(Original description ) The subulate shell is greyish white, painted with an indistinct whitish, infra-sutural, spiral band, semi-transparent.
22.
Westermann ( 1965 ) tentatively placed " Ermoceras " in the Thamboceratidae, based on sutural morphology, removing it from the Stephanoceratidae where it was previously included.
23.
This is supported by the observation that the component elements of the skull exhibit complete sutural fusion, the fossils exhibit a pitted bone texture, and are deeply vascularized.
24.
The first lateral saddles in the suture are diphyllic, with two terminal branches, others exposed sutural saddles are diphyllic or triphyllic, those covered by successive whorls being monophyllic.
25.
"' Lytoceratina "'is a ammonites that produced loosely coiled, evolute and gyroconic shells in which the sutural element are said to have complex moss-like endings.
26.
It is important to realize that through anatomical variation it is common for the skeleton to have many extra bones ( sutural bones in the skull, cervical ribs, lumbar ribs and even extra lumbar vertebrae ).
27.
The most common variations include sutural ( wormian ) bones, which are located along the sutural lines on the back of the skull, and sesamoid bones which develop within some tendons, mainly in the hands and feet.
28.
The most common variations include sutural ( wormian ) bones, which are located along the sutural lines on the back of the skull, and sesamoid bones which develop within some tendons, mainly in the hands and feet.
29.
Above these are several hair-like lines, which become feebler toward the middle of the whorl and strong again above, the upper whorls presenting one in particular, which connects the row of infra-sutural beads.
30.
This species is a variable form, which, however may be readily recognized by the sutural knobs and secondary sculpture of fine wrinkles above, and by the crenulated or beaded line around the outer edge of the base.
