설명Trilobite hypostome types based on attachment (labeled).png
English: The three different types of hypostome attachment to the ventral cephalic plate in trilobites. A – Natant: Hypostome not attached to doublure. Aligned with front edge of glabella. B – Conterminant: Hypostome attached to rostral plate of doublure. Aligned with front edge of glabella. C – Impendent: Hypostome attached to rostral plate but not aligned to glabella.
2011-04-14T10:47:03Z Obsidian Soul 3127x910 (208228 Bytes) {{Information |Description={{en|1=The different types of trilobites hypostome (ventral cephalic plate). A - Natant: Hypostome not attached to doublure. Aligned with front edge of glabella (shown in red broken lines) B - Cont
{{Information |Description={{en|1=The different types of trilobites hypostome (ventral cephalic plate).<br/> A - Natant: Hypostome not attached to doublure. Aligned with front edge of glabella (shown in red broken lines) <br/> B - Conterminant: Hypostome