Definition of Protostomes. Meaning of Protostomes. Synonyms of Protostomes

- the blastopore among protostomes is extremely variable; while the evolutionary distinction between deuterostomes and protostomes remains valid, the descriptive...
- while many protostomes (the Spiralia) undergo spiral cleavage. Animals from both groups possess a complete digestive tract, but in protostomes the first...
- distinguishes them from protostomes, which have a variety of patterns of development. In both deuterostomes and protostomes, a zygote first develops...
- the mouth in protostomes, and the **** in deuterostomes. Many taxonomists now recognize at least two more superphyla among the protostomes, Ecdysozoa and...
- appears to have happened at least twice, following different paths in protostomes and deuterostomes. This accompanied or facilitated other important evolutionary...
- organized as in a coelomate. All pseudocoelomates are protostomes; however, not all protostomes are pseudocoelomates. An example of a pseudocoelomate...
- basis for separating bilaterian animals into two natural groupings: the protostomes and deuterostomes. In animals at least as complex as an earthworm, a...
- sperm, and their embryos do not undergo spiral cleavage as in most other protostomes. Ancestrally, the group exhibited sclerotized teeth within the foregut...
- in ontogeny is a criterion used to classify bilaterian animals into protostomes and deuterostomes. In the first multicellular animals, there was probably...
- between protostomes and deuterostomes is based on the direction in which the mouth (stoma) develops in relation to the blastopore. Protostome derives...