WebFeb 23, 2024 · lamprey: [noun] any of a family (Petromyzontidae) of eel-shaped freshwater or anadromous jawless fishes that include those cyclostomes having well-developed eyes and a large disk-shaped suctorial mouth armed with horny teeth — called also#R##N# lamprey eel. WebLampreys (Petromyzontoidea or petromyzontids) belong to the cephalaspidomorphi class that comprises a single family Petromyzontidae (including 9 genera and 41 species), whereas hagfishes (Myxinoidea or myxinoids) are included in the Myxini class that comprises two families: Eptatretidae and Myxinidae (with 5 genera and about 60 species).
Stephanie Pylypko, MD Inova
WebFamily: Petromyzontidae - Lampreys have a skeleton made of cartilage and a long, tube-shaped body. They have seven gill openings on each side of the head. These animals lack pectoral and pelvic fins, have only one nostril and no jaws. Some lampreys do not feed as adults while others act as a parasite on fishes, attaching with their mouth and ... http://deeplyfish.com/wp-content/uploads/2024/03/Family-Petromyzontidae-PDF.pdf crossing over increases
Lamprey (Family Petromyzontidae) Diversity in North …
WebFamily . Petromyzontidae is the single extant family in Petromyzontiformes and includes eight lamprey genera. The lampreys are typically easily identified, as they are cylindrical, elongated, eel-like fish that lack a jaw and paired fins. The lampreys have seven oval gill openings and only two semicircular canals in the ear (Ross 2001). WebHyperoartia. Hyperoartia or Petromyzontida is a disputed group of vertebrates that includes the modern lampreys and their fossil relatives. [1] [2] Examples of hyperoartians from early in their fossil record are Endeiolepis and Euphanerops (which possessed a calcified branchial basket), [3] fish-like animals with hypocercal tails that lived ... Web1.1 Family Petromyzontidae. 2 Acipenseriformes. Toggle Acipenseriformes subsection 2.1 Family Acipenseridae. 3 Clupeiformes. Toggle Clupeiformes subsection 3.1 Family Clupeidae. 4 Cypriniformes. Toggle Cypriniformes subsection 4.1 Family Catostomidae. 4.2 Family Cobitidae. 4.3 Family Cyprinidae. crossing over increase genetic diversity