1) Are Lepidosaurs and Archosaurs are monophylum?
2) What are tunicates? Are they vertebrates? Are they chordates? If so, how do we know? How do tunicates feed as adults?
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The term monophylum mainly refers to a hierarchical community / group of organisms including a common ancestral species and followed by all its descendants.
- Lepidosaurs
-Lepidosaurs term has been derived from a Greek word meaning scaled lizards.
-These are the reptiles like organisms with overlapping scales.
-It is a monophyletic group, belonging to phylum Chordata and thus comprises all the descendants of a common ancestor.
- This suborder contains over 9000 species like snakes, lizards, tuatara.
- The latest common ancestor of Squamata and the existing rhynchocephalian (Sphenodon) may be described as lepidosauria.
Systematic Position
Domain - Eukaryotes
Kingdom - Animalia
Phylum - Chordata
Class - Reptilia
Clade - Lepidosauromorpha
Suborder - Lepidosauria
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