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Family Ambystomatidae

Family Ambystomatidae. Mole Salamanders - well defined costal folds and grooves -amphicelous vertebrae -1 genus and approx. 30+ species - well-developed lungs -no nasolabial groove -pelvic girdle has cartilaginous structure which may aid in respiratory movement = ypsiloid cartilage

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Family Ambystomatidae

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  1. Family Ambystomatidae Mole Salamanders -well defined costal folds and grooves -amphicelous vertebrae -1 genus and approx. 30+ species - well-developed lungs -no nasolabial groove -pelvic girdle has cartilaginous structure which may aid in respiratory movement = ypsiloid cartilage -paedomorphic axolotl (Ambystoma mexicanum) - in Arkansas: -Ambystoma annulatum - ringed salamander -endemic to interior highlands -breeds in fall, lays attached clusters of eggs -A. opacum - marbled -E. to Central USA -fall breeder, lays terrestrial eggs, guards them until fall rain causes inundation -A. maculatum - spotted -breeds around mid-January -lays strong egg clusters

  2. Family Ambystomatidae (cont.) -A. texanum-smallmouth -breeds in mid Jan. -several 20 egg clusters in fragile arrangements -A. talpoideum-mole -SE USA -breeds from Dec. to Feb. -terrestrial metamorphs lay eggs like A. annulatum -aquatic paedomorphs lay small loose eggs in murky water -A. tigrinum-tiger -all over USA -breed in mid Jan. to March -most lay eggs in ponds or ditches -courtship is intricate 1) Approach, 2) Nudge, 3) Waltz, 4) Female follows, 5) Cloacal bump and spermatophore drop, 6) Female sees sperm, 7) Picks up sperm- sperm goes into spermatheca with several ducts opening into cloacal cavity -large clusters of males deposit spermatophores simultaneously

  3. Ambystoma annulatum

  4. Ambystoma opacum

  5. Ambystoma maculatum

  6. Ambystoma texanum

  7. Ambystoma talpoideum

  8. Ambystoma tigrinum

  9. Ambystoma Larvae – tigrinum, talpoideum

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