WebThey are the only known hard parts of an extinct group of animals believed to be distantly related to the living hagfish. General morphology. Conodonts are generally preserved as minute discrete, often denticulate (having tooth-like projections) elements of 0.3 mm to 3 mm in length, with a shape varying from coniform (tooth-like) to ramiform ... WebA basic problem faced by the agnathans in evolution was how to feed and breathe …
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WebOct 16, 2024 · Hagfish are eel-shaped, slime-producing marine fish that live their lives eating mostly dead flesh of fallen ocean victims. They can also burrow their way into living marine creatures ! These critters use their … WebMay 29, 2024 · The second group of living agnathans is the hagfish. Hagfish are scavenger species that feed off dead and wounded organisms in the ocean. ... They are fishlike animals with cartilaginous skeletons and well-developed sucking mouthparts with horny teeth. The only living agnathans are lampreys and hagfishes (class … progressive high school dean
BIO 370 Exam 1 Flashcards Quizlet
WebHagfish definition, any eellike, marine cyclostome of the order Myxiniformes, having … WebAlso known as insects Tagmata: Head, thorax, & abdomen One pair of antennae Mouthparts: Mandibles & maxillipeds Females have a two-part ovipositor at end of abdomen. Phylum: Echinodermata ... Chordata Subphylum: Craniata Class: Myxini Known as a hagfish, they lack jaws and lack bony vertebrae. Partial skull, skeleton composed of … Web3. External Features of Lamprey: The body comprises a cylindrical head and trunk and laterally flattened tail. The paired fins are absent, but the tail bears a median fin, which is expanded in front as a dorsal fin. In female the anal fin is present while in male copulatory papilla is found. progressive high risk auto insurance