Ophiacantha costata Lütken & Mortensen, 1899

Granja-Fernández, Rebeca, Hendrickx, Michel E., Rangel-Solís, Pedro Diego & López-Pérez, Andrés, 2023, Deep-sea Ophiuroidea (Echinodermata) collected during the TALUD cruises in western Mexico, Zootaxa 5259 (1), pp. 1-71 : 32-33

publication ID

https://doi.org/ 10.11646/zootaxa.5259.1.1

publication LSID

lsid:zoobank.org:pub:4306F52E-FD24-45B0-B307-66B71173D805

DOI

https://doi.org/10.5281/zenodo.7795105

persistent identifier

https://treatment.plazi.org/id/03AB87FA-FFBE-FFF5-FF7B-F8B6FB37FC02

treatment provided by

Plazi

scientific name

Ophiacantha costata Lütken & Mortensen, 1899
status

 

Ophiacantha costata Lütken & Mortensen, 1899 View in CoL

Fig. 8A‒F View FIGURE 8

Ophiacantha costata Lütken & Mortensen, 1899: 172‒173 View in CoL , pl. 16, fig. 10, pl. 17, figs. 4‒6.

Material examined. Two individuals at two stations. TALUD VIII, Sta. 11, 1 ind. (ICML-EMU-11695); TALUD XII, Sta. 28, 1 ind. (ICML-EMU-11700).

Comparative material. Syntypes, 9 ind.: MCZ OPH-1941 , MNHN 2013-10259 About MNHN , USNM 19573 About USNM , USNM 19574 About USNM (Supplementary file 2) .

Description (ICML-EMU-11700). DD = 6 mm. Disc interadii deeply indented. Dorsal disc covered by scales and short multifid spines. Primary plates not evident. RS slender, elongated, covered by multifid spines ( Fig. 8A View FIGURE 8 ). Ventral interradii very reduced, covered by imbricated scales and spines similar to those on the dorsal side ( Fig. 8B View FIGURE 8 ). OSh broader than long, diamond-shape with distal rounded edge. Madreporite swollen. AdSh longer than broad, semilunar; almost meeting or meeting in front of OSh. Jaws bearing five papillae at each side; AdShSp lanceolate; LOPa three, lanceolate, first the longest of all oral papillae, the rest slender; IPa pointed. vT longer than oral papillae ( Fig. 8C View FIGURE 8 ). Arms slender, gradually narrowing distally. First DAP reduced, covered by short multifid spines; subsequent DAP slightly longer than broad, bell-shaped with rounded edges; separated from each other by lateral plates ( Fig. 8D View FIGURE 8 ). VAP broader than long, pentagonal, separated from each other. LAP with six ArSp, large (approximately 1.5 arm segment in length), serrated, dorsalmost the longest and ventralmost the shortest. One elongated, pointed TSc ( Fig. 8E View FIGURE 8 ). Color pattern beige (ethanol preservation) ( Fig. 8A‒F View FIGURE 8 ).

Habitat and distribution. California, USA, Mexico, and Panama; 733‒ 1,271 m depth, sandy substrates (Lütken & Mortensen 1899; Maluf 1988). The material examined was collected in the southern Gulf of California and off Colima; 920‒ 1,106 m depth.

Remarks. The widely open genital slits ( Fig. 8B View FIGURE 8 ) in our examined material can be an artifact of preservation or a stress reaction to the fixing process (pers. comm. Sabine Stöhr, 2022). Previously recorded in the Gulf of California and off Marias Islands ( Granja-Fernández et al. 2015). The examined material collected off Colima corresponds to a new distribution record for this area and the southernmost record in the Mexican Pacific.

MCZ

Museum of Comparative Zoology

Kingdom

Animalia

Phylum

Echinodermata

Class

Ophiuroidea

Order

Ophiacanthida

Family

Ophiacanthidae

Genus

Ophiacantha

Loc

Ophiacantha costata Lütken & Mortensen, 1899

Granja-Fernández, Rebeca, Hendrickx, Michel E., Rangel-Solís, Pedro Diego & López-Pérez, Andrés 2023
2023
Loc

Ophiacantha costata Lütken & Mortensen, 1899: 172‒173

Mortensen, T. 1899: 173
1899
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