Definition of Retrochoanitic. Meaning of Retrochoanitic. Synonyms of Retrochoanitic

Here you will find one or more explanations in English for the word Retrochoanitic. Also in the bottom left of the page several parts of wikipedia pages related to the word Retrochoanitic and, of course, Retrochoanitic synonyms and on the right images related to the word Retrochoanitic.

Definition of Retrochoanitic

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Meaning of Retrochoanitic from wikipedia

- used Agonititida. Agoniatitids are primitive ammonoids with a ventral retrochoanitic siphuncle (septal necks point to the rear) reflective of their nautiloid...
- or sometimes trifurcate. The siphuncle is proportionally large and retrochoanitic (meaning the septal necks point toward the beginning of the s****);...
- the end of the second whorl. In all species septal nacks are short retrochoanitic (point adapically) in the first whorl, are transitory in the second...
- within the first few whorls to become ventral. Septal necks start off retrochoanitic, pointing to the rear, but by the beginning of the third whorl are prochoanitic...
- discoidal (disc-shaped) to thinly lenticular (lens-shaped). They retained a retrochoanitic siphuncle, a simple form with septal necks extending backwards. As is...
- subclass: externally s****ed cephalopods with simple concave septa and retrochoanitic siphuncles from which the convexly septate Ammonoidea with prochoanitic...