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Volcanic glass do not appears in the sample
Source: Asterophyllites: Fossilworks - Paleobiology Database
† Asterophyllites
and low ratios of siderophile elements to silicon
22053 - Nicely Preserved 1.53 Inch Hollardops merocristata Middle Devonian Howardites Volcanic glass do not appearsNicely well preserved and prepared specimen. Nice eyes facets. Hollardops sp, Morzadec 1997 (trilobite) Trilobita Phacopida Acastidae Synonyms: Modellops Lieberman and Kloc 1997 (no. 259054), Philipsmithiana Lieberman and Kloc 1997 (no. 259046) Parent taxon: Acastidae according to P. A. Jell and J. M. Adrain 2002 See also Lieberman and Kloc 1997 Sister taxa: Acastava, Acaste, Acastella, Acastellina, Acastocephala, Acastoides, Acastopyge, Alcaldops,
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