La descripcion de la ontogenia de las membranas extraembrionarias en escamados oviparos se ha realizado en Lacerta agilis (Hrabowski 1926), Elgaria multicarinata (Stewart 1985), Bassiana duperreyi (Stewart & Thompson 1996), Eumeces fasciatus (Stewart & Florian, 2000), Lacerta vivipara (Stewart & Thompson 2004) y una culebra ovipara, Elaphe guttata
(Blackburn et al.
dead, partially decomposed 171 2 Black Racer, Coluber constrictor dead, recently 5001 3 unknown dead, complete skeletons 5011 0 5016* 0 5071 2 Black Racer, Coluber constrictor alive, severe lacerations 1 Corn Snake, Elaphe guttata
alive, severe lacerations 5092 0 5128 0 5135 0 5184 2 unknown dead, complete skeletons 5190 1 Black Racer, Coluber constrictor dead, partially decomposed 1 Eastern Hognose alive, severe lacerations (fatal) 5204 1 Black Racer, Coluber constrictor alive, released 5239 1 Black Racer, Coluber constrictor dead, partially decomposed 1 unknown dead, complete skeleton ([section]) Bay 5016 was flooded and could not be plugged until later that year, so no ECB was installed.
Three hundred thirty-seven preserved specimens of the corn snake Elaphe guttata from Texas, six from Arkansas, 51 from Louisiana and 20 from Missouri were examined and assigned to one of three subspecies.
An examination of Texas specimens of Elaphe guttata for number of dorsal body and tail blotches, number of ventrals and subcaudals, and degree of ventral pigmentation suggests several taxonomic scenarios.