Araeosoma alternatum Mortensen 1934

• Main Author: Anderson, Owen F.
• Format: Other/Unknown Material
• Language: unknown
• Published: 2013
• Subjects: Biodiversity; Taxonomy; Animalia; Echinodermata; Echinoidea; Echinothurioida; Echinothuriidae; Araeosoma; Bay of Plenty; Puysegur Bank; Auckland Islands
• Online Access: https://zenodo.org/record/5622890; https://doi.org/10.5281/zenodo.5622890

Araeosoma alternatum Mortensen, 1934 Figures 3 E, 4 C, 29–31 A. coriaceum Döderlein 1906 Material examined —West Norfolk Ridge (Hiroshima seamount): 4 specimens (175, 112, 192 mm TD), 34 ° 22.6´S, 168 ° 25.1´E, 376–380 m, MV F 168905. East coast Northland: 2 specimens (150, 124, mm TD), 34 ° 57.6´S, 175 ° 10.8´E, 581 – 553 m, NIWA 3519. Bay of Plenty: Tumokemoke seamount, 1 specimen (170 mm TD), 37 ° 28.1´S, 177 ° 7.0´E, 230–322 m, NIWA 46084 (dry); 1 specimen, 37 ° 42.0´S, 176 ° 45.0´E, Te Papa EC 763. East Chatham Rise: Diamond Head C, 3 specimens (172, 139, 130 mm TD), 44 ° 8.8´S, 174 ° 41.4´W, 440–600 m, NIWA 53579; Diamond Head B, 2 specimens (155, 144 mm TD), 44 ° 9.0´S, 174 ° 45.4´W, 519–609 m, NIWA 54042. Puysegur Bank: 1 specimen, 46 ° 40.0´S, 165 ° 42.0´E, Te Papa EC 6607 (dry). Auckland Islands: 1 specimen (194 mm TD), 49 ° 1.0´S, 166 ° 32.9´E, 620–627 m, NIWA 62822 (dry); 1 specimen (180 mm TD), 49 ° 7.3´S, 166 ° 41.8´E, 571–593 m, NIWA 46089; 2 specimens (208, 208 mm TD), 49 ° 17.1´S, 166 ° 45.7´E, 618–622 m, NIWA 65167; 2 specimens (230, 182 mm TD), 49 ° 28.2´S, 166 ° 37.2´E, 537 – 531 m, NIWA 61623 & NIWA 66710; 4 specimens (215, 226, 181, 215 mm TD), 50 ° 58.0´S, 165 ° 45.0´E, 549 m, NIWA 23728, NIWA 29429, & NIWA 29436; 1 specimen, 49 ° 55.3´S, 165 ° 59.7´E, Te Papa EC 3983 (dry). Macquarie Ridge (Seamount 5): 1 specimen (159 mm TD), 51 ° 3.7´S, 161 ° 58.7´E, 385–498 m, NIWA 39933. Tasmania: 1 specimen (205 mm TD), 44 ° 4.0´S, 146 ° 24.1´E, 470–524 m, MV F 168937; 28 specimens, 44 ° 9.1´S, 147 ° 7.7´E, 800–950 m, AM J 24562; 2 specimens, 44 ° 12.6´S, 147 ° 2.6´E, 1078 – 593 m, AM J 24542. Madagascar: 3 specimens (118, 120, 130 mm TD), 12 ° 51.0´S, 48 ° 8.0´E, 558 m, MNHN IE- 2007 - 228. Unless stated, stored in 80 % ethanol. Size range —The median test diameter of the 27 specimens measured was 173 mm, and the largest specimen was 230 mm TD. Remarks —Before this review, the only previously recorded specimen of A. alternatum was one collected by the German Deepsea Expedition of 1898 – 99 ...