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Date of Award
Restricted Thesis: Campus only access
Bachelor of Science
Dr. Rafael de Sa
The genus Ptychohyla consists of eleven species of neotropical mountain stream-breeding tree frogs. Herein we report and compare anatomical larval characteristics for three species: P. salvadorensis, P. spinipollex and P. hypomykter. Chondrocranial anatomy and skeletal development were analyzed using tadpoles that were cleared and double-stained for bone and cartilage. The chondrocrania are similar, all having medially fused suprarostrals, larval otic processes, and cornua trabeculae representing about one-fifth of total chondrocranial length. At stage 25 P. salvadorensis possesses a well developed larval processus antorbitalis, which is poorly developed in the other species. Sequences of cranial and postcranial ossification are reported based on a complete developmental series of P. salvadorensis (23 tadpoles and juveniles); for the other species only incomplete developmental series were available and thus comparisons are made where possible. Ossification begins significantly later in P. hypomykter than in the other two species.
Stevens, Todd M., "Chondrocranial morphology and ossification of three species of Ptychohyla (Ampibia:Anura:Hylidae)" (1997). Honors Theses. 525.