Chlamydoselachiformes
The frilled shark (Chlamydoselachus anguineus) and the southern African frilled shark (Chlamydoselachus africana) are the two extant species of shark in the family Chlamydoselachidae. The frilled shark is considered a living fossil, because of its primitive, anguilliform (eel-like) physical traits, such as a dark … See more The zoologist Ludwig Döderlein first identified, described, and classified the frilled shark as a discrete species of shark. After three years (1879–1881) of marine research in Japan, Döderlein took two specimen sharks to … See more The eel-like bodies of C. anguineus and C. africana differ anatomically; C. anguineus has a longer head and shorter gill slits, a spinal column with more vertebrae (160–171 vs. 147), and a lower-intestine spiral valve with more turns (35–49 vs. 26–28) than does … See more In pursuit of food, the frilled shark usually is a bycatch of commercial fishing, accidentally caught in the nets used for trawl-, gillnet-, and longline-fishing. In Japan, at Suruga … See more The habitats of the frilled shark include the waters of the outer continental shelf and the upper-to-middle continental slope, favoring upwellings and other biologically productive areas. Usually, the shiver lives close to the ocean floor, yet its diet of cephalopods, smaller sharks, and See more A cartilaginous skeleton and a large liver (filled with low-density lipids) are the mechanical means with which the frilled shark controls and maintains its buoyancy in the deep waters of the ocean. The shark has an open, lateral-line organ system featuring See more • Sharks portal • List of sharks See more • ABC News video • Chlamydoselachus anguineus, Frilled shark at FishBase • Deep Sea: Frilled Shark at ReefQuest Centre for Shark Research See more WebThis fauna consists of 30 species belonging to 26 genera and is characterised by a large number of new elasmobranch taxa (17 species, 7 genera and 2 families); all these principally belong to the ...
Chlamydoselachiformes
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WebBased on tooth morphology the Chlamydoselachiformes and Echinorhiniformes, both as separate orders, are contrasted with the orders Hexanchiformes (with a new family … WebAmong most ancient of surviving neoselachian lineages are the cow and frilled sharks (orders Hexanchiformes and Chlamydoselachiformes, respectively). Cow sharks are represented in the fossil record by their characteristic cockscomb-shaped lower teeth, dating as far back as the early Jurassic Period, about 190 million-years ago.
WebA chlamydospore is the thick-walled large resting spore of several kinds of fungi, including Ascomycota such as Candida, Basidiomycota such as Panus, and various Mortierellales species. It is the life-stage which … http://elasmo-research.org/education/evolution/rise_modern.htm
WebJan 1, 1983 · This monograph deals with the morphology of the teeth and dermal denticles of the recent and fossil squalomorph sharks of the orders … WebChlamydoselachus is a genus of sharks and the sole extant member of the family Chlamydoselachidae, in the order Hexanchiformes. It contains two extant and several extinct species. The most widely known species still …
WebThe Heterodontiformes (Bullhead or Horn Sharks) are a small group of sharks with one family (Heterodontidae) and a single genus (Heterodontus) of nine similar looking species, one species, the Horn Shark Heterodontus francisci occurs in the NEP. From: Advances in Marine Biology, 2024 View all Topics Download as PDF About this page
The Hexanchiformes /hɛkˈsæŋkɪfɔːrmiːz/ are the order consisting of the most primitive types of sharks, and numbering just seven extant species. Fossil sharks that were apparently very similar to modern sevengill species are known from Jurassic specimens. Hexanchiform sharks have only one dorsal fin, either six or seven gill slits, and … ion mass spectrometerWeb暨南大学,数字图书馆. 开馆时间：周一至周日7:00-22:30 周五 7:00-12:00; 我的图书馆 on the bottom meaningWebThe species also differ in the arrangement of the cristae, position of the basal tubercle and the angle between crown and root in lateral view. Based on nine features, the five species are analysed in a cladistic way. This provisional diagram of synapomorphs is transferred into a cladogram which, however, still leaves many questions unanswered. ionman creamWebSclerorhynchoidei is an extinct suborder of rajiform rays that had long rostra with large denticles similar to sawfishes and sawsharks.This feature was convergently evolved and their closest living relatives are actually skates. While they are often called "sawfishes", sawskates is a more accurate common name for sclerorhynchoids. The suborder … on the bottom rung of the ladderWebThe meaning of CHLAMYDOSELACHUS is a genus (coextensive with the family Chlamydoselachidae) comprising sharks with diplospondylic vertebrae, including the … ion marlin smartportWebChlamydoselachus Order Hexanchiformes Family Hexanchidae Heptranchias Hexanchus Family Notorynchidae Notorynchus Order Echinorhiniformes Family Echinorhinidae Echinorhinus Order Dalatiiformes Family Etmopteridae Aculeola Centroscyllium Etmopterus Miroscyllium Trigonognathus Family Somniosidae Centroscymnus Mollisquama … on the bottom in spanishWebAmong the survivors are the cow sharks (Hexanchiformes) and the frilled sharks (Chlamydoselachiformes), which still bear much resemblance to their extinct relatives. The origin of modern sharks dates back 100 million … on the bottom shelf