WFC134L: Serpentes

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Herpetology

WFC134L

Serpentes

Snakes

Last updated 3:57 AM on 3/25/26

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53 Terms

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Which family are fangless?

Boidae, Pythonidae

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Which family are rear fanged?

Colubridae

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Which family are fixed fanged?

Elapidae

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Which family have folding fangs?

Viperidae

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Infraorder + Family?

Scolecophidia, Leptotyphlopidae
Threadsnakes
- cycloid scales
- short/blunt tail
- Tiny eyes
- 100+ species

<p>Scolecophidia, Leptotyphlopidae<br>Threadsnakes<br>- cycloid scales<br>- short/blunt tail<br>- Tiny eyes<br>- 100+ species</p>

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Infraorder + Family? (Hint: in the tropics)

Alethinophidia, Tropidophiidae
Thunder snakes
-tropics
~ 50 species

<p>Alethinophidia, Tropidophiidae <br>Thunder snakes<br>-tropics<br>~ 50 species</p>

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Infraorder + Family?

Alethinophidia, Boidae
Boas
- NA/SA, Asia, Africa
- singular subcaudal
- vestigial spurs
~ 50 species

<p>Alethinophidia, Boidae<br>Boas<br>- NA/SA, Asia, Africa<br>- singular subcaudal<br>- vestigial spurs<br>~ 50 species</p>

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Infraorder + Family?

Alethinophidia, Pythonidae
Pythons
- Africa, Philippines, Australia, India
- Robust/Large
- heat sensing pits
- divided subcaudal
~ 50 species

<p>Alethinophidia, Pythonidae<br>Pythons<br>- Africa, Philippines, Australia, India<br>- Robust/Large<br>- heat sensing pits<br>- divided subcaudal<br>~ 50 species</p>

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Infraorder + Family?

Alethinophidia, Cylindrophiidae
Burrowing Snakes
- Checkered white black bellies
~ 10 species

<p>Alethinophidia, Cylindrophiidae<br>Burrowing Snakes<br>- Checkered white black bellies<br>~ 10 species</p>

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Infraorder + Family?

Alethinophidia, Uropeltidae
Shield-tailed snake
- modified tail (shield)
~50 species

<p>Alethinophidia, Uropeltidae<br>Shield-tailed snake<br>- modified tail (shield)<br>~50 species </p>

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Infraorder + Family?

Alethinophidia, Xenopeltidae
Sunbeam
- HIGHLY IRIDESCENT
- pointed snout
~ >10 species

<p>Alethinophidia, Xenopeltidae<br>Sunbeam<br>- HIGHLY IRIDESCENT<br>- pointed snout<br>~ >10 species</p>

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Infraorder + Family?

Alethinophidia, Acrochordidae
Wart snakes
- Baggy skin
- pebbly/keeled scales
- tiny eyes
~ >10 species

<p>Alethinophidia, Acrochordidae<br>Wart snakes<br>- Baggy skin<br>- pebbly/keeled scales<br>- tiny eyes<br>~ >10 species</p>

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Infraorder + Super Family + Family + Sub Family?

Alethinophidia, Colubroidea, Viperidae, Viperinae
True Vipers
- Stout body
- no heat pits/rattles
~100 species

<p>Alethinophidia, Colubroidea, Viperidae, Viperinae<br>True Vipers<br>- Stout body<br>- no heat pits/rattles<br>~100 species</p>

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Infraorder + Super Family + Family + Sub Family?

Alethinophidia, Colubroidea, Viperidae, Crotalinae
Pit Vipers
- pit organ
~200 species

<p>Alethinophidia, Colubroidea, Viperidae, Crotalinae<br>Pit Vipers<br>- pit organ<br>~200 species</p>

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Infraorder + Super Family + Family?

Alethinophidia, Colubroidea, Homalopsidae
- tentacles (specimen we have)
~30 species

<p>Alethinophidia, Colubroidea, Homalopsidae<br>- tentacles (specimen we have)<br>~30 species</p>

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Infraorder + Super Family + Family?

Alethinophidia, Colubroidea, Elapidae
- Fixed fang
- colorful
- loreal absent
~400 species

<p>Alethinophidia, Colubroidea, Elapidae<br>- Fixed fang<br>- colorful<br>- loreal absent<br>~400 species</p>

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Infraorder + Super Family + Family?

Alethinophidia, Colubroidea, Colubridae
- Rear fang
+2k species

<p>Alethinophidia, Colubroidea, Colubridae<br>- Rear fang<br>+2k species</p>

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What are these scales?

A: Post-ocular
B: Pre-ocular
C: loreal
D: Infralabial
E: Supralabial
F: Post-nasal

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What order?

Amphisbaenia
Worm lizards
- ring like scales
~200 species

<p>Amphisbaenia<br>Worm lizards<br>- ring like scales<br>~200 species</p>

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<p>Infraorder + Family + Scientific name?<br>- tiny eyes<br>- spiney tail tip</p>

Infraorder + Family + Scientific name?
- tiny eyes
- spiney tail tip

Scolecophidia, Leptotyphlopidae
Rena humilis
Western Blind Snake

<p>Scolecophidia, Leptotyphlopidae<br>Rena humilis<br>Western Blind Snake</p>

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<p>Infraorder + Family + Scientific name?<br>- Little to no patterning<br>- vestigial leg spurs<br></p>

Infraorder + Family + Scientific name?
- Little to no patterning
- vestigial leg spurs

Alethinophidia, Boidae
Charina bottae
Northern rubber boa

<p>Alethinophidia, Boidae<br>Charina bottae<br>Northern rubber boa</p>

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<p>Infraorder + Superfamily + Family + Subfamily + Scientific name?<br>- light eye stripe<br>- heat sensing pit<br>- Dark blotch with dark border</p>

Infraorder + Superfamily + Family + Subfamily + Scientific name?
- light eye stripe
- heat sensing pit
- Dark blotch with dark border

Alethinophidia, Colubroidea, Viperidae, Crotalinae
Crotalus oreganus
Western Rattlesnake

<p><br>Alethinophidia, Colubroidea, Viperidae, Crotalinae<br>Crotalus oreganus<br>Western Rattlesnake</p>

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<p>Infraorder + Family + Scientific name?<br>3 longitudinal stripe </p>

Infraorder + Family + Scientific name?
3 longitudinal stripe

Alethinophidia, Boidae
Lichanura trivirgata
Rosy Boa

<p>Alethinophidia, Boidae<br>Lichanura trivirgata<br>Rosy Boa</p>

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<p>Infraorder + Superfamily + Family + Subfamily + Scientific name?<br>- Speckled<br>- dark stripes on tail<br>- more head scales</p>

Infraorder + Superfamily + Family + Subfamily + Scientific name?
- Speckled
- dark stripes on tail
- more head scales

Alethinophidia, Colubroidea, Viperidae, Crotalinae
Crotalus mitchellii
Speckled rattlesnake

<p>Alethinophidia, Colubroidea, Viperidae, Crotalinae<br>Crotalus mitchellii<br>Speckled rattlesnake</p>

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<p>Infraorder + Superfamily + Family + Subfamily + Scientific name?<br>- large eyelid scale<br>- eyestripe longer<br>- dark band thinner than white (tail)<br>- less head scales</p>

Infraorder + Superfamily + Family + Subfamily + Scientific name?
- large eyelid scale
- eyestripe longer
- dark band thinner than white (tail)
- less head scales

Alethinophidia, Colubroidea, Viperidae, Crotalinae
Crotalus scutulatus
Mojave rattlesnake

<p>Alethinophidia, Colubroidea, Viperidae, Crotalinae<br>Crotalus scutulatus <br>Mojave rattlesnake</p><p></p>

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<p>Infraorder + Superfamily + Family + Subfamily + Scientific name?<br>- horn-like above eyes (superocular)<br>- paler<br>- has pits</p>

Infraorder + Superfamily + Family + Subfamily + Scientific name?
- horn-like above eyes (superocular)
- paler
- has pits

Alethinophidia, Colubroidea, Viperidae, Crotalinae
Crotalus cerastes
Sidewinder

<p>Alethinophidia, Colubroidea, Viperidae, Crotalinae<br>Crotalus cerastes<br>Sidewinder</p>

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<p>Infraorder + Superfamily + Family + Subfamily + Scientific name?<br>- black/white stripe equal on tail<br>- white eye stripe touch mouth<br>- hexogonal blotches<br>- East Socal</p>

Infraorder + Superfamily + Family + Subfamily + Scientific name?
- black/white stripe equal on tail
- white eye stripe touch mouth
- hexogonal blotches
- East Socal

Alethinophidia, Colubroidea, Viperidae, Crotalinae
Crotalus atrox
Diamond-back rattlesnake

<p>Alethinophidia, Colubroidea, Viperidae, Crotalinae<br>Crotalus atrox<br>Diamond-back rattlesnake</p>

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Infraorder + Superfamily + Family + Subfamily + Scientific name?
- reddish

- divided infralabial

- light edge diamond

- white band doesnt touch mouth
- west socal

Alethinophidia, Colubroidea, Viperidae, Crotalinae
Crotalus ruber
Red diamond rattlesnake

<p>Alethinophidia, Colubroidea, Viperidae, Crotalinae<br>Crotalus ruber<br>Red diamond rattlesnake</p>

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<p> Infraorder + Superfamily + Family + Scientific name?<br>- 8 upper/9 lower labial<br>- 7>6 on upper<br>- pointier<br>- dorsal + lateral stripes</p>

Infraorder + Superfamily + Family + Scientific name?
- 8 upper/9 lower labial
- 7>6 on upper
- pointier
- dorsal + lateral stripes

Alethinophidia, Colubroidea, Colubridae
Thamnophis atratus
Aquatic garter snake

<p>Alethinophidia, Colubroidea, Colubridae<br>Thamnophis atratus<br>Aquatic garter snake</p>

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<p> Infraorder + Superfamily + Family + Scientific name?<br>- checkered<br>- 6>7 upper labial<br>- no dorsal stripe<br></p>

Infraorder + Superfamily + Family + Scientific name?
- checkered
- 6>7 upper labial
- no dorsal stripe

Alethinophidia, Colubroidea, Colubridae
Thamnophis couchii
Sierra garter snake

<p>Alethinophidia, Colubroidea, Colubridae<br>Thamnophis couchii<br>Sierra garter snake</p>

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<p> Infraorder + Superfamily + Family + Scientific name?<br>- equal chin shields<br>- 8 upper/10 lower labial<br>- not pointed internasal<br>- no pointed nose</p>

Infraorder + Superfamily + Family + Scientific name?
- equal chin shields
- 8 upper/10 lower labial
- not pointed internasal
- no pointed nose

Alethinophidia, Colubroidea, Colubridae
Thamnophis elegans
Western terrestrial garter snake

<p>Alethinophidia, Colubroidea, Colubridae<br>Thamnophis elegans<br>Western terrestrial garter snake</p>

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<p>Infraorder + Superfamily + Family + Scientific name?<br>- 7 upper/10 lower labial<br>- chin shields longer</p>

Infraorder + Superfamily + Family + Scientific name?
- 7 upper/10 lower labial
- chin shields longer

Alethinophidia, Colubroidea, Colubridae
Thamnophis sirtalis
Common garter snake

<p>Alethinophidia, Colubroidea, Colubridae<br>Thamnophis sirtalis<br>Common garter snake</p>

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<p>Infraorder + Superfamily + Family + Scientific name?<br>- jumbled striping<br>- wider nose</p>

Infraorder + Superfamily + Family + Scientific name?
- jumbled striping
- wider nose

Alethinophidia, Colubroidea, Colubridae
Nerodia sipedon
Northern Watersnake

<p>Alethinophidia, Colubroidea, Colubridae<br>Nerodia sipedon<br>Northern Watersnake</p>

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<p>Infraorder + Superfamily + Family + Scientific name?<br>- narrow nose<br>- consistent banding<br>- dark eye stripe</p>

Infraorder + Superfamily + Family + Scientific name?
- narrow nose
- consistent banding
- dark eye stripe

Alethinophidia, Colubroidea, Colubridae
Nerodia fasciata
Banded water snake

<p>Alethinophidia, Colubroidea, Colubridae<br>Nerodia fasciata<br>Banded water snake</p>

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<p>Infraorder + Superfamily + Family + Scientific name?<br>- green and yellow belly<br>- Larger eyes</p>

Infraorder + Superfamily + Family + Scientific name?
- green and yellow belly
- Larger eyes

Alethinophidia, Colubroidea, Colubridae
Coluber constricter
Eastern racer

<p>Alethinophidia, Colubroidea, Colubridae<br>Coluber constricter<br>Eastern racer</p>

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<p>Infraorder + Superfamily + Family + Scientific name?<br>- 2 lateral stripes<br>- no dorsal stripe</p>

Infraorder + Superfamily + Family + Scientific name?
- 2 lateral stripes
- no dorsal stripe

Alethinophidia, Colubroidea, Colubridae
Coluber lateralis
Striped racer

<p>Alethinophidia, Colubroidea, Colubridae<br>Coluber lateralis<br>Striped racer</p>

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<p>Infraorder + Superfamily + Family + Scientific name?<br>- reddish with black crossbar on neck<br>- no stripe<br>- long tail</p>

Infraorder + Superfamily + Family + Scientific name?
- reddish with black crossbar on neck
- no stripe
- long tail

Alethinophidia, Colubroidea, Colubridae
Coluber flagellum
Coachwhip

<p>Alethinophidia, Colubroidea, Colubridae<br>Coluber flagellum<br>Coachwhip</p>

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<p>Infraorder + Superfamily + Family + Scientific name?<br>- many striped<br>- no dorsal</p>

Infraorder + Superfamily + Family + Scientific name?
- many striped
- no dorsal

Alethinophidia, Colubroidea, Colubridae
Coluber taeniatus
Striped whipsnake

<p>Alethinophidia, Colubroidea, Colubridae<br>Coluber taeniatus<br>Striped whipsnake</p>

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<p>Infraorder + Superfamily + Family + Scientific name?<br>- black/white bands<br>- white larger toward stomach</p>

Infraorder + Superfamily + Family + Scientific name?
- black/white bands
- white larger toward stomach

Alethinophidia, Colubroidea, Colubridae
Lampropeltis californiae
CA kingsnake

<p>Alethinophidia, Colubroidea, Colubridae<br>Lampropeltis californiae<br>CA kingsnake</p>

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<p>Infraorder + Superfamily + Family + Scientific name?<br>- red in middle of black</p>

Infraorder + Superfamily + Family + Scientific name?
- red in middle of black

Alethinophidia, Colubroidea, Colubridae
Lampropeltis zonata
Mountain kingsnake

<p>Alethinophidia, Colubroidea, Colubridae<br>Lampropeltis zonata<br>Mountain kingsnake</p>

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<p>Infraorder + Superfamily + Family + Scientific name?<br>- No pattern on stomach<br>- pointier head<br>- smooth scales</p>

Infraorder + Superfamily + Family + Scientific name?
- No pattern on stomach
- pointier head
- smooth scales

Alethinophidia, Colubroidea, Colubridae
Arizona elegans
Glossy snake

<p>Alethinophidia, Colubroidea, Colubridae<br>Arizona elegans<br>Glossy snake</p>

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<p></p><p>Infraorder + Superfamily + Family + Scientific name?<br>- rounder head<br>- keeled scales</p>

Infraorder + Superfamily + Family + Scientific name?
- rounder head
- keeled scales

Alethinophidia, Colubroidea, Colubridae
Pituophis catenifer
Gopher snake

<p>Alethinophidia, Colubroidea, Colubridae<br>Pituophis catenifer<br>Gopher snake</p>

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<p>Infraorder + Superfamily + Family + Scientific name?<br>- saddle bands<br>- overbite</p>

Infraorder + Superfamily + Family + Scientific name?
- saddle bands
- overbite

Alethinophidia, Colubroidea, Colubridae
Chionactis occipitalis
Shovel-nosed snake

<p>Alethinophidia, Colubroidea, Colubridae<br>Chionactis occipitalis<br>Shovel-nosed snake</p>

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<p>Infraorder + Superfamily + Family + Scientific name?<br>- speckled black saddles<br>- checkered<br></p>

Infraorder + Superfamily + Family + Scientific name?
- speckled black saddles
- checkered

Alethinophidia, Colubroidea, Colubridae
Rhinocheilus lecontei
Long-nosed snake

<p>Alethinophidia, Colubroidea, Colubridae<br>Rhinocheilus lecontei<br>Long-nosed snake</p>

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<p>Infraorder + Superfamily + Family + Scientific name?<br>- larger + striped<br>- heart nose<br>- anal scale split</p>

Infraorder + Superfamily + Family + Scientific name?
- larger + striped
- heart nose
- anal scale split

Alethinophidia, Colubroidea, Colubridae
Salvadora hexalepis
Patch-nosed snake

<p>Alethinophidia, Colubroidea, Colubridae<br>Salvadora hexalepis<br>Patch-nosed snake</p>

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<p>Infraorder + Superfamily + Family + Scientific name?<br>- triangle nose<br>- spotted<br>- anal scale whole</p>

Infraorder + Superfamily + Family + Scientific name?
- triangle nose
- spotted
- anal scale whole

Alethinophidia, Colubroidea, Colubridae
Phyllorhynchus decurtatus
Leaf-nosed snake

<p>Alethinophidia, Colubroidea, Colubridae<br>Phyllorhynchus decurtatus<br>Leaf-nosed snake</p>

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<p>Infraorder + Superfamily + Family + Scientific name?<br>- ring on neck<br>- spotted belly</p>

Infraorder + Superfamily + Family + Scientific name?
- ring on neck
- spotted belly

Alethinophidia, Colubroidea, Colubridae
Diadophis punctatus
Ring-necked snake

<p>Alethinophidia, Colubroidea, Colubridae<br>Diadophis punctatus<br>Ring-necked snake</p>

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<p>Infraorder + Superfamily + Family + Scientific name?<br>- black head<br>- no spots on belly</p>

Infraorder + Superfamily + Family + Scientific name?
- black head
- no spots on belly

Alethinophidia, Colubroidea, Colubridae
Tantilla planiceps
Western black-headed snake

<p>Alethinophidia, Colubroidea, Colubridae<br>Tantilla planiceps<br>Western black-headed snake</p>

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<p>Infraorder + Superfamily + Family + Scientific name?<br>- black white bars on ventral<br>- sharp spine</p>

Infraorder + Superfamily + Family + Scientific name?
- black white bars on ventral
- sharp spine

Alethinophidia, Colubroidea, Colubridae
Contia tenuis
Sharp-tailed snake

<p>Alethinophidia, Colubroidea, Colubridae<br>Contia tenuis<br>Sharp-tailed snake</p>

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<p>Infraorder + Superfamily + Family + Scientific name?<br>- dark blotched neck<br>- brown/blotchy<br>- horizontal eye stripe<br>- cat eyes</p>

Infraorder + Superfamily + Family + Scientific name?
- dark blotched neck
- brown/blotchy
- horizontal eye stripe
- cat eyes

Alethinophidia, Colubroidea, Colubridae
Hypsiglena ochrorhyncha
Night snake

<p>Alethinophidia, Colubroidea, Colubridae<br>Hypsiglena ochrorhyncha<br>Night snake</p>

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<p>Infraorder + Superfamily + Family + Scientific name?<br>- V pattern head<br>- cat eyes<br>- dark neck</p>

Infraorder + Superfamily + Family + Scientific name?
- V pattern head
- cat eyes
- dark neck

Alethinophidia, Colubroidea, Colubridae
Trimorphodon biscutatus
Lyresnake

<p>Alethinophidia, Colubroidea, Colubridae<br>Trimorphodon biscutatus<br>Lyresnake</p>

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<p>Infraorder + Superfamily + Family + Scientific name?<br>- finny tail<br>- no loreal scale</p>

Infraorder + Superfamily + Family + Scientific name?
- finny tail
- no loreal scale

Alethinophidia, Colubroidea, Elapidae
Hydrophis platurus
Yellow bellied sea snake

<p>Alethinophidia, Colubroidea, Elapidae<br>Hydrophis platurus<br>Yellow bellied sea snake</p>

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Serpentes characteristics

short tail
limbless
left lung absent/greatly reduced
no external ears
no moveable eyelids

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