See text Asterolepis is an extinct genus of antiarch placoderms from the Devonian of North and South America and Europe.

[1] They were heavily armored flat-headed benthic detritivores with distinctive jointed limb-like pectoral fins[2] and hollow spine.

Later very fine specimens were found in the Old Red Sandstone of Russia and Professor Asmus of Dorpat sent them to the British Museum, noticing fossils exhibited star-like markings.

[7] The pineal plate is small, trapezoidal, thin bone that covers the most posterior part of the orbito-nasal cavity.

The nasal sacs are bound between the rostral plate and the rhinocapsular section of the cartilaginous endocranium and are placed some distance from the telencephalon and opened antero-dorsally.

[5] The structure of the orbito-nasal cavity in the Asterolepis ornata has been studied, providing a detailed description of the premedian, rostral, and pineal plates, and bones of the sclerotic ring.

[7] The orbito-nasal fenestra is positioned in the middle of the head shield, leaning more towards the anterior end and is usually spectacle-shaped.

[7] At the Lode Quarry, Latvia, two specimens of Asterolepis ornata were found to have a fossa deep in the orbital fenestra that is treated to be the hypophysial foramen.

[3][9] Since the tail doesn't have a high degree of mineralization in comparison to the scales of the internal skeleton making then less likely to be preserved in the fossil record.

The medioventral bone, located at the center of the ventral wall of the armor, is absent form the trunk shield at early developmental stages of the Asterolepis ornata.

[5] In juvenile Asterolepis found at the Lode Quarry, Latvia, the caudal region was covered with very small, rounded scales.

The central row of the distal segment in the pectoral fins of juvenile Asterlepis ornata are fused together unlike their adult counterparts.

[5] Asterolepis chadwiki remains were found in the lower part of the Upper Devonian continental Kataberg Formation in Sullivan County, New York.

They were found in beds of sandstone, and clay strata with no other faunal remains, underlying Middle Jurassic formations.