sirenids in a sentence
1. Fertilisation is likely to be external as sirenids lack the cloacal glands used by male salamandrids to produce spermatophores and the females lack spermathecae for sperm storage.
2. Though frequently feeding on slow-moving animals like snails, shrimps and worms, sirenids are unique among salamanders for having developed speciations towards herbivory, such as beak-like jaw ends and extensive intestines.
3. Amidst lissamphibians, there is evidence for sirenids (including the large Habrosaurus), the batrachosauroidid salamander Parrisia, hylids, possible representatives of Eopelobates and Discoglossus, showing close similarities to European faunas, but aside from Habrosaurus (which is also found on Laramidia) there is a high degree of endemism, suggesting no interchanges with other landmasses throughout the Late Cretaceous.