A chordate (/ ˈ k ɔːr d eɪ t /) is an animal of the phylum Chordata.During some period of their life cycle, chordates possess a notochord, a dorsal nerve cord, pharyngeal slits, an endostyle, and a post-anal tail: these five anatomical features define this phylum.Chordates are also bilaterally symmetric, and have a coelom, metameric segmentation, and circulatory system. Porifera is the name of the phylum that consists of sponges, the multicellular animals without most of the vital body organ systems such as nervous, digestive, or circulatory systems.
PHYLUM: PORIFERA Authors Touiek Samaai 1, Robyn Payne2, Seshnee Maduray , and Liesl Janson Citation Samaai T, Payne RP, Maduray S and Janson L. 2018. Phylum Porifera In: Atkinson LJ and Sink KJ (eds) Field Guide to the Ofshore Marine Invertebrates of South Africa, From Porifera to Chordata, animals have come a long way. Based on the embryological studies, sponges are prooved as animals and are classified into a separate Phylum in the animals.
Phylum Porifera is very primitive and basic. Bilateral symmetry is not unique to chordates. Characteristics of Chordata. 1.
The word “Porifera” mainly refers to the pore bearers or pore bearing species.
Animals in the phylum Chordata share four key features that appear at some stage during their development: a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail (Figure 2). In some groups, some of these are present only during embryonic development. Phylum Porifera are the lowest multicellular animals belonging to the kingdom Animalia. This phylum includes about 5000 species. Sponges, the members of the phylum Porifera (/ p ə ˈ r ɪ f ər ə /; meaning "pore bearer"), are a basal Metazoa (animal) clade as a sister of the Diploblasts. Chordates are bilaterally symmetrical, which means there is a line of symmetry that divides their body into halves that are roughly mirror images of each other. Phylum - Chordata - Division In Vertebrata: Cyclostomata, Pisces, Chondrichthyes, Osteichthyes, Amphibia, Amphibia, Reptilia, Aves, Mammalia. Porifera means pore bearer in Latin, which is mainly because poriferans do have a lot of pores on their body. Sea sponges are multicellular, but not all of the cells its made of work together, instead, they each have a job to keep the sponge alive and reproducing. Sea sponges have no symmetry or cephylization and have no organs. Source | Credits | Picture Credits: NCERT General Science Phylum - Chordata Animals belonging to phylum Chordata are fundamentally characterised by the presence of a notochord, a dorsal hollow nerve cord and paired pharyngeal gill slits.
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