chasmataspidid

English

Noun

chasmataspidid (plural chasmataspidids)

1. (zoology) Any of the Chasmataspidida, an extinct group of chelicerate arthropods.
   • 2015 September 1, James C. Lamsdell et al., “The oldest described eurypterid: a giant Middle Ordovician (Darriwilian) megalograptid from the Winneshiek Lagerstätte of Iowa”, in BMC Evolutionary Biology‎^[1], volume 15, →DOI:

     The sixth prosomal appendage is modified in both xiphosurids and chasmataspidids for use in locomotion or burrowing.