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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 ? ?