英和和英

形容詞

libristomate (not comparable)

1. (zoology) Of a trilobite, of the subclass Libristoma, and having a detached hypostome.
   • 2009, George P. Hansen, Trilobites of Black Cat Mountain, page 144:

     Thus, Fortey later began grouping natant trilobites and their offspring as libristomate to designate the non-attached, or formerly detached, nature of their hypostomes.