Asaphus lepidurus trilobite 61mm from St. Petersburg, Wolchow River, Russia. and date back to the Palaeozoic era, 490 to 470 million years. An extremely interesting Asaphus arthropod showing very well the characteristics of this genus type. The glabella and pygidium are of similar size thus making this Asaphus lepidurus trilobite isopygous. The thorax is noted at having eight thoracic segments with diagonal pleural furrows. The genus like other trilobites has a multi-lensed compound eye, holochroal eyes. in the genus, Asaphus lepidurus trilobites eyes are quite stubby, not elongated on stalks as seen in some other types of Asaphus.
The fossilised arthropod has been prepared in such a way as to seem the arthropod is climbing downward, the carapace has been cleaned showing every detail. the pygidium has become detached in the fossil process and happily the preparator has not tried to lift it and reseat it to make a perfect looking specimen and in fact has instead left the pygidium shield detached so we can study this very interesting event. The limestone bedrock which held the arthropod active for so long now cut flat for an attractive display accent. Altogether a fine specimen from this classic trilobite fossil bed.