"Saffordoceras ", named by Foeste and Teichert in 1930, is an actinicerid with a ventrally flattened shell, subventral siphuncle with short segments, and sutures with broad shallow ventral lobes and narrower lateral saddles . " Saffordoceras " comes from the Middle Ordovician of eastern North America.
22.
The "'Ammonellipsitinae "'is a subfamily ( one of two ) within the Pericyclidae, a family within the Mississippian ) characterized by having a suture in which the sides of the ventral lobe diverge and the first lateral saddle is acute or subacute, and in which the immature and juvenile shell has a wide umbilucus.
23.
Genus " "'Saffordoceras " "'is an actinoceratid from the Middle Ordovician, found in eastern North America, characterized by a flattened venter; sutures with broad, deep ventral lobes and narrow lateral saddles; and subventral siphuncle with segments decreasing from about 0.3 to less than 0.2 the shell diameter . " Saffordoceras " is probably derived from " Actinoceras ".
24.
Discoclymenia has a subglobular to discoidal shell with a small, closed umbilicus, like " Sporadoceras " but with additional adventitious lobes in the 1st lateral saddles . " Discoclymenia " and " Sporadoceras " are included in the subfamily Sporadoceratinae of Miller and Furnish ( 1964 ) along with " Praeglyphioceras " according to Miller et at ( 1964 ) . " Discoclymenia " comes from the Upper Devonian of Europe and North Africa.
