Starfish to starfish by the French zoologist de Blainville in 1830. It is derived from the Greek "aster", ἀστήρ (a star) and the Greek "eidos", εἶδος (form, likeness, appearance). The class Asteroidea belongs to the phylum Echinodermata. As well as the starfish, the echinoderms include sea urchins, sand dollars, brittle and basket stars, sea cucumbers and crinoids. The larvae of echinoderms have bilateral symmetry, but during metamorphosis this is replaced with radial symmetry, typically pentameric. Adult echinoderms are characterized by having a water vascular system with external tube feet and a calcareous endoskeleton consisting of ossicles connected by a mesh of
Jaliscan spiny pocket mouse Jaliscan spiny pocket mouse The Jaliscan spiny pocket mouse ("Heteromys spectabilis") is a species of heteromyid rodent endemic to Mexico. The specific name "spectabilis" means "striking", and refers to the animal's relatively bright coloration. It was formerly placed in the genus "Liomys", which is now recognized to be paraphyletic and has been subsumed into "Heteromys". The Jaliscan spiny pocket mouse is a relatively large member of its genus, measuring in head-body length, with a tail about the same length again. Adult males weigh about on average, while females are significantly smaller, weighing on average. The fur is reddish brown over