- s****y plate, now
understood to be part of the body of an ammonite.
Paired aptychi have, on rare occasions, been
found at or
within the
aperture of ammonite...
-
termed the
aptychus or
aptychi in the case of a pair of plates, and
anaptychus in the case of a
single plate. The
paired aptychi were
symmetric to one...
- squids, octopuses, belemnites, and vampyromorphs.[excessive citations]
Aptychi –
paired plate-like
structures found in
ammonites – may also have been...
- s****ed cephalopods), a
calcareous structure known as the
aptychus (plural
aptychi) existed. When
these were
first described they were
thought to be valves...
-
usually not phylloid,
lobes tend to be more
jagged with
thornlike endings.
Aptychi are
single valved and
concentrically striated (Anaptychus) The Lytoceratina...
-
diverse forms,
generally with
sharp ribbing and
complex suture lines.
Aptychi are
believed to be
mostly granular (Granulaptycus) or
concentrically ribbed...
- "Paleobiology
Database - Himalayitidae".
Retrieved 2017-10-19.
Ammonites and
aptychi. LF Spath, 1925 Data
related to
Himalayitidae at
Wikispecies Media related...
- list (link) Zell,P., Stinnesbeck, W., Beckmann,S. (2016). "Late Jur****ic
aptychi from the La Caja
Formation of
northeastern Mexico". Boletín de la Sociedad...
- Zacatecas. Zell,P.; Stinnesbeck, W.; Beckmann,S. (2016). "Late Jur****ic
aptychi from the La Caja
Formation of
northeastern Mexico" (PDF). Boletín de la...
-
supported by an
aptychus (body part of an ammonite)
found within the slab;
aptychi are
almost always embedded with
their concave sides pointing upwards. However...
