Słownik angielskiego
A single fossil is known, coming from the Messel Pit in southwestern Germany.
Pengornis is known from a single fossil, described by Zhou et al. in 2008.
A single fossil from the Baja California peninsula indicates the family once inhabited warmer waters.
A single fossil of hagfish shows that there has been little evolutionary change in the last 300 million years.
Two species were described, each from a single fossil find.
A single fossil (consisting of a single lower leg bone, or tibia) was found in Germany.
The single fossil is an incomplete semi-articulated skeleton the size of a sparrow.
The single known fossil is a partial upper leg bone, specifically the lower section of the right tibiotarsus.
It was described in 2010 on the basis of a single fossil from Oklahoma.
It is known from a single, hand-sized fossil from the middle Triassic period of Spain.