Cyclaspis zealandiaensis, Gerken, Sarah, 2013

Gerken, Sarah, 2013, New Zealand Bodotriidae (Crustacea: Cumacea), Zootaxa 3630 (1), pp. 1-38 : 30-37

Cyclaspis zealandiaensis n. sp.

Figures 15–18

Type material. Holotype ovigerous female, NIWA 80731; Paratype ovigerous female, dissected, NIWA 80732; Paratype adult male, dissected, NIWA 80733; Paratype ovigerous female, adult male, NIWA 80734; 43.9790°S, 179.6298°E – 43.9850°S, 179.6218°E, 529–530 m, 9 April 2007.

Other material examined. 1 preparatory, 1 subadult females, NIWA 84473, 43.7967°S, 175.3158°E – 43.8045°S, 175.3148°E, 418–422 m, 27 April 2007. 4 ovigerous females, 2 subadult males, 7 mancae, NIWA 84485, 42.6213°S, 175.9225°E – 42.6203°S, 175.9335°E, 1194–1199 m, 26 April 2007. 1 ovigerous female, NIWA 84486, 44.4862°S, 177.1413°E – 44.4841°S, 177.1416°E, 1235–1239 m, 6 April 2007. 6 adult males, 1 ovigerous female, 38 juveniles, NIWA 84484, 43.9790°S, 179.6298°E – 43.9850°S, 179.6218°E, 529–530 m, 9 April 2007. 1 ovigerous female, 3 juveniles, NIWA 84478, 40.1277°S, 170.2140°E – 40.1352°S, 170.2090°E, 803–805 m, 5 June 2007. 4 ovigerous females, 13 juveniles, 7 mancae, NIWA 84490, 43.8363°S, 176.7092°E – 43.8330°S, 176.7127°E, 478–479 m, 5 April 2007. 1 ovigerous female, 2 juveniles, NIWA 84489, 43.0650°S, 174.9325°W – 43.0732°S, 174.9348°W, 933–940 m, 13 April 2007. 3 adult males, 23 juveniles, 13 mancae, NIWA 45834, 43.5300°S, 178.5048°E – 43.5363°S, 178.5118°E, 346 m, 24 April 2007. 4 juveniles, NIWA 45836, 38.3720°S, 168.5670°E – 38.3720°S, 168.5670°E, 482 m, 28 May 2007. 1 juvenile, NIWA 84468, 44.0750°S, 174.5069°E – 44.0750°S, 174.5074°E, 520 m, 3 April 2007. 4 ovigerous females, 30 juveniles, 6 mancae, NIWA 45831, 40.8800°S, 170.8555°E – 40.8883°S, 170.8565°E, 529–534 m, 6 June 2007. 1 juvenile, NIWA 84488, 42.9958°S, 178.9957°E – 42.9910°S, 179.0052°E, 520–530 m, 24 April 2007. 6 ovigerous females, 23 adult males, 28 juveniles, 13 mancae, NIWA 45832, 42.9958°S, 178.9957°E – 42.9910°S, 179.0052°E, 520–530 m, 24 April 2007. 1 adult male, 2 juveniles, 3 mancae, NIWA 45833, 43.2903°S, 175.5522°W – 43.2933°S, 175.5630°W, 638–644, 15 April 2007. 1 manca, NIWA 84483, 0705/346. 1 ovigerous female, 1 juvenile, 2 mancae, NIWA 84482, 44.0162°S, 178.5210°E – 44.0143°S, 178.5175°E, 769–771 m, 7 April 2007. 1 preparatory female, 1 adult male, 1 subadult male, 13 juveniles, 3 mancae, NIWA 84480, 43.5212°S, 178.6203°W – 43.5228°S, 178.6315°W, 424–425 m, 18 April 2007. 1 manca, NIWA 84476, 42.5037°S, 176.5766°W – 42.5058°S, 176.5705°W, 853 m, 17 April 2007. 1 juvenile, NIWA 84487, 43.0650°S, 174.9325°W – 43.0732°S, 174.9348°W, 933–940 m, 13 April 2007. 2 juveniles, NIWA 84475, 43.5212°S, 178.6203°W – 43.5228°S, 178.6315°W, 424–425 m, 18 April 2007. 3 ovigerous females, 3 adult males, 1 manca, NIWA 84471, 42.9958°S, 178.9957°E – 42.9910°S, 179.0052°E, 520–530 m, 24 April 2007. 6 adult males, 6 juveniles, 3 mancae, NIWA 84479, 44.1208°S, 174.8432°E – 44.1242°S, 174.8448°E, 512–513 m, 4 April 2007. 1 juvenile, NIWA 84470, 43.9790°S, 179.6298°E – 43.9850°S, 179.6218°E, 529–530 m, 9 April 2007. 1 juvenile, NIWA 84474, 44.4862°S, 177.1413°E – 44.4841°S, 177.1416°E, 1235–1239 m, 6 April 2007. 2 ovigerous females, NIWA 84477, 44.1208°S, 174.8432°E – 44.1242°S, 174.8448°E, 512–513 m, 4 April 2007. 1 juvenile, NIWA 84481, 40.8800°S, 170.8555°E – 40.8883°S, 170.8565°E, 529–534 m, 6 June 2007. 1 ovigerous female, NIWA 84469, 39.6373°S, 172.1532°E – 39.6457°S, 172.1522°E, 264–266 m, 7 June 2007.

Diagnosis. Female. Carapace smooth, unornamented; 0.5 times as high as long; eyelobe without lenses, extending past anterior margin of pseudorostral lobes; antennal notch present; anteroventral corner serrated. Pereonite 1 visible laterally. Pereonite 2 not produced dorsally. Pleon without articular pegs. Uropod peduncles much shorter than pleonite 6; endopod subequal to exopod; endopod with short stout seta medially; exopod with 3 microserrate setae medially. Male. Carapace smooth, less arched than in female; antennal notch weak; anteroventral corner smooth. Pereonite 1 not visible. Uropod endopod with short plumose setae proximally, stout microserrate setae with single subterminal setule distally; exopod without terminal seta.

Description of the ovigerous female. Holotype ovigerous female, 6.3 mm, NIWA 80731. Paratype ovigerous female, 7.2 mm, NIWA 80732. Carapace smooth; pseudorostral lobes 0.4 times carapace length; eye lobe 0.1 times carapace length, extending past anterior margin of pseudorostral lobes, without lenses; carapace 1.7–2.2 times length of pereonites together. Pleonite 6 with dorsal keel distally ( Figure 15 A–B).

Antennule peduncle article 1 longest, with 4 complex pedunculate setae; article 2 0.5 times article 1 length, with 4 complex pedunculate setae; article 3 equal to article 2 length, unarmed; main flagellum of 3 articles, with 2 aesthetascs and simple seta; accessory flagellum of 2 articles, with 3 simple setae ( Figure 15 C).

Mandible navicular ( Figure 15 D).

Maxillule with 2 endites; outer endite broad, with 7 microserrate setae terminally, margin with fine hairlike setae and simple seta; inner endite with 2 simple, 1 tricuspid and 1 pappose setae; palp with 2 microserrate setae ( Figure 15 E).

Maxilla with 3 endites; broad endite with simple setae distally, microserrate, bicuspid, and pappose setae at medial lateral corner, medial margin with row of setae; medial narrow endite with 4 simple setae terminally; distal narrow endite with 4 simple setae terminally; both narrow endites extending past margin of broad endite ( Figure 15 F).

Maxilliped 1 basis 0.9 times length of all other articles together, produced as lobe medially, medial margin with pappose and plumose setae, distal margin with 2 hook, 3 simple and 1 broad microserrate setae; ischium absent; merus 0.3 times basis length, unarmed; carpus 1.6 times merus length, with 7 simple and 3 beak setae medially, plumose seta distally; propodus 0.4 times carpus length, with 4 plumose setae; dactylus 0.6 times propodus length, with 3 simple setae terminally ( Figure 15 G).

Maxilliped 2 basis 1.8 times length of all other articles together, with thickly plumose seta medially, lateral margin produced as strong serrations distally, with 1 simple and 1 microserrate setae; ischium 0.02 times basis length, only partially visible; merus 0.1 times basis length, with thickly plumose seta; carpus 1.7 times merus length, with 5 plumose setae medially, 2 plumose setae distally; propodus 0.7 times carpus length, with 4 plumose setae; dactylus 0.7 times propodus length, with 5 simple setae ( Figure 15 H).

Maxilliped 3 basis 2.6 times length of all other articles together, lateral margin produced distally to midpoint of merus, with 5 pappose setae; ischium 0.08 times basis length, unarmed; merus 1.1 times ischium length, with simple seta laterally; carpus 1.1 times merus length, with simple seta laterally; propodus 0.4 times carpus length, with several simple setae; dactylus 1.8 times propodus length; exopod shorter than basis, flagellum with plumo–annulate setae ( Figure 15 I).

Pereopod 1 basis 1.2 times length of all other articles together, medial margin lined with fine hairlike setae; ischium 0.08 times basis length, unarmed; merus 1.1 times ischium length, unarmed; carpus 2.9 times merus length, unarmed; propodus 1.1 times carpus length, unarmed; dactylus 0.6 times propodus length, with 6 simple setae terminally; exopod shorter than basis, flagellum with plumo–annulate setae ( Figure 16 A).

Pereopod 2 basis equal to length of all other articles together, margins with simple setae, plumose seta distally; ischium 0.1 times basis length, with plumose seta; merus 2.4 times ischium length, with plumose seta; carpus 0.8 times merus length, with 2 microserrate setae with single subterminal setule; propodus 0.6 times carpus length, unarmed; dactylus 1.8 times propodus length, with simple seta, margin strongly serrate, 5 microserrate setae terminally ( Figure 16 B).

Pereopod 3 basis 1.5 times length of all other articles together, with plumose seta; ischium 0.1 times basis length, with 1 simple and 1 annulate setae; merus 1.4 times ischium length, with annulate seta; carpus 1.4 times merus length, with 1 simple and 4 annulate setae; propodus 0.5 times carpus length, with annulate seta; dactylus 0.8 times propodus length, with 3 simple setae terminally ( Figure 16 C).

Pereopod 4 basis 0.8 times length of all other articles together, with plumose seta; ischium 0.1 times basis length, with annulate seta; merus 2.2 times ischium length, with annulate seta; carpus 1.3 times merus length, with 1 simple and 4 annulate setae; propodus 0.5 times carpus length, with annulate seta; dactylus 0.8 times propodus length, with 3 simple setae terminally ( Figure 16 D).

Pereopod 5 basis 0.7 times length of all other articles together, with 2 simple and 1 plumose setae; ischium 0.2 times basis length, with annulate seta; merus 1.7 times ischium length, with annulate seta; carpus 1.3 times merus length, with 5 annulate setae; propodus 0.4 times carpus length, with 1 simple and 1 annulate setae; dactylus 0.8 times propodus length, with 3 simple setae terminally ( Figure 16 E).

Uropod peduncles 0.6 times pleonite 6 length, unarmed. Uropod endopod uniarticulate, 2.3 times peduncle length, medial margin serrate, with short stout seta. Uropod exopod of 2 articles, subequal to length of endopod; article 1 0.2 times article 2 length; article 2 with 3 microserrate setae medially, terminal seta short and simple ( Figure 16 F).

Description of adult male. Paratype adult male, 5.3 mm, NIWA 80734.. Carapace smooth; pseudorostral lobes 0.4 times carapace length; eye lobe 0.1 times carapace length, extending past anterior margin of pseudorostral lobes, without lenses; carapace 2 times length of pereonites together ( Figures 17 A–B).

Antennule peduncle article 1 longest, margins lined with fine hairlike setae, with 2 complex pedunculate setae; article 2 0.5 times length of article 1, with 2 complex pedunculate setae; article 3 0.9 times length of article 2, with complex pedunculate seta; main flagellum of 2 articles, first article slightly broadened with 3 aesthetascs, second article with 3 aesthetascs; accessory flagellum of 1 article, with 3 simple setae ( Figure 17 C).

Antenna peduncle articles 2–3 unarmed, article 4 with ranks of setae, article 5 longest, with ranks of setae; flagellum of short articles, extending to pleonite 5 ( Figure 17 B, D).

Mandible navicular, lacinia mobilis with 3 cusps ( Figure 17 E)

Maxilliped 3 basis 2.4 times length of all other articles together, produced as lobe distally, lateral lobe margin lined with fine hairlike setae, with 5 pappose setae distally and medially, lobe extending to merus–carpus border; ischium 0.07 times basis length, with simple seta; merus 1.2 times ischium length, with plumose seta distally; carpus 1.2 times merus length, with 3 simple setae; propodus 0.9 times carpus length, with 2 plumose setae medially; dactylus 0.9 times propodus length, with 4 simple setae and 4 simple setae terminally; exopod shorter than basis, flagellum with plumo–annulate setae ( Figure 17 F).

Pereopod 1 basis 2.1 times length of all other articles together, with 2 pappose setae distally; ischium 0.03 times basis length, unarmed; merus 3.3 times ischium length, with simple seta; carpus 1.5 times merus length, with 2 simple setae; propodus 1.1 times carpus length, with simple seta; dactylus 0.8 times propodus length, with 5 simple setae terminally; exopod shorter than basis, flagellum with plumo–annulate setae ( Figure 17 G).

Pereopod 2 basis 1.1 times length of all other articles together, unarmed; ischium 0.1 times basis length, with plumose seta; merus 2.8 times ischium length, with plumose seta; carpus 0.8 times merus length, with 3 microserrate setae with single subterminal setule; propodus 0.3 times carpus length, unarmed; dactylus 2.7 times propodus length, with 3 simple and 3 microserrate setae with single subterminal setule terminally ( Figure 18 A).

Pereopod 3 basis 1.4 times length of all other articles together, with 8 simple setae; ischium 0.1 times basis length, unarmed; merus 1.6 times ischium length, unarmed; carpus 1.4 times merus length, with 3 simple and 2 annulate setae; propodus 0.7 times carpus length, with 1 simple and 1 annulate setae; dactylus 0.5 times propodus length, with 2 simple setae terminally ( Figure 18 B).

Pereopod 4 basis with plumose seta; ischium with annulate seta; merus 1.8 times ischium length, with annulate seta; carpus 1.5 times merus length, with 3 annulate setae; propodus 0.4 times carpus length, with annulate seta; dactylus 0.7 times propodus length, with 3 simple setae terminally ( Figure 18 C).

Pereopod 5 basis 0.8 times length of all other articles together, with 3 simple and 1 plumose setae; ischium 0.2 times basis length, with annulate seta; merus 1.4 times ischium length, with 1 simple and 1 annulate setae; carpus 1.4 times merus length, with 1 simple and 3 annulate setae; propodus 0.6 times carpus length, with annulate seta; dactylus 0.8 times propodus length, with 3 simple setae terminally ( Figure 18 D).

Pleopod 1 longest; peduncle with plumose setae medially; endopod with weak process, exopod biarticulate, both lined with long plumose setae ( Figure 18 E).

Pleopod 5 shortest; peduncle with plumose setae medially; endopod with weak process, exopod biarticulate, both lined with plumose setae ( Figure 18 F).

Uropod peduncles 0.7 times pleonite 6 length, with plumose setae medially. Uropod endopod uniarticulate, 2 times peduncle length, with short plumose setae proximally and short, stout microserrate setae with single subterminal setule distally. Uropod exopod 0.9 times length of endopod; article 1 0.2 times length of article 2, unarmed; article 2 unarmed, without terminal seta ( Figure 18 G).

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.This species was the most commonly encountered, found at 18 of the 38 stations analyzed. Stations included both the Chatham Rise and the Challenger Plateau.

This species is most similar to the other New Zealand species that have no lateral ridges on the carapace, C. levis , C. hayeae and C. petrescui . Both C. levis and C. petrescui have distinct lenses in the eyelobe, unlike C. zealandiensis . Cyclaspis zealandiaensis can be differentiated from C. hayeae by the carapace being about 0.5 as high as long, and the female uropod exopod bearing 3 long microserrate setae medially. In comparison, C. hayeae has the carapace about 0.7 as high as long, and the female uropod exopod has no setae medially. In general, the carapace of C. hayeae is more rounded and globular than the carapace of C. zealandiensis .

Figures

FIGURE 15. Cyclaspis zealandiaensis n. sp. Holotype ovigerous female, NIWA 80731. A, dorsal view. Paratype ovigerous female, NIWA 80732. B, side view; C, antennule; D, mandibles; E, maxillule; F, maxilla; G, maxilliped 1; H, maxilliped 2; I, maxilliped 3.

FIGURE 16. Cyclaspis zealandiaensis n. sp. Paratype ovigerous female, NIWA 80732. A, pereopod 1; B, pereopod 2; C, pereopod 3; D, pereopod 4; E, pereopod 5; F, pleonite 6 and uropods.

FIGURE 17. Cyclaspis zealandiaensis n. sp. Paratype adult male, NIWA 80734. A, dorsal view; B, side view; C, antennule; D, antenna; E, mandible; F, maxilliped 3; G, pereopod 1.

FIGURE 18. Cyclaspis zealandiaensis n. sp. Paratype adult male, NIWA 80734. A, pereopod 2; B, pereopod 3; C, pereopod 4; D, pereopod 5; E, pleopod 1; F, pleopod 5; G, pleonite 6 and uropods.