chordata amniotes

amniotes

unlike amphobians (anamniotes), this develop an egg that could be laid on and skip the pond dwelling stages

amnion

The egg shell consists of extraembryonic membrane that provides support to the embryo, these membranes encloses a fluid filled cavity where the embryo floats

allantois

this serves as respiratory surface and as a chamber for nitrogenous wastes

chorion

encloses the amnion and allantois

shell

surrounds everything

Paleozoic era

era in which the amniotes diverged into 3 major lineages

Vertebrata

subphylum where reptillia aves and mammalia belong to

Class Aves

this is where lizards snakes crocodiles and turtles belong to. they are ectothermic; tetrapods possessing lings; no larval stage; skin dry; no mucus glands and body covered w scales

Class Aves

class of endothermic vertebrates with front limbs modified for flight, has feathers, scales on feet

Class mammalia

class of endothermic vertebrates possessing mammary glands, and body covered w hair

Gecko gecko (class reptilia)

only lizards w voice. nocturnal. body slightly depressed and the tail is subcylindrical

Hemidactylus frenatus (Common house gecko)

gecko that has bidivided lamella in proximal half of its fingers

Python reticulatus (reticulated python)

longest of its seven species of python since it can reach up to 32 ft. in length.

Naja naja (Philippine common cobra)

belongs to the family Elapidae (coral snakes and cobras) to which the most venomous snakes belong. Examine the preserved specimen. The snout is short and broadly round. The head is slightly distinct from the neck.

Chelonia mydas (Green turtle)

Chelonia

belongs to the order Testudinata, family

Chelonidae (True sea turtles). This family

is characterized with paddle-shaped legs

with 1 or 2 claws on each leg.

carapace

true shell of turtle

Cuora amboinensis (Malatan fresh- water turtle)

belongs to family Emydidae (Common fresh-water turtle). This family is characterized with oval, streamline shaped, no paddle-shaped legs with more than 2 claws on each foot.

Gallus gallus (Red Junglefow/Labuyo).

It is completely covered by an epidermal

derivative, the feathers. The contour

feathers cover and streamline the bird’s

body. The forelimb, covered with flight

feathers, is lightweight but powerful for air

travel.

Paser montanus (Eurasian Tree

Sparrow).

Locally known as the “maya”

Anas luzonica (Philippine Duck).

It is a

large and distinctive water bird with

palmate feet (webbing between toes) that

is used for swimming.

Acerodon jubatus (Golden-crowned

flying fox).

belonging to order

Chiroptera, includes species of mammals

that have their forelimbs developed to

become wings.endemic to the

Philippines and can be found in lowland

forests. They are widely distributed nut

population is declining due to habitat

destruction and excessive hunting.

Chiroptera

means “hand-winged ones”

bats

only mammals that could fly

Rattus everetti (Common Philippine

forest rat).

belong to order

Rodentia---the “gnawing” mammals. This

group has upper and lower pair of arc-

shaped, chisel-edged incisors that

continuously grow throughout their lifetime.

Anapsid

type of skull that has no temporal opening behind the orbits being completely roofed with dermal bone

diapsid

type of skull that has presence of two temporal openings: one pair located on the cheeks and a second pair positioned above the lower pair and separated from them by a bony arch.

Synapsid

type of skull that single pair of temporal openings located low on the cheeks and bordered by a bony arch.