Filogenia de los equinodermos. Los cordados invertebrados. Respuesta a los estímulos. Locomoción. Reproducción y desarrollo. Laboratorio de Sistemática y Ecología de Equinodermos, Instituto de Ciencias Hernández-Herrejón LA () Filogenia del género Ophioderma Müller and . de la composición faunistica de los anélidos poliquetos y equinodermos Morelia, México Hernández-Herrejón LA () Filogenia del género Ophioderma.
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First record of Ophioderma ensiferum Echinodermata: Ophiuroidea from the southeastern continental shelf of the Gulf of Mexico and from an anchialine cave.
Primer registro de Ophioderma ensiferum Echinodermata: These records expand the known distribution of the species to the southern part of the continental shelf of the Gulf of Mexico.
This finding represents the first record of this ophiuroid on the equinnodermos shelf of Mexico, and also the first record of this species filovenia an anchialine cave.
Each jaw holds a group of oral papillae, wider than long, and 3 to 5 teeth. Four bursal slits are present in each interradius. In the Atlantic Ocean, at least 11 species of Ophioderma occur Hendler et eqkinodermos. Some species of this genus i. Ophioderma ensiferum Hendler and Miller, is a shallow water subtropical brittlestar 11 to 24 m depth previously recorded only in 2 different places belonging to the marine ecoregions of the Western Caribbean and the Greater Antilles, which are part of the Tropical Northwestern Atlantic province according to the bioregionalization of Spalding et al.
Recently August and JulyO. These 2 records constitute the first time that O. The first location was Alacranes Reef according to Spalding et al. Cenote Aerolito, is located close in the western coast of Cozumel, m gilogenia the shore.
Ophioderma ensiferum Hendler and Miller, Diagnosis modified Hendler and Miller, Oral shields pentagonal, slightly wider than long length: Most of surface of adoral shields free of granules. Jaws bearing 16 to 19 oral papillae. Dorsal arm plates not fragmented.
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Arm spines thin, slightly flattened laterally, bearing a maximum of 7 arm spines and 2 tentacle scales. Ventralmost arm spine thicker and longer than the dorsal, and reaches the base of the ventral spine on the adjacent arm segment.
Lacks bare scales at the base of the arms and lacks scales between the arm and distal genital slit. In life, brilliantly pigmented with deep-pink disc and yellow arms; tube foot with shaft pale reddish-orange and red tip. Holotype preserved in alcohol and dried: Ophioderma ensiferum Hendler and Miller, Fig. Disc covered with granules slightly separated each other. Radial shields oval, longer than wide, covered by the same granules that cover the disc Fig. Oral shields triangular with rounded angles, as wide as long.
Adoral shields are not covered by granules. eauinodermos
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The oral shields are pentagonal shaped. Each jaw has between 16 – 17 oral papillae, the 2 apical papillae are longer and pointed, and the 2 most distal are largest and almost rounded. Madreporite large, circular and distal equinodermod one oral shield.
Two genital slits on each side of the arms. Proximal slit extending from the base of the oral shield that reaches the half of the second arm segment and the distal slit extending from the fifth to seventh arm segment Fig. Longest arms mm and Dorsal arm plates wider than long, not fragmented Fig. Lateral arm plates shaped like a half circle, there are flattened arm spines, separated and long, the ventral ones longer than the dorsal ones, and reach the tentacle scale on the adjacent segment.
Two tentacle scales covering a tentacular pore.
Ventral arm plates are longer than wide Fig. Other echinoderms collected in Alacranes Reef were: Ophiactis quinqueradia Ljungman,O. Ophioderma ensiferum was found above a living eqiinodermos structure of the genus Montastreain a night dive, around 9 pm. The habitat inside the anchialine cave where we found O.
The specimen was moving on the muddy bottom. The pigmentation of the arms of O. The specimen from Cenote Aerolito showed the same coloration pattern as the holotype Fig.
A review of the existing literature indicates that Ophioderma is exclusively gonochoric, with each species exhibiting a single annual reproductive cycle that may result in a single or multiple spawning events Hendler, ; Hagman and Vize, We propose that the dispersion of the larvae was favored by the movement of currents from the Caribbean Sea.
A fraction of the water turns westward equinoderms the Campeche Bank reaching the Alacranes reef, constituting the main water mass in the region Capurro, To Tania Pineda for the photographs of the preserved specimen. Financial support came from Project Conacy-Semarnat No. Analysis of flow variability in the Yucatan Channel.
Journal of Geophysical Research C12, doi: Cinco registros nuevos de ofiuroideos Echinodermata: Equinodermos Echinodermata del Caribe Centroamericano. Cahier de Equinoddrmos Marine First records of polychaetous annelids from Cenote Aerolito sinkhole and anchialine cave in Cozumel Island, Mexico.
Journal of Cave and Karst Studies Mass spawning by two brittle star species, Ophioderma rubicundum and O. Bulletin of Marine Science Western Atlantic Ophiolepis Echinodermata: In Reproduction of marine invertebrates, volume VI, A.
The Boxwood Press, California. Ophioderma devaneyi and Ophioderma ensiferumnew brittlestar species from the western Dde Echinodermata: Proceedings of eauinodermos Biological Society of Washington Echinoderms of the Rhomboidal Cays, Belize: Atoll Research Bulletin Echinoderms in an anchialine cave in Mexico.
Key to the common shallow-water brittle stars Echinodermata: Ophiuroidea of the Gulf of Mexico and Caribbean Sea. Caribbean Journal of Science Marine Ecology Progress Series Marine ecoregions of the world: Vlaams Instituut voor de Zee. Potential cryptic speciation in Mediterranean populations of Ophioderma Echinodermata: Larval swimming and substrate selection in the brittle star Ophioderma brevispinum.
In Reproduction, genetics and distributions of marine organisms: Olsen and Olsen, Fredensborg, Denmark. Literature cited Abascal, Eqyinodermos.
Circuito exterior, Ciudad Universitaria, Del.