* * *
Universalium. 2010.
acanthodian — noun A member of a group of extinct fish (Acanthodii) that existed from the Silurian to the Permian period. The emerging picture of acanthodian (and perhaps placoderm) paraphyly does not overturn a general consensus about gnathostome… … Wiktionary
acanthodian — ac·an·tho·di·an … English syllables
acanthodian — /ˌækænˈθoʊdiən/ (say .akan thohdeeuhn) noun a primitive, spiny finned, shark like fish of the late Silurian and Devonian periods. {New Latin Acanthodes, genus name} …
acanthodian — … Useful english dictionary
Life Sciences — ▪ 2009 Introduction Zoology In 2008 several zoological studies provided new insights into how species life history traits (such as the timing of reproduction or the length of life of adult individuals) are derived in part as responses to… … Universalium
endoskeletal — adjective Of or pertaining to an internal skeleton, usually of bone (an endoskeleton). All of these studies have presupposed acanthodian monophyly and stereotyped acanthodian endoskeletal morphology on Acanthodes , the latest occurring, and a… … Wiktionary
monophyly — noun In cladistics, the condition of being monophyletic, of including all descendants from a given ancestral species. All of these studies have presupposed acanthodian monophyly and stereotyped acanthodian endoskeletal morphology on Acanthodes ,… … Wiktionary
Nerepisacanthus — Temporal range: Telychian–Ludlow … Wikipedia
acanthodean — I. adjective see acanthodian I II. noun see acanthodian II … Useful english dictionary
Silurian — Geological period from=444 middle=429 to=416 o2=14 co2=4500 temp=17The Silurian is a geologic period and system that extends from the end of the Ordovician period, about 443.7 ± 1.5 Ma (million years ago), to the beginning of the Devonian period … Wikipedia
