Three-horn Wartyback

Obliquaria reflexa

Diagnostics 5

SHELL

  • size: small, maximum 55 mm. most under 40 mm
  • thickness: thick to very thick
  • shape: overall circular, with squared/angular posterior and rounded anterior. posterior ridge pronounced
  • width: moderately inflated
  • surface: mid-shell row of prominent 3-5 large flattened knobs, in alternating positions on each valve. ribbing on posterior slope close to hinge
  • beaks: elevated, pointed and curved inwards. sculptures: knobby, much like rest of shell.
  • color/markings: greenish, tan or brown, occasionally with thin green rays
  • sexual dimorphism: none
  • pseudocardinal teeth: massive, deeply serrated
  • lateral teeth: short, sharply angled with pseudocardinals
  • nacre: white, irridescent in posterior

Soft parts: foot white

Similar species/lookalikes: easily identified by the single row of few, large alternating knobs in mid-shell, which is diagnostic for the taxon. it resembles the mapleleaf Quadrula quadrula, but that species has a second row of nodules located on the posterior ridge.

Sources and Credits

  1. (c) Doug Shelton, some rights reserved (CC BY-NC-ND), uploaded by Philippe Blais, https://www.inaturalist.org/photos/13030662
  2. (c) Brian Wulker, some rights reserved (CC BY-NC), https://www.inaturalist.org/photos/9703694
  3. (c) Michael Gras, M.Ed., some rights reserved (CC BY), uploaded by Michael J. Gras, M.Ed., http://www.flickr.com/photos/mikegras/9412585656/
  4. (c) Michael J. Gras, M.Ed., some rights reserved (CC BY), https://www.inaturalist.org/photos/5928652
  5. Adapted by Philippe Blais from a work by (c) Wikipedia, some rights reserved (CC BY-SA), http://en.wikipedia.org/wiki/Obliquaria_reflexa

More Info

iNatCA Map