Mongolepidida is an order of primitive chondrichthyans (cartilaginous fishes) that lived during the Ordovician and Silurian periods of Asia and North America. They are only known from scales, so their appearance is largely unknown. The oldest of these scales, belonging to Solinalepis levis, have been dated back to the Sandbian age of the Ordovician, making mongolepidids some of the oldest chondrichthyans known to date.
Taxonomy Based on Andreev et al. (2016) and Andreev et al. (2020):
Family Mongolepididae Karatajūtė-Talimaa et al., 1990 Mongolepis Karatajūtė-Talimaa et al., 1990 Rongolepis Sansom et al., 2000 Sodolepis Karatajūtė-Talimaa & Novitskaya, 1997 Taklamakanolepis Andreev et al., 2020 Teslepis Karatajūtė-Talimaa & Novitskaya, 1992 Family Shiqianolepidae Sansom et al., 2000 Chenolepis Sansom et al., 2000 Shiqianolepis Sansom et al., 2000 Tielikewatielepis Andreev et al., 2020 Xiaohaizilepis Andreev et al., 2020 Xinjiangichthys Wang et al., 1998 Family incertae sedis Solinalepis Andreev et al., 2016
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