Proaethaspis

Proaethaspis is an extinct monospecific genus of arthrodire placoderm fish from the Early Devonian period.^[1] The type species Proaethaspis ohioensis was described in 1960, but was assigned to the genus Proaethaspis in 1978.

Proaethaspis Temporal range: Early Devonian: Pragian, 410–407 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	†Placodermi
Order:	†Arthrodira
Genus:	†Proaethaspis Denison, 1978
Species
†Proaethaspis ohioensis Denison, 1960 (type)

Classification

Proaethaspis is one of the more basal members of the order Arthrodira, closely related to Baringaspis, as shown in the cladogram below:^[2]

Eurycaraspis incilis Lunaspis broilii Arthrodira Yujiangolepis liujingensis Antarctaspis mcmurdoensis Wuttagoonaspidae Wuttagoonaspis fletcheri Yiminaspis shenme Aethaspis major Aethaspis utahensis Lehmanosteus hyperboreus Aleosteus eganensis Simblaspis cachensis Kujdanowiaspis buczacziensis Kujdanowiaspis podolica Erikaspis zychi Sigaspis lepidophora Eskimaspis heintzi Baringaspis dineleyi Proaethaspis ohioensis Anarthraspis chamberlini Heightingtonaspis anglica Phyllolepida Gavinaspis convergens Austrophyllolepis sp. Cowralepis mclachlani Phyllolepis orvini Placolepis budawangensis Actinolepidae Bollandaspis woschmidti Actinolepis spinosa Actinolepis magna Actinolepis tuberculata Bryantolepis brachycephalus Phlyctaenioidei Phlyctaeniidae Groenlandaspidae Arctaspidae Dicksonosteus arcticus Arctolepidae Brachythoraci

Actinolepidoidei Phlyctaeniina