Legless lizards 0.0 / 5 ? zoologysquamata UniversityNone Created by: phoeberbCreated on: 18-05-19 14:01 Benefits of fossorial lifestyle in legless squamates food availability and storage, visually no predators, escape wildfires 1 of 24 features of the cephalic scales fused scales, form rostral shield for friction and shock absorption. 2 of 24 3 Types of snout for digging Blunt, shovel, wedge 3 of 24 how do blunt snouts dig? ram impact, rotate head to shave foil 4 of 24 how do shovel snouts dig? ram end of tunnel, lift head to compact soil 5 of 24 how do wedge snouts dig? ram end of tunnel, use snout or side neck to compress soil 6 of 24 2 types of snake locomotion lateral undulation and concertina 7 of 24 lateral undulation body curved and presses back on objects, scales provide friction 8 of 24 concertina body forms loops, and presses against its own body loops to extend forward 9 of 24 burrowing snake features blind, short, blunt heads and tiny eyes 10 of 24 constrictor snake features shorter, slower, stout, slow crawlers, poke heads into preys nests 11 of 24 non-constrictors snake features longer, faster, look for prey 12 of 24 arboreal snake features very long, large eyes, follow prey 13 of 24 sea snake features laterally flattened tail, short head 14 of 24 viper snake features large head, stout body, sudden and forceful bites 15 of 24 what are the 4 fang types? Aglyphous, Opsthoglyphous, proteroglyphous, solenglyphous 16 of 24 features of aglyphous fangs no fangs or venom, grasp prey and use constriction, seen in pythons 17 of 24 features of opsthoglyphous fangs venomous fangs at rear, move prey to the back to inject, seen in boomslangs 18 of 24 features of proteroglyphous fangs permanently erect venom fangs, short and hollow, seen in king cobras 19 of 24 features of solenglyphous fangs fangs pressed against roof of mouth, pterygoid erects fangs, unique to vipers, seen in rattlesnakes 20 of 24 how is venom delivered? CG muscle pressures venom gland, venom ducts then release venom to the fang, prey compresses the fang sheath to deliver venom 21 of 24 what is macrostomy? high cross sectional area prey ingested whole 22 of 24 how do Macrostomata snakes ingest prey? increased gnathic complex opens mouth to accommodate prey, soft tissues enable stretching 23 of 24 how do Macrostomata snakes digest prey? oesophagus distensible, stomach uses digestive enzymes, hypertrophy of intestines, heart, liver, kidney, pancreas experience tissue mss increase 24 of 24
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