Siniotrochus myriodontus Gage & Billett 1986

• Main Author: Bohn, Jens Michael
• Format: Text
• Language: unknown
• Published: Zenodo 2006
• Subjects: Biodiversity; Taxonomy; Animalia; Echinodermata; Holothuroidea; Apodida; Myriotrochidae; Siniotrochus; Siniotrochus myriodontus; Pacific; St. Helena; Porcupine Seabight; Pawson; Northeast Atlantic
• Online Access: https://dx.doi.org/10.5281/zenodo.6255872; https://zenodo.org/record/6255872

Siniotrochus myriodontus Gage & Billett, 1986 (Figs 13 A, 14) Siniotrochus myriodontus Gage & Billett, 1986: 266 –272, figs 28 (C–E), 29–31; Bohn, 2005: 232 –234, figs 1 (A–B), 2 Material. M 48 / 1­347: 1 posterior fragment (ZSM 20020016). M 48 / 1­351: 2 posterior fragments (ZSM 20020015). Remarks. Gage and Billett (1986) provide an excellent description of this species, including detailed information on a variety of taxonomically important wheel parameters. Given that the current specimens have already been treated in more detail (Bohn 2005) the species is only shortly outlined: body about cylindrical, up to 31 mm long and 7 mm wide; tentacles 12, with four pairs of lateral digits; calcareous ring with 5 radial and 5 interradial plates; body wall with single layer of wheel deposits of the so­called siniotrochid type (Fig. 13 A); wheel diameter 414 (284–560); hub about half the diameter of the wheel, perforated by several holes; spokes 17 (12–25); inward­pointing teeth 42 (30–67); outward­pointing primary teeth 18 (11–31); outward­pointing secondary teeth 6 (0–29) ( arrowheads in Fig. 13 A); simple rod deposits present in tentacles and around anus. Siniotrochus myriodontus closely resembles the north­western Atlantic Ocean S . phoxus Pawson, 1971 from which it differs by the presence of outward­pointing secondary teeth on the wheels. Distribution. (Fig. 14) North­eastern Atlantic Ocean (Porcupine Seabight) and southeastern Atlantic Ocean, 3490–5389 m (Bohn 2005; Gage & Billett 1986). Species Depth (m) Source Bathycrinus aldrichianus Wyville Thomson, 1876 5415 herein Porphyrocrinus incrassatus (Gislén, 1933) 2400–2780 Gislén 1933 Deima validum validum Théel, 1879 4088–5426 IFREMER BIOCEAN; herein Psychropotes depressa (Théel, 1882) 2270 Hansen 1975 Psychropotes longicauda Théel, 1882 2475–3244 IFREMER BIOCEAN Psychropotes semperiana Théel, 1882 3244–5126 IFREMER BIOCEAN; herein Peniagone diaphana (Théel, 1882) 3034 IFREMER BIOCEAN Peniagone purpurea (Théel, 1882) 4660–5415 1 IFREMER BIOCEAN; herein : Published as part of Bohn, Jens Michael, 2006, Crinoidea and Holothuroidea (Echinodermata) of the abyssal Angola Basin — Results of the DIVA­ 1 expedition of FS " Meteor " (Cruise M 48 / 1), pp. 1-31 in Zootaxa 1276 on pages 22-23, DOI: 10.5281/zenodo.173337 : {"references": ["Gage, J. D. & Billett, D. S. M. (1986) The family Myriotrochidae Theel (Echinodermata: Holothuroidea) in the deep northeast Atlantic Ocean. Zoological Journal of the Linnean society, 88, 229 - 276.", "Bohn, J. M. (2005) On two rare abyssal Myriotrochidae (Echinodermata: Holothuroidea: Apodida) new to the South Atlantic: Siniotrochus myriodontus Gage and Billett, 1986 and Neolepidotrochus parvidiscus angolensis subsp. nov. Organisms, Diversity and Evolution, 5, 231 - 238.", "Thomson, C. W. (1876) Notice of new living crinoids belonging to the Apiocrinidae. Journal of the Linnean Society of London. Zoology, 13, 47 - 55.", "Gislen, T. (1933) Papers from Dr. Th. Mortensen's Pacific Expedition 1914 - 16. LXVII. A small collection of crinoids from St. Helena. Videnskabelige Meddelelser fra Dansk naturhistorisk Forening i Kobenhavn, 93: 475 - 485.", "Theel, H. (1879). Preliminary report on the Holothuridae of the Exploring voyage of H. M. S. \" Challenger \", I. Bihang till Kungliga Svenska Vetenskaps-Akademiens Handlingar, 5, 1 - 20.", "Theel, H. (1882) Report on the Holothurioidea dredged by H. M. S. Challenger during the years 1873 - 76. Part I. Report of the scientific results of the voyage of H. M. S. Challenger during the years 1873 - 76. Zoology, 4, 176 pp.", "Hansen, B. (1975) Systematics and Biology of the Deep-Sea Holothurians. Part 1. Elasipoda. Galathea Report, 13, 262 pp."]}