Flashcards: 344 1-3

Synapomorphy

Derived trait (Ancestor doesn't have it) shared by 2+ taxa

Homologous

Trait shared by 2+ taxa, share common ancestor

Analogous

Trait shared by 2+ taxa through convergent evolution

Homoplasy

Trait shared by 2+ taxa, don't share ocmmon ancestor

Plesiomorphy

Inhrited (shared) with ancestor

Systematics

Is about context

Sagittal plane

Seperate side from side

Transverse plane

Seperate top from bottom

Superior/ Inferior

Above/ Below

Anterior/ Posterior

Front/ Back

Cranial/ Caudal

Head/Tail

Dorsal/ Ventral

Back/ Stomach

Coronal Plane

Seperate front and back

Chordate Diagnostic Characteristics (5 Synapomorphies)

Notochord

Myomeres

Postanal tail

Dorsal Hollow Nerve Cord

Endostyle

Notochord

Muscle attatches here

Myomeres

V or W shaped muscle

Postanal tail

Tail

Dorsal Hollow Nerve Cord

Dorsal to notochord

Endostyle

Mucus maker

Chordate

Vertebrates, Lancelet, Sea squirt

Chepha;pchordata

Urochordata

Vertebrata

<p>Brachial Siphon</p>

Brachial Siphon

<p>Pharyngeal/ Brachial basket (+ Gill slits)</p>

Pharyngeal/ Brachial basket (+ Gill slits)

<p>Endostyle</p>

Endostyle

<p>Heart</p>

Heart

<p>Stomach</p>

Stomach

<p>Anus</p>

Anus

<p>Intestine</p>

Intestine

<p>Atrium</p>

Atrium

<p>Atrail Siphon</p>

Atrail Siphon

<p>Dorsal Ganglion</p>

Dorsal Ganglion

<p>Atrium</p><p>Tunic</p>

Atrium

Tunic

<p>Tad Pole anatomy</p><p>Adhesive Papillae</p><p>Pharynx</p><p>Head</p><p>Eye spot (Cerebral Vescicle)</p><p>Tinuc</p><p>Notochord</p><p>Tail</p>

Tad Pole anatomy

Adhesive Papillae

Pharynx

Head

Eye spot (Cerebral Vescicle)

Tinuc

Notochord

Tail