Reptilia.docx - Reptilia Reptiles(~300 Breath through lungs Scaly skin Ectothermic Thermoregulation Reproduction Ovoviviparous laying an egg inside of

Reptilia.docx - Reptilia Reptiles(~300 Breath through lungs...

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° Reptilia: Reptiles (~300) Breath through lungs Scaly skin Ectothermic Thermoregulation ° Reproduction Ovoviviparous : laying an egg inside of body and then hatches and then born. o No nourishment or direct energetic connection between offspring and parent Oviparous : some energetic connection/nourishment that occurs before o producing young by means of eggs that are hatched after they have been laid by the parent viviparous (viviparity evolved ~100x) sexual and asexual o Ex: gecko reproduced asexually ° ° Reptiles Testudine: turtles (~330) o 7 sp of sea turtles o 69% are threaten o Slow growth, late maturity, long-lived o All turtles lay eggs ( oviparous )
o Only tetrapod with shell that encloses both pectoral and pelvic girdle o Internal fertilization o Reduced bony elements in some spp Leatherback Soft shell o Evolution Oldest turtle ~240 mil Great predatorial defense but a lot of cost T shape cross section ribs Suit of armor Later turtles developed fused ribs Dermal bones Upper shell (carapace) Lower shell (plastron) Theory of shell: sequential increase in cross sections of ribs o 2 types of turtles pleurodira side neck cryptodira (majority) hidden neck o CA turtles
Cheloniidae (4) Sea turtles Lungs used for respiration and buoyancy Tear glands shed excess Na and K salts Osmotic homeostasis (costly) All sea turtles in US listed as endangered species Emydidae (2 ) Invasive pond turtles Pets that were let go and became this invasive species o Red eared slider omnivores chill at the bottom of pools or mud Testudinidae (1) Tortoise Long-lived / the oldest terrestrial Spend most of life in burrows

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