Campylaspis zealandiaensis, Gerken, 2012

Gerken, Sarah, 2012, 3524, Zootaxa 3524, pp. 1-124 : 82-89

Campylaspis zealandiaensis n. sp.

Figures 47–50

Type material. Holotype subadult female, NIWA 80648 , paratype ovigerous female, dissected, NIWA 80649 , paratype adult male, dissected, NIWA 80650 , 40.1277°S, 170.2140°E – 40.1352°S, 170.2090°E, 803–805 m, 5 June 2007.

Other material examined. 1 ovigerous female, NIWA 79304, 44.5607°S, 178.4762°W – 44.5592°S, 178.4830°W, 1076–1103 m, 10 April 2007. 2 subadult females, 2 subadult males, 1 manca, NIWA 46208 , 43.2903°S, 175.5522°W – 43.2933°S, 175.5630°W, 638–644, 15 April 2007 . 3 subadult females, 1 adult male, 1 subadult male, 6 juveniles, NIWA 46211 , 0705 /160 . 2 subadult females, 1 adult male, NIWA 79305 , 40.1277°S, 170.2140°E – 40.1352°S, 170.2090°E, 803–805 m, 5 June 2007 .

Diagnosis. Females and subadult males. Carapace with deep sulcus, distinct ridge posteriorly bounding branchial region, with 1 pair of large tubercles posterior and lateral of corners of frontal lobe, with transparent areas posterior of tubercles, with pseudorostral lobes raised dorsally relative to carapace in side view; pseudorostrum weakly dorsally directed. Carapace, pereonites and pleonites with sparsely scattered red chromatophores. Pereonites 1–5 free, pereonite 1 with dorsally directed, bifurcated lappet. Pereopod 2 dactylus normal, terminal seta long. Uropod peduncles 3.2 times length of pleonite 6. Male. Carapace much less vaulted, sulcus extending farther posterior than in female, without setae. Pereonites 1–2 with anteriorly directed dorsal lappets. Uropod peduncles 3.8 times length of pleonite 6, more setose than in female.

Description of female.

Holotype subadult female, 4.3 mm, NIWA 80648 . Paratype ovigerous female, 3.1 mm, NIWA 80649 . Carapace with deep sulcus, distinct ridge posteriorly bounding branchial region, with 1 pair of large tubercles posterior and lateral of corners of frontal lobe, with transparent areas posterior of tubercles, with pseudorostral lobes raised dorsally relative to carapace in side view; pseudorostral lobes weakly dorsally directed, 0.2 times carapace length; eyelobe 0.05 times carapace length, without lenses. Pereonites 1–5 free, pereonite 1 with dorsally directed, bifurcated lappet. Carapace, pereonites and pleonites with sparsely scattered red chromatophores ( Figures 47A–B) .

Antennule peduncle article 1 longest, with 3 simple setae; article 2 0.8 times article 1 length, with 2 simple setae; article 3 0.8 times article 2 length, unarmed; main flagellum of 3 articles, 1.2 times article 1 length, with 2 aesthetascs and simple seta; accessory flagellum of 1 article, with 4 pedunculate setae ( Figure 47C).

Other antennule peduncle article 1 longest, unarmed; article 2 0.7 times article 1 length, with 3 simple and 1 complex pedunculate setae; article 3 0.6 times article 2 length, unarmed; main flagellum of 3 articles, 0.7 times article 1 length, with 1 aesthetasc and 5 simple setae; accessory flagellum of 1 article, with 2 complex pedunculate setae ( Figure 47D).

Mandible truncate, with 3–4 microserrate setae medially, lacinia mobilis with 3 cusps ( Figure 47E).

Maxillule with 2 endites; outer endite broad, with 4 stout simple and 5 dentate setae; inner endite with 2 simple, 2 microserrate and 1 bicuspid setae; palp with 1 simple and 1 microserrate setae ( Figure 47F).

Maxilliped 1 basis with 3 plumose and 2 hook setae; merocarpus 1.3 times basis length, with 4 simple and 1 plumose setae, margins lined with fine hair-like setae; dactylus with 2 simple setae ( Figure 47G).

Maxilliped 2 basis 0.7 times all other articles together, with plumose seta; ischium absent; merus 0.4 times basis length, unarmed; carpus 0.7 times merus length, with plumose seta medially, plumose seta laterally, medial margin produced as large tooth, lateral margin lined with fine hair-like setae; propodus equal to carpus length, with simple seta, distal margin produced as long process; dactylus 1.5 times propodus length, terminal margin produced as teeth, central tooth short, outer pair equal ( Figure 47H).

Maxilliped 3 basis 0.7 times length of all other articles together, with 1 simple, 1 plumose and 1 pappose setae medially, plumose seta at distal corner; ischium 0.4 times basis length, with 5 simple setae; merus 0.9 times ischium length, with 2 simple setae medially, plumose seta laterally; carpus equal to merus length, with 3 simple and 2 plumose setae medially, plumose seta laterally; propodus 1.2 times carpus length, with 3 plumose setae; dactylus 0.7 times propodus length, with 3 simple setae terminally; exopod equal to basis length, basal article unarmed, flagellum with plumo-annulate setae ( Figure 48A).

Pereopod 1 basis 0.8 times length of all other articles together, with 3 simple and 3 plumose setae; ischium 0.1 times basis length, with plumose seta merus 3.5 times ischium length, with 9 simple and 4 plumose setae; carpus 0.8 times merus length, with 12 simple and 4 plumose setae; propodus 0.9 times carpus length, with 7 simple and 2 plumose setae; dactylus 0.6 times propodus length, with 5 simple setae terminally, margins lined with fine hair-like setae; exopod 0.9 times basis length, basal article with 2 simple setae, flagellum with plumo-annulate setae ( Figure 48B).

Pereopod 2 basis 0.4 times length of all other articles together, with 2 simple and 1 plumose setae; ischium 0.06 times basis length, unarmed; merus 5.5 times ischium length, with 2 simple and 2 plumose setae; carpus 2.2 times merus length, with 5 simple and 2 plumose setae; propodus 0.3 times carpus length, with simple seta; dactylus 4.0 times propodus length, with 5 simple and 5 plumose setae, terminal seta plumose; exopod 1.5 times basis length, basal article with simple seta, flagellum with plumo-annulate setae ( Figure 48C).

Pereopod 3 basis 1/6 times length of all other articles together, with 3 simple and 3 complex pedunculate setae; ischium 0.08 times basis length, with plumo-annulate seta; merus 1.8 times ischium length, with 1 simple and 1 plumo-annulate setae; carpus 2.1 times merus length, with 1 simple, 1 plumose and 1 annulate setae; propodus 0.3 times carpus length, with 1 annulate and 1 complex pedunculate setae; dactylus 0.8 times propodus length, with 3 simple setae terminally ( Figure 48D).

Pereopod 4 basis with 7 simple and 2 complex pedunculate setae; ischium with simple seta; merus 1.8 times ischium length, with plumo-annulate seta; carpus 2.4 times merus length, with 1 simple, 1 plumo-annulate and 1 annulate setae; propodus 0.3 times carpus length, with annulate seta; dactylus 0.6 times propodus length, with 2 simple setae, terminal seta microserrate ( Figure 48E).

Pereopod 5 basis 0.7 times length of all other articles together, with 3 simple and 2 complex pedunculate setae; ischium 0.1 times basis length, with simple seta; merus 2.0 times ischium length, with plumose seta; carpus 2.5 times merus length, with 1 simple, 1 plumose and 1 annulate setae; propodus 0.3 times carpus length, with annulate seta; dactylus 0.8 times propodus length, with 2 simple setae, terminal seta microserrate ( Figure 48F).

Uropod peduncles 3.2 times pleonite 6 length, with 10–11 simple setae. Uropod endopod uniarticulate, 0.4 times peduncle length, with 3 microserrate with single subterminal setule setae medially, microserrate with single subterminal setule seta laterally, 5 pedunculate setae, terminal seta microserrate with single subterminal setule. Uropod exopod of 2 articles, equal to length of endopod; article 1 0.3 times article 2 length, unarmed; article 2 with 3–4 simple and 1 microserrate setae, terminal seta microserrate with single subterminal setule ( Figure 48G).

Description of male.

Paratype adult male, 4.4 mm, NIWA 80650. Carapace with deep sulcus, with pair of large tubercles posterior of corners of frontal lobe, few teeth on pseudorostral lobes, pseudorostral lobes raised dorsally of carapace in side view, frontal lobe broader than in female; pseudorostral lobes not dorsally directed, 0.2 times carapace length; eyelobe 0.04 times carapace length, without lenses. Pereonites 1–5 free, pereonites 1–2 with strong dorsally directed lappets, pereonites 4–5 with dorsal spines. Pleonites 1–2 with dorsal spines ( Figures 49A–B).

Antennule peduncle article 1 longest, with 3 simple and 1 complex pedunculate setae; article 2 0.8 times article 1 length, with 4 simple and 1 complex pedunculate setae; article 3 0.8 times article 2 length, unarmed; main flagellum of 3 articles, with 2 aesthetascs, 1 simple and 1 pedunculate setae; accessory flagellum of 1 article, with 4 complex pedunculate setae ( Figure 49C).

Antenna extending past posterior border of uropod peduncles; peduncle of 5 articles; article 2 with pappose seta; articles 4–5 with ranks of setae, incompletely circling articles; flagellum with 18 articles ( Figures 49D–E).

Maxilliped 3 basis 0.9 times length of all other articles together, with pappose seta medially, 2 plumose setae at distal corner, medial margin lined with fine hair-like setae; ischium 0.08 times basis length, with simple seta; merus 5.5 times ischium length, with 6 simple setae medially, plumose seta laterally, medial margin lined with fine hairlike setae, lateral margin produced as large tooth; carpus 0.4 times merus length, with 3 simple, 1 plumose and 2 pappose setae medially, plumose seta laterally; propodus 1.6 times carpus length, with 3 plumose setae medially; dactylus 0.6 times propodus length, with 4 simple setae terminally; exopod 1.1 times basis length, basal article with simple seta, flagellum with plumo-annulate setae ( Figure 50A).

Pereopod 1 basis equal to all other articles together, with 3 plumose setae, medial margin lined with fine hairlike setae distally; ischium 0.1 times basis length, with plumose seta, medial margin lined with fine hair-like setae; merus 3.4 times ischium length, with 10 simple and 4 plumose setae, margins lined with fine hair-like setae; carpus 0.8 times merus length, with 6 simple and 2 plumose setae; propodus equal to carpus length, with 4 simple and 1 plumose setae; dactylus 0.6 times propodus length, with 7 simple setae terminally; exopod equal to basis length, basal article with 2 simple setae, serrate proximally, flagellum with plumo-annulate setae ( Figure 50B).

Pereopod 2 basis 0.7 times length of all other articles together, with 3 simple and 1 pappose setae, margin lined with fine hair-like setae proximally; ischium 0.04 times basis length, unarmed; merus 4.0 times ischium length, with 1 simple and 2 pappose setae, medial margin produced as strong tooth; carpus 2.6 times merus length, with 5 simple and 1 plumose setae; propodus 0.3 times carpus length, with complex pedunculate seta; dactylus 3.6 times propodus length, with 7 simple and 5 plumose setae, terminal seta plumose; exopod 1.2 times basis length, basal article with plumose seta, serrate proximally, margin lined with fine hair-like setae distally, flagellum with plumoannulate setae ( Figure 50C).

Pereopod 3 basis 1.9 times length of all other articles together, with 7 simple, 3 pappose and 2 complex pedunculate setae, medial margin lined with fine hair-like setae; ischium 0.1 times basis length, with plumose seta; merus equal to ischium length, with plumose seta; carpus 2.5 times merus length, with 2 simple and 1 annulate setae, medial margin lined with fine hair-like setae; propodus 0.3 times carpus length, with annulate seta; dactylus 0.8 times propodus length, with 2 simple setae, terminal seta microserrate; exopod 0.8 times basis length, basal article with 1 simple and 1 plumose setae, flagellum with plumo-annulate setae ( Figure 50D).

Pereopod 4 basis 0.8 times length of all other articles together, with 4 simple and 2 complex pedunculate setae, medial margin lined with fine hair-like setae; ischium 0.07 times basis length, with plumo-annulate seta; merus 1.3 times ischium length, with 1 simple and 1 plumo-annulate setae; carpus 4.3 times merus length, with 2 simple and 1 annulate setae, medial margin lined with fine hair-like setae; propodus 0.2 times carpus length, with annulate seta; dactylus 0.8 times propodus length, with 2 simple setae, terminal seta microserrate; exopod 0.9 times basis length, basal article with 1 simple and 1 plumose setae, flagellum with plumo-annulate setae ( Figure 50E).

Pereopod 5 basis equal to all other articles together, with 3 simple, 1 plumose and 2 complex pedunculate setae; ischium 0.1 times basis length, with plumo-annulate seta; merus 1.2 times ischium length, unarmed; carpus 2.4 times merus length, with 3 simple and 1 annulate setae; propodus 0.4 times carpus length, with 1 annulate and 1 complex pedunculate setae; dactylus 0.6 times propodus length, with 2 simple setae, terminal seta microserrate ( Figure 50F).

Uropod peduncles 3.8 times pleonite 6 length, with 9 simple, 6–8 pappose and 6 microserrate setae. Uropod endopod uniarticulate, 0.4 times peduncle length, with 8 microserrate with single subterminal setule setae medially, 1 microserrate with single subterminal setule and 8 pedunculate setae laterally, terminal seta microserrate with single subterminal setule. Uropod exopod 0.9 times length of endopod; article 1 0.3 times article 2 length; article 2 with 2–3 simple and 2 plumose setae, terminal seta plumose ( Figure 50G).

Etymology. The species is named for Zealandia, the ancient continent that makes up the current islands of New Zealand as well as the Chatham Rise, Challenger Plateau, Campbell Plateau, Lord Howe Rise and Norfolk Ridge.

Remarks. The most similar species is Campylaspis bituberculata , which also has a pair of large tubercles dorsally on the carapace. In C. bituberculata the pair of tubercles are at the corners where the frontal lobe and pseudorostral lobes meet, and the uropods are much shorter, with the peduncles less than twice as long as pleonite 6. In comparison, in C. zealandiaensis , the pair of tubercles on the carapace are lateral to the corners where the frontal lobe and pseudorostral lobes meet, and the uropod peduncles are at least three times the length of pleonite 6.

The paratype female had antennules that were not equal. The antennule in Figure 47C is more similar to the proportions of the male antennule and has the more typical two aesthetascs, and is therefore more likely to be the normal antennule, while the antennule in Figure 47D is aberrant, with the distal articles of the peduncle and the main flagellum shortened and with only one aesthetasc.