Campylaspis microsulcata, Gerken, 2012

Gerken, Sarah, 2012, 3524, Zootaxa 3524, pp. 1-124 : 51-55

Campylaspis microsulcata n. sp.

Figures 28–29

Type material. Holotype ovigerous female, NIWA 80671 , paratype ovigerous female, dissected, NIWA 80672 , 40.1277°S, 170.2140°E – 40.1352°S, 170.2090°E, 803–805 m, 5 June 2007.

Other material examined. 6 specimens, NIWA 79307 , 43.5212°S, 178.6203°W – 43.5228°S, 178.6315°W, 424–425 m, 18 April 2007 . 1 ovigerous female, NIWA 79309 , 42.6213°S, 175.9225°E – 42.6203°S, 175.9335°E, 1194–1199 m, 26 April 2007 . 4 subadult females, 1 subadult male, 6 mancae, NIWA 79306 , 44.0162°S, 178.5210°E – 44.0143°S, 178.5175°E, 769–771 m, 7 April 2007 . 2 specimens, NIWA 79306 , 44.4862°S, 177.1413°E – 44.4841°S, 177.1416°E, 1235–1239 m, 6 April 2007 .

Diagnosis. Females and subadult males. Carapace with distinct deep sulcus, with lateral carinae outlining sulcus with transverse carinae connecting them posteriorly, lateral carinae anterior ends not close, both ventral and dorsal lateral carinae with dorsally directed peak at posterior midline; pseudorostrum weakly dorsally directed. Carapace, pereonites and pleonites with scattered red chromatophores. Pereonites 1–5 entirely free. Pereopod 2 dactylus normal, terminal seta long. Uropod peduncles 2.4 times length of pleonite 6. Male. Adult unknown.

Description of female.

Holotype ovigerous female, 4.7 mm, NIWA 80671. Paratype ovigerous female, 6.0 mm, NIWA 80672. Carapace with distinct deep sulcus, with lateral carinae outlining sulcus with transverse carinae connecting them posteriorly, lateral carinae anterior ends not close, both ventral and dorsal lateral carinae with dorsally directed peak at posterior midline, anterior margin of carapace serrate; pseudorostrum weakly dorsally directed, pseudorostral lobes 0.3 times length of carapace; eyelobe 0.05 times length of carapace. Pereonites 1–5 free, pereonites 1–2 with bifurcated lappet dorsally. Pleonites rectangular in cross section, not rounded ( Figures 28A–B).

Antennule peduncle article 1 longest, with simple seta, margins lined with fine hair-like setae; article 2 0.8 times article 1 length, with 1 simple and 1 complex pedunculate setae; article 3 0.9 times article 2 length, unarmed; main flagellum of 3 articles, with 2 aesthetascs and pedunculate seta; accessory flagellum of 1 article, with 2 simple and 2 complex pedunculate setae ( Figure 28C).

Antenna 0.5 times length of peduncle of antennule, of 2 articles, with simple seta terminally ( Figure 28D).

Mandible truncate, with 4–5 microserrate setae medially, lacinia mobilis with 4 cusps ( Figure 28E).

Maxillule with 2 endites; outer endite broad, with 8 dentate setae; inner endite with 2 simple, 2 microserrate and 1 tricuspid setae; palp with 3 microserrate setae ( Figure 28F).

Maxilla reduced to single endite, with 4 simple and 4 single subterminal setule setae ( Figure 28G).

Maxilliped 1 basis with 3 simple and 2 hook setae; merocarpus 1.2 times length of basis, with 7 simple and 2 plumose setae, all margins lined with fine hair-like setae; dactylus with simple seta terminally, margins lined with fine hair-like setae ( Figure 28H).

Maxilliped 2 basis 0.8 times length of all other articles together, with plumose seta; ischium absent; merus 0.4 times basis length, unarmed; carpus 0.3 times merus length, with pappose seta; propodus 2.8 times carpus length, terminal margin produced as single long projection; dactylus 0.8 times propodus length, produced as 3 teeth, all subequal in length ( Figure 28I).

Maxilliped 3 basis 1.2 times length of all other articles together, with plumose seta medially, 1 simple and 2 plumose setae on distal corner, medial margin produced as 4 teeth; ischium 0.02 times basis length, medial margin produced as 2 teeth; merus 18 times ischium length, with 5 simple setae medially, plumose seta laterally; carpus 0.4 times merus length, with plumose seta, medial margin produced as 3 teeth; propodus 1.6 times carpus length, with 1 simple and 2 plumose setae medially, plumose seta laterally, medial margin produced as 3 teeth; dactylus 0.5 times propodus length, with 2 simple setae terminally; exopod equal to basis length, basal article unarmed, flagellum with plumo-annulate setae ( Figure 29A).

Pereopod 1 basis 1.2 times length of all other articles together, with 3 plumose setae; ischium 0.08 times basis length, with plumose seta; merus 3.0 times ischium length, with 4 simple and 4 plumose setae; carpus 0.9 times merus length, with 6 simple and 2 plumose setae; propodus 0.8 times carpus length, with 3 simple and 2 plumose setae; dactylus 0.5 times propodus length, with 6 simple setae terminally; exopod 0.9 times basis length, basal article unarmed, flagellum with plumo-annulate setae ( Figure 29B).

Pereopod 2 basis 0.6 times length of all other articles together, unarmed; ischium 0.07 times basis length, unarmed; merus 3.7 times ischium length, with 2 simple and 1 plumose setae; carpus 2.4 times merus length, with 1 simple and 3 plumose setae; propodus 0.3 times carpus length, with simple seta; dactylus 3.1 times propodus length, with 6 simple and 1 plumose setae, 1 simple and 2 microserrate setae terminally; exopod 1.2 times basis length, basal article with 2 simple setae, flagellum with plumo-annulate setae ( Figure 29C).

Pereopod 3 basis 1.8 times length of all other articles together, unarmed; ischium 0.1 times basis length, with 2 simple setae; merus 1.5 times ischium length, with 1 simple seta; carpus 1.7 times merus length, with 7 simple 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 29D).

Pereopod 4 basis 1.2 times length of all other articles together, unarmed; ischium 0.1 times basis length, with 2 simple setae; merus 1.6 times ischium length, unarmed; carpus 1.3 times merus length, with 7 simple and 1 annulate setae; propodus 0.5 times carpus length, with annulate seta; dactylus 0.7 times propodus length, with 2 simple and 1 microserrate setae terminally ( Figure 29E).

Pereopod 5 basis with 2 simple and 4 pedunculate setae; ischium with simple seta; merus 1.5 times ischium length, with 2 simple setae; carpus 1.7 times merus length, with 4 simple and 1 annulate setae; propodus 0.3 times carpus length, with 1 annulate and 1 complex pedunculate setae; dactylus equal to propodus length, with 2 simple and 1 simple with subterminal setule setae terminally ( Figure 29F).

Uropod peduncles 2.4 times pleonite 6 length, with 0–3 simple setae, medial margin slightly serrate. Uropod endopod uniarticulate, 0.4 times peduncle length, with 3 simple with single subterminal setule setae medially, 1 simple seta with single subterminal setule and 1 complex pedunculate seta laterally, terminal seta simple with single subterminal setule. Uropod exopod of 2 articles, equal to length of endopod; article 1 0.3 times article 2 length; article 2 with 3 simple setae and 2 microserrate setae terminally ( Figure 29G).

Etymology. The species is named microsulcata in reference to the distinct sulcus, bounded by carinae, and in reference to Campylaspis macrosulcata n. sp., a similar but larger, more robust species.

Remarks. In Campylaspis macrosulcata there are no transverse carinae connecting the carinae that bound the sulcus, but in C. microsulcata there is a pair of carinae posteriorly that connect the carinae bounding the sulcus. Also, C. macrosulcata is larger and more robust than C. microsulcata .