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Found 14 results

  1. fossilnut

    Modern skate skeleton

    Not sure where to post this request, so change as appropriate. The Maryland Natural History Society will be holding its annual Shark Fest in August. I volunteer there. As part of our educational displays, a skate skeleton would be useful for folks to see, feel the cartilage and to see the protective dermal denticles. I have looked on the internet but have not come up with with any. I looked on taxidermy sites and online. I wondered if any TFF members may have or can refer me to a person or site where such a skeleton or partial piece like a tail section would be available. Thanks for any help a
  2. Are pathological shark teeth random occurrences, genetic mutations, or the result of feeding damage? I understand that pathological extant shark teeth show deformities similar to pathological fossil shark teeth. I presume that most of what we know about the subject is based upon modern observations. Is a pathological tooth replaced by a normal one in the tooth replenishment process or is that file always going to produce a deformed tooth? Thoughts, ideas?
  3. I like to have extant teeth in my collection to contrast with fossil teeth of the same or similar species. I bought these teeth at a tourist shop in Las Vegas a few years ago. They had been made into necklaces. I thought they might be H. elongata based on the root shape and would be interesting to display along with my fossil H. serra teeth. I am not convinced my ID is correct, especially considering the serrations go all the way to the tip. Any ideas?
  4. Does anyone keep extant shark teeth in their fossil shark teeth collections for comparison and reference? Is it poor form to ask for an ID on this forum of an extant tooth to see if it is related to a fossil tooth?
  5. here Sana KHEMIRI Sana, François J.Meunier , Michel LAURIN,Louise ZYLBERBERG Morphology and structure of the scales in the Gadiformes (Actinopterygii: Teleostei: Paracanthopterygii) and a comparison to the elasmoid scales of other Teleostei Cah. Biol. Mar. (2001) 42 : 345 - 362 DOI: 10.21411/CBM.A.FBAB4704 about 22 Mb CONTAINS cladograms (no pictorial outtakes possible,BTW,alas) When reputable vertebrate histologists get together,this is what you get
  6. doushantuo

    true to scale

    here A scale atlas for common Mediterranean teleost fishes Zsuzsanna Bräger ,Timo Moritz Vertebrate zoology,66(3)/2-16
  7. doushantuo

    gars

    WIL The Phylogeny and Biogeography of Fossil and Recent Gars (Actinopterygii: Lepisosteidae) E. O. Wiley University of Kansas museum of Natural History Misc.Publ. 64 1976 because it's E.O.Wiley: cladistics! HIGHLY recommended,it doesn''t get any better than this,but: the scans are good,but NOT top-notch about 11 MB fig 36:holotype skull of L.Indicus
  8. A highly diverse molluscan assemblage associated with eelgrass beds (Zostera marina L.) in the Alboran Sea: Micro-habitat preference, feeding guilds and biogeographical distribution José L. Rueda, Serge Gofas, Javier Urra and Carmen Salas Scientia Marina 73(4) December 2009, 679-700 ruedamollusca1137.pdf size :3.1 MB
  9. doushantuo

    lucinids

    DIJK John.D.Taylor and Emily A.Glover Hanging on-lucinid bivalve survivors from the Paleocene and Eocene in the Western Indian Ocean(Bivalvia:Lucinidae) Zoosystema,2018/v.40-7 about 6.2 MB RECOMMENDED! New genus: Retrolucina(previously Eomiltha) http://zoobank.org/urn:lsid:zoobank.org:act:DAFC3EBA-0C19-4D63-8248-65A6F761670A
  10. A post by @ynot on STH teeth a while back peaked my interest in extant sawfish rostral teeth. The two extant sawfish genera are Pristis and Anoxypristis. There is only a single extant Anoxypristis species, Anoxypristis cuspidata (Knifetooth or Narrow Sawfish). There are 4 extant species of Pristis, Pristis clavata (Dwarf Sawfish), Pristis pectinata (Smalltooth Sawfish), Pristis pristis (Largetooth Sawfish), and Pristis zijsron (Green Sawfish) Last 2016. I borrowed a Pristis pectinata (Smalltooth Sawfish) rostrum from a friend so I could take pictures of it. This rostrum is from a sawfi
  11. I have a large collection of extant shark and ray jaws that I use to understand tooth features. However, a number of tooth features, especially tooth root features, are really hard to see in jaws. So I’ve started to purchase (40+ species to date) and photograph individual teeth of a number of extant shark species. I’ll try to post some of the pictures (labial and lingual views) as I take them. This is another post of three extant species that most collectors don’t see. Centroscymnus coelioepis (Portuguese Dogfish Shark) Upper teeth (5 mm, 2 mm, & 4.5 mm):
  12. I have a large collection of extant shark and ray jaws that I use to understand tooth features. However, a number of tooth features, especially tooth root features, are really hard to see in jaws. So I’ve started to purchase (40+ species to date) and photograph individual teeth of a number of extant shark species. I’ll try to post some of the pictures (labial and lingual views) as I take them. For this post I’ll post three extant species that most collectors don’t see. Glyphis gangeticus (Ganges Shark) Upper teeth (23 mm, 23 mm, & 21 mm):
  13. A post by YNOT @ynot on STH teeth peaked my interest in extant sawfish rostral teeth. The two extant sawfish genera are Pristis and Anoxypristis. There is only a single extant Anoxypristis species, Anoxypristis cuspidata (Knifetooth or Narrow Sawfish). There are 4 extant species of Pristis, Pristis clavata (Dwarf Sawfish), Pristis pectinata (Smalltooth Sawfish), Pristis pristis (Largetooth Sawfish), and Pristis zijsron (Green Sawfish) Last 2016. I borrowed an Anoxypristis cuspidata rostrum from a friend so I could take pictures of it. The rostrum is 18” long and is shown bel
  14. Here is a Hemipristis elongatus (Snaggletooth Shark) jaw that I recently acquired. The jaw is 5.25” wide and 3.25” inches high. Here is the overall jaw: To better see tooth details double clique the below pictures. If you mouse over the pictures you will see the file name which has additional positional information. Hemipristis elongatus jaws must be weak at the symphysis because a lot of the jaws for sale have distortion to both the upper and lower symphysis. The identification and number of tooth files discussed below are based upon Compagno 1988. Hemipristis e
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