Titlebook: Evolutionary Developmental Biology of Invertebrates 2; Lophotrochozoa (Spir Andreas Wanninger Textbook 2015 Springer-Verlag Wien 2015 embry

散步

佛刊

eczema

sigmoid-colon

Nemertea,cters that unequivocally qualify Nemertea as monophyletic are the ring-shaped brain surrounding the proboscis insertion instead of the esophagus, a pair of laterally located longitudinal medullary cords, and an endothelialized blood-vascular system. Apart from that nemertean anatomy is marked by cha

violate

Annelida,r taxon of all other annelids. Given this hypothesis, it has to be assumed that the early diversification of extant annelids took place at least in the Lower Cambrian (520 Ma ago) (Weigert et al. 2014). The phylogenetic position of Myzostomida, a group of commensals or parasites of echinoderms (and,

Conscientious

使隔離

Brachiopoda,structure called the pedicle. Rhynchonelliform brachiopods are often attached to hard substrata by the rigid pedicle with their ventral valves oriented upward. The shells of linguliform brachiopods such as . and . generally have equally sized valves and their pedicles are long, muscular structures m