I've found that many paleontologists have been loose and fancy-free with batoid teeth. The paleontological genera "Raja", "Dasyatis" and particularly "Myliobatis" are catch-all buckets. The only author (available to me) that appeared to make an attempt, to seriously differentiate these teeth, was Henri Cappetta (1987). Identifying Miocene batoid teeth from Lee Creek was a challenge.

Using Cappetta as a guide, attention was directed to teeth of living batoids. Most ichthyologists studying extant batoids pay/paid little attention to the odontological design of the teeth -- Herman, et al, (1986-present), Notarbartolo di Sciara (1987) are exceptions, Other than functional studies or cursory descriptions of the dentitions (i.e. Bigelow & Schroeder, 1953) there is a distinct void in the information available on the teeth of extant batoids.

With little background material available on the subject, I started looking at batoid dentitions, taking notes and making sketches. This early research first appeared in a series of articles in the NJPS Paleontograph. Subsequent research has become more detailed. The accompanying webpages track this evolution of this research and may prove useful to others following a similar tact.

 RHINOBATIDAE   —   Guitarfishes
  Rhinobatos (FOSSIL) Guitarfishes
  R. productus Shovelnose guitarfish
 RHINIDAE   —   Wedgefishes
  Rhynchobatus (FOSSIL)Wedgefish
  Rhynchobatus djiddensis Whitespotted wedgefish
 RAJIDAE   —   Skates
  "Raja" (FOSSIL)Skates
  "Raja" (LEE CREEK)Skates
  Raja laevis Barndoor skate
 PRISTIDAE (RECENT)   —   Sawfishes
  Anoxypristis (FOSSIL)Cenozoic sawfish
  Pristis (FOSSIL)Cenozoic sawfish
 SCLERORHYNCHIDAE   —   Extinct Sawfishes
  IschyrhizaCretaceous sawfish
  SclerorhynchusCretaceous sawfish
  PtychotrygonCretaceous sawfish
  BorodinopristisCretaceous sawfish
 Incertae sedis  —   undetermined ?rajiform
  EwingiaCretaceous ?rajiform
  PseudohypolophusCretaceous ?rajiform
 DASYATIDAE (RECENT)   —   Whiptail Stingrays
  CoupateziaPaleogene stingray
  "Dasyatis" (FOSSIL & RECENT)Cenozoic stingrays
  "Dasyatis" (LEE CREEK) Mio-Pliocene stingrays
  Dasyatis americanaSouthern stingray
  Dasyatis sabina Atlantic stingray
  Pteroplatytrygon violacea Pelagic stingray
  HypolophodonPaleogene stingray
  TexabatisCretaceous stingray
 GYMNURIDAE   —   Butterfly rays
  Gymnura (FOSSIL & RECENT)Miocene butterfly ray
  JacquhermaniaPaleogene butterfly ray
 MYLIOBATIDAE   —   Eagle rays
  Aetobatus (RECENT)Bonnet ray
  Aetobatus (NEOGENE)Neogene bonnet ray
  Aetobatus (PALEOGENE)Paleogene bonnet ray
  Aetomylaeus (RECENT)Smooth-tail eagle ray
  BrachyrhizodusCretaceous myliobatoid
  Myliobatis (RECENT)Eagle ray
  Myliobatis (NEOGENE)Neogene eagle ray
  "Myliobatis" (PALEOGENE)Paleogene eagle rays
  Pseudaetobatus Paleogene myliobatid
  Pteromylaeus (RECENT)Bull ray
  Ptermoylaeus (NEOGENE)Neogene bull ray
  RhombodusCretaceous myliobatoid
 RHINOPTERIDAE   —   Cow-nose rays
  Rhinoptera (RECENT & FOSSIL)Cow-nose ray
 MOBULIDAE   —   Devil rays
  ArchaeomantaPaleogene mobulid
  BurnhamiaPaleogene mobulid
  EomobulaPaleogene ?mobulid
  Manta (RECENT) Manta ray
  Manta hyneiExtinct manta ray
  Mobula (RECENT)Devil ray
  Mobula cf loupianensisExtinct devil ray
  ParamobulaExtinct devil ray
  Plinthicus stenodonExtinct devil ray
 Incertae sedis   —   undetermined myliobatoid
  MeridianiaPaleogene stingray