Aspidosiphon (Paraspidosiphon) cutleri, Silva-Morales & Gómez-Vásquez, 2021
publication ID |
https://doi.org/ 10.5852/ejt.2021.740.1283 |
publication LSID |
lsid:zoobank.org:pub:07F1B593-9F4F-4B32-88D9-ADC5CA0BEB84 |
DOI |
https://doi.org/10.5281/zenodo.4643212 |
persistent identifier |
https://treatment.plazi.org/id/03CA87A4-D366-803A-79E4-4083FE4D6477 |
treatment provided by |
Plazi (2021-03-29 06:54:26, last updated by Guilherme 2024-12-09 17:50:24) |
scientific name |
Aspidosiphon (Paraspidosiphon) cutleri |
status |
sp. nov. |
Aspidosiphon (Paraspidosiphon) cutleri sp. nov.
urn:lsid:zoobank.org:act:48C0AFB4-02DD-4164-9223-BDA2CC1D0A43
Fig. 12 View Fig
Etymology
In memory of Edward Cutler, expert in sipunculans and the principal source of inspiration for this work.
Material examined
Holotype MEXICO • Oaxaca, Camarón Beach ; 15°39′45″ N, 96°31′33″ W; 6 Apr. 2013; in dead coral; RXP and VAR leg.; UMAR-SIPU 082. GoogleMaps
Paratypes MEXICO • 1; same locality as for holotype; 16 Nov. 2016; JGV leg.; depth 2 m, in rocks, UMAR-SIPU 083 GoogleMaps • 1; Oaxaca, San Agustin Bay ; 15°41′21.1″ N, 96°14′11.1″ W; 18 Mar. 2018; depth 2 m, in rocks; UMAR-SIPU 107 GoogleMaps .
Description
Trunk 30 mm in length, white ( Fig. 12A View Fig ). Anal and caudal shield brown. Sixteen longitudinal grooves in anal shield. Caudal shield also with grooves ( Fig. 12C–D View Fig ). Units of anal region distributed in longitudinal lines ( Fig. 12E View Fig ). More than 100 rings of unidentate proximal hooks, smaller than distal hooks ( Fig. 12F View Fig ) followed by scattered pyramidal hooks. Longitudinal muscles of body wall gathered into anastomosing bands. A pair of retractor muscles, fused for most of their length. Nephridia unilobed, occupying 50% of the trunk. Spindle muscle bifurcated near its anterior end ( Fig. 12B View Fig ).
Remarks
The species that are most similar to Aspidosiphon (Paraspidosiphon) cutleri sp. nov. are A. (P.) coyi de Quatrefages, 1865 , described from the Indian Ocean, and A. (P.) laevis de Quatrefages, 1865 . The type material of these two species was described by Saiz-Salinas (1983). The main differences between these species are the following: Aspidosiphon (P.) coyi has bidentate hooks and disperse units in the anterior region of the trunk; Aspidosiphon laevis lacks bidentate hooks and the units on the anterior region of the trunk are dispersed; nephridiopores are at the same level as the anus in both these species; on the other hand, A. (P.) cutleri sp. nov. only has unidentate hooks and the units are distributed in lines on the anterior region of the trunk; the nephridiopores are posterior to the anus. It is likely that the record of A. (P.) laevis from Costa Rica ( Dean et al. 2010) corresponds to this new species; however, it is necessary to review the specimens.
Habitat
Subtidal (2 m); in dead coral.
Distribution
Oaxaca, Mexico.
Dean H. K., Sibaja - Cordero J. A., Cortes J., Vargas R. & Kawauchi G. Y. 2010. Sipunculans and echiurans of Isla del Coco (Cocos Island), Costa Rica. Zootaxa 2557 (1): 60 - 68. https: // doi. org / 10.11646 / zootaxa. 2557.1.6
Quatrefages M. A. de. 1865. Annelides et gephyriens. In: Histoire naturelle des Anneles marins et d'Eau douce. Libraire Encyclopedique de Roret, Paris. Available from https: // www. biodiversitylibrary. org / page / 52110858 [accessed 4 Mar. 2021].
Saiz-Salinas J. I. 1983. Redescripcion de los antiguos Tipos de Sipunculidos (Sipuncula) descritos por el Prof. Jean-Louis-Armand de Quatrefages de Breau en 1865 y encontrados en las Colecciones de Laboratorio de los Gusanos del Museo Nacional de Historia Natural de Paris. Dissertation. Universidad del Pais Vaco, Bilbao, Spain.
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