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Table 4 Character matrix for the presence or absence of elements (Fig. 13b). Character 1: fenestra basicranialis posterior: 0 = absent; 1 = present; 0/1 = contradicting information;? = no information. Character 2: intertrabecula: 0 = absent; 1 = present; 0/1 = contradicting information;? = no information. Character 3: fenestra of interorbital septum: 0 = absent; 1 = present;? = no information. Character 4: fenestra of nasal septum: 0 = absent; 1 = present;? = no information. Character 5: concha nasalis: 0 = absent; 1 = present;? = no information. Character 6: atrioturbinal: 0 = absent; 1 = present; 0/1 = contradicting information;? = no information. Character 7: additional tectal cartilage: 0 = absent; 1 = present;? = no information

From: Evolution and development of the bird chondrocranium

Characters

1

2

3

4

5

6

7

Species

Apteryx australis

1

0

?

?

1

1

0

Dromaius novaehollandiae

0

1

1

?

?

1

?

Rhea americana

0

?

1

?

1

1

?

Struthio sp.

0/1

0

0

0

1

1

0

Coturnix japonica

?

1

?

1

1

1

?

Meleagris gallopavo

?

?

1

?

?

?

?

Gallus gallus

1

0/1

1

1

1

1

0

Anas platyrhynchos

1

0

1

1

1

1

0

Caprimulgus pectoralis

0

?

0

1

1

1

?

Columba livia

1

1

?

?

?

?

0

Streptopelia senegalensis

1

1

1

1

1

1

0

Opisthocomus hoazin

?

1

1

?

1

0/1

?

Spheniscus demersus

0

0

1

1

1

1

0

Larus sp.

1

?

?

?

?

?

?

Phalacrocorax carbo

1

0

1

?

?

1

0

Falco tinnunculus

1

1

1

1

?

1

1

Melopsittacus undulatus

0

0

0

1

0

1

0

Euplectes orix

1

0/1

1

1

0

1

0

Passer sp.

1

1

1

?

0

1

1

Sturnus sp.

1

0

?

?

?

?

?

Hirundo rustica

?

?

?

?

0

?

?