This is a classic trilobite specimen with Dalmanitina socialis from the locality "Drabow", i.e. Drabov. The locality of Drabov is also used synonymously with Ded Hill. However, that these finds with Dalmanitina socialis come exclusively from old collections.  Only heads and tails of Dalmanitina socialis are found up on the Ded Hill. It can therefore be assumed that these classic finds come from a different horizon within the Letná Formation. It is not unlikely that this piece comes from the locus and stratus typicus for Dalmanitina socialis.
The complete Dalmanitina socialis measures about 71 mm in length.

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