The sexes are separate in most species, though a few are hermaphroditic or protandric. The gonads are located in the disk, and open into pouches between the arms, called genital bursae. Fertilisation is external in most species, with the gametes being shed into the surrounding water through the bursal sacs. … See more Brittle stars, serpent stars, or ophiuroids (from Latin ophiurus 'brittle star'; from Ancient Greek ὄφις (óphis) 'serpent', and οὐρά (ourá) 'tail'; referring to the serpent-like arms of the brittle star) are echinoderms in … See more Of all echinoderms, the Ophiuroidea may have the strongest tendency toward five-segment radial (pentaradial) symmetry. The body outline is … See more Over 60 species of brittle stars are known to be bioluminescent. Most of these produce light in the green wavelengths, although a few blue-emitting species have also been … See more Between 2,064 and 2,122 species of brittle stars are currently known, but the total number of modern species may be over 3,000. This makes brittle stars the most abundant group of current echinoderms (before sea stars). Around 270 genera are known, these are … See more The ophiuroids diverged in the Early Ordovician, about 500 million years ago. Ophiuroids can be found today in all of the major marine provinces, from the poles to the tropics. Basket stars are usually confined to the deeper parts of this range; Ophiuroids are … See more Brittle stars use their arms for locomotion. Brittle stars move fairly rapidly by wriggling their arms which are highly flexible and enable the animals to make either snake-like or rowing movements. However, they tend to attach themselves to the sea floor or to sponges or … See more Brittle stars live in areas from the low-tide level downwards. Six families live at least 2 m deep; the genera Ophiura, Amphiophiura, and … See more Webbrittle star, also called serpent star, any of the 2,100 living species of marine invertebrates constituting the subclass Ophiuroidea (phylum …

Ophiothela mirabilis - Wikipedia

WebThat is, the internal organs of digestion and reproduction never enter the arms, as they do in the Asteroidea. Brittle stars are named for their ability to autotomize or voluntarily drop their arms if attacked by a predator. ... Brittle stars, serpent stars, or ophiuroids (from Latin ophiurus'brittle star'; from Ancient Greek (phis)'serpent ... WebCharacteristics [ edit] Ophiothela mirabilis is a very minute brittle star, which rarely reaches more than 1 cm including arms. It has in general 6 arms, however because of its mode of reproduction by division ( scissiparity ), its shape is often very irregular (one half more developed than the other, only 4 or 5 arms, or on the contrary 7 or 8 mexican food indianola ia

Brittle Stars and Basket Stars - ThoughtCo

Webechinoderms like the brittle star shown on the first page of this chapter be related to animals such as chordates which are primarily vertebrates 15 5 echinoderms and chordates concepts of biology openstax - Dec 28 2024 web aug 26 2010 echinoderms have a unique system for gas exchange nutrient circulation and WebThe brittle star Ophiothela mirabilis is epizoic, meaning it living nonparasitically on the exterior of a living animal. It occurs in and on colonies of sponges, corals, bryozoans, and tunicates. Its known mode … WebMcGovern, T. 2002. Patterns of sexual and asexual reproduction in the brittle star Ophiactis savignyi in the Florida Keys. Marine Ecology Progress Series, 230: 119-126. … mexican food indialantic fl