple and 2 hook setae; ischium absent; merocarpus 1.1 times basis length, with 5 simple and 2 plumose setae, lateral margin lined with fine hair-like setae; dactylus with simple seta, margins lined with fine hair-like setae ( Figure 26G).

Maxilliped 2 basis0.7 times length of all other articles together, with 2 simple setae, medial margin lined with fine hair-like setae; ischium absent; merus 0.4 times basis length, with plumose seta; carpus 0.9 times merus length, with lateral margin lined with fine hair-like setae; propodus 0.8 times carpus length, with 1 simple and 1 plumose setae, lateral margin lined with fine hair-like setae, produced as single finger-like projection terminally; dactylus 1.2 times propodus length, produced as 3 teeth terminally, central tooth short, outer pair long and equal in length ( Figure 26H).

Maxilliped 3 basis 1.3 times length of all other articles together, with 2 plumose setae medially, distal corner with 2 plumose setae, medial margin serrate and lined with fine hair-like setae; ischium 0.02 times basis length, produced as large tooth medially; merus 9.0 times ischium length, with 12 simple setae medially and 3 plumose setae laterally; carpus 0.9 times merus length, with 4 simple and 1 plumose setae medially, plumose seta laterally; propodus 1.6 times carpus length, with 2 simple and 3 plumose setae medially, plumose seta laterally; dactylus 0.5 times propodus length, with 3 plumose setae terminally, lateral margin lined with fine hair-like setae; exopod 1.2 times basis length, basal article unarmed, flagellum with plumo-annulate setae ( Figure 27A).

Pereopod 1 basis 0.8 times length of all other articles together, with 3 simple and 3 plumose setae; ischium 0.07 times basis length, with plumose seta; merus 5.8 times ischium length, with 8 simple and 5 plumose setae; carpus 0.9 times merus length, with 7 simple and 3 plumose setae; propodus 0.9 times carpus length, with 8 simple and 3 plumose setae; dactylus 0.7 times propodus length, with 5 simple setae terminally, 2 simple setae; exopod 1.2 times basis length, basal article with simple seta, flagellum with plumo-annulate setae ( Figure 27B).

Pereopod 2 basis 0.6 times length of all other articles together, with 4 simple and 1 plumose setae, medial margin lined with fine hair-like setae; ischium 0.04 times basis length, with plumose seta; merus 6.0 times ischium length, with 3 simple and 1 plumose setae, medial margin lined with fine hair-like setae; carpus 2.2 times merus length, with 3 simple, 5 plumose and 2 microserrate setae; propodus 0.3 times carpus length, with pedunculate seta; dactylus 4.6 times propodus length, with 12 simple setae and plumose seta terminally; exopod 1.4 times basis length, basal article with 2 simple setae, flagellum with plumo-annulate setae ( Figure 27C).

Pereopod 3 basis 1.5 times length of all other articles together, with 12 simple, 1 plumose and 2 complex pedunculate setae; ischium 0.1 times basis length, with 2 simple setae; merus 1.3 times ischium length, with 2 simple and 1 plumose setae; carpus 1.8 times merus length, with 1 simple, 3 plumose and 1 annulate setae; propodus 0.4 times carpus length, with annulate seta; dactylus 0.8 times propodus length, with 3 simple setae terminally ( Figure 27D).

Pereopod 4 basis 1.2 times length of all other articles together, with 2 simple, 3 plumose and 2 complex pedunculate setae; ischium 0.09 times basis length, with simple seta; merus 2.0 times ischium length, with 3 simple and 1 annulate setae; carpus 2.0 times merus length, with 1 simple, 3 plumose and 1 annulate setae; propodus 0.4 times carpus length, with annulate seta; dactylus 0.7 times propodus length, with 2 simple and 1 microserrate setae terminally ( Figure 27E).

Pereopod 5 basis 0.7 times length of all other articles together, unarmed; ischium 0.2 times basis length, with 1 simple and 1 plumose setae; merus 2.0 times ischium length, with plumose seta; carpus 2.0 times merus length, with 1 simple, 2 plumose and 1 annulate setae; propodus 0.3 times carpus length, with annulate seta; dactylus 0.8 times propodus length, with 3 simple setae terminally ( Figure 27F).

Uropod peduncles 2.5 times pleonite 6 length, with 8 simple setae, margins serrate. Uropod endopod uniarticulate, 0.3 times peduncle length, with 3 microserrate setae with single subterminal setule medially, 2 simple and 1 pedunculate setae laterally, terminal seta microserrate with single subterminal setule. Uropod exopod of 2 articles, 1.1 times length of endopod; article 1 0.4 times article 2 length, with pedunculate seta; article 2 with 3 simple setae, terminal seta microserrate with single subterminal setule ( Figure 27G).

Etymology. The species is named macrosulcata for the large sulcus running around the entire carapace, bounded by distinct carinae.

Remarks. The most similar species in New Zealand waters is Campylaspis microsulcata , which also has a deep sulcus bounded by carinae. However, C. microsulcata is smaller than C. macrosulcata , and in C. macrosulcata the carinae that bound the sulcus are continuous around the entire carapace with no transverse carinae connecting them. In C. microsulcata the carinae that bound the sulcus are joined by a pair of transverse carinae posteriorly.