AverostraAvetheropodaCoelurosauriaDinosauriaEusaurischiaLate JurassicManiraptoraManiraptoriformesNeotheropodaNorth AmericaOrionidesParavesPennaraptoraSaurischiaTetanuraeTheropodaTroodontidaeTyrannoraptora

Hesperornithoides miessleri

Dinosaur: Hesperornithoides miessleri

Type: Theropod

Length*:90 cm3.0 ft
Weight*:2.5 kg6 lb
ESR: 3.5 / 4 (estimated size reliability)
*The largest known specimen


Material: Large part of skeleton with skull.
References: Hartman, S., Mortimer, M., Wahl, W.R., Lomax, D.R., Lippincott, J., Lovelace, D.M. (2019). "A new paravian dinosaur from the Late Jurassic of North America supports a late acquisition of avian flight".


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