31 terms

Week 13_ Archosauria

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Terms in this set (...)

Oscines
Birdsong -> class of passeriformes that sing songs
Suboscines
non birdsong -> Class of passeriformes that don't sing
Syrinx
Sound box located below the trachea
Plantar Tendons
rear of the leg tighten when leg bands causing the foot to curl around the branch
Air sac
Found anterior and posterior to the lungs, act like bellows holding air and forcing it through the lungs
Pygostyle
fused vertebrae at the end of the tail that supports the tail feathers
Synsacrum
formed by fission of 10-23 vertebrae and expansion of ilium and ischium
Coracoid bone
form to brace the shoulder pressures exerted by wing muscle
Pterylae
follicles in the skin arranged in tracts, are called pterylae
Apteria
Patches of unfeatherd skin
Calamus
Short tubular base of feather
rachis
extends from calamus up the middle like a vein
Barbs
Closely spaced side branches from the rachis in feathers
Barbules
little hooks along the barb
Vane
the middle part of the feather
Pneumatic Bones
a lot of air space, super light "hollow bones"
Furcula
fused clavicle "wishbone"
Tarsometatarsus
fusion of distal tarsals to metatarsals
Tibiotarsus
(drumstick) fusion of proximal tarsal bones to end of the tibia
Bernouille's Principle
if velocity of a fluid increases, pressure exerted by the fluid decreases
Angle of attack
angle of wing that increases pressure differential
alula
slot in the leading edge of the wing that helps maintain smooth air flow at high angles and low speeds
melanin
pigment, black grey dark brown and redish brown
Carotenoids
pigment, red orange yellow
porphyrins
pigment, red fluorescence, pink brown and green
Schemochromes
submicroscopic structures in feathers fine enough to reflect light
Iridescence
made by constructive and destructive interference
Songtype
highly stereotyped song with a series of notes with intervals of silence between them
Social Monogamy
single male and female on the nest raise a clutch but extra pair copulations are common
Genetic monogamy
real monogamy
EPC (extra-pair copulations)
when you copulate with someone who isn't your mate/pair