What is a shape name for upper surface (colored black) of the cross-sectional shape in the attached image? It is a cross-section through a crayfish rostrum. It is horizontal and linear medially, but concave laterally. By shape name, I'm thinking of words along the lines of emarginate, cuspidate, etc: enter image description here

  • 3
    $\begingroup$ In what way is this a biology question? $\endgroup$
    – Domen
    Jun 24 at 18:10
  • $\begingroup$ This is a shape I see in a crayfish rostrum. It would be nice to describe it succinctly if possible. $\endgroup$
    – crayman9
    Jun 24 at 20:44
  • $\begingroup$ Then please edit the question and include this information in it, possibly with an image. $\endgroup$
    – Domen
    Jun 24 at 21:14
  • $\begingroup$ @crayman9 it would help if you could label the parts of the image or even use a drawing tool to make a better drawing. For instance are the 2 left and 2 right asterisks parts of the body or the claws? Is the line the ventrum of the animal? Which part of the animal was the section through. $\endgroup$
    – bob1
    Jun 24 at 22:57
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    $\begingroup$ Ok, I added a drawing. I didn't realize it was as simple as drag and drop. $\endgroup$
    – crayman9
    Jun 25 at 0:20


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