Petitclercia
Encyclopedia
Petitclercia is a genus of mollusk from the strigoceratid
subfamily Disticocratinae which are included in the ammonitid
superfamily Haplocerataceae
. Petitclercia, named by Rollier, 1909, is found in the upper Middled Jurassic (Callovian) of France.
The shell of Petitclercia is involute, very compressed, with a sharp umbilical angle and sharp fastigate venter. Spath (1928)speculated that Petitclercia is perhaps "an involute development of Chanasia", another of the Distichoceratinae.
Strigoceratidae
The Strigoceratidae is a family in the ammonitid superfamily Haplocerataceae, restricted to the lower Middle Jurassic, Bajocian stage, possibly derived from the Hammitoceratidae...
subfamily Disticocratinae which are included in the ammonitid
Ammonitida
The Ammonitida is an order of more highly evolved ammonoid cephalopods from the Jurassic and Cretaceous time periods, commonly with intricate ammonitic sutures....
superfamily Haplocerataceae
Haplocerataceae
Haplocerataceae is a superfamily of ammonoid cephalopods belonging to the Ammonitida that unites three families, the Strigoceratidae, Oppeliidae, and Haploceratidae, listed below....
. Petitclercia, named by Rollier, 1909, is found in the upper Middled Jurassic (Callovian) of France.
The shell of Petitclercia is involute, very compressed, with a sharp umbilical angle and sharp fastigate venter. Spath (1928)speculated that Petitclercia is perhaps "an involute development of Chanasia", another of the Distichoceratinae.