| the phylogenetic odyssey of the erythrocyte. ii. the early or invertebrate prototypes. | freely existing hemoglobin-bearing cells suspended in a plasmic milieu (erythrocytes) are found in a relatively small number of taxanomically scattered invertebrates. these species include some annelids, echiurids, molluscs, phoronids, nemerteans and echinoderms, e.g. pista pacifica, urechis caupo, noetia ponderosa, phoronis australis, lineus fuscoviridis and cucumaria miniata respectively. the typical invertebrate erythrocyte (hemocyte, coelomocyte) can be described as permanently nucleated, co ... | 1990 | 2134404 |