Heterobranchia: Mathildoidea, Valvatoide

Chapters: Mathildoidea, Valvatoidea, Nerineoidea, Streptacidoidea, Omalogyroidea, Rissoelloidea. Source: Wikipedia. Pages: 19. Not illustrated. Free updates online. Purchase includes a free trial membership in the publisher's book club where you can select from more than a million books without charge. Excerpt: See text Mathildoidea is a superfamily of sea snails, marine gastropod mollusks in the informal group Lower Heterobranchia. Families within the superfamily Mathildoidea include: ...More: http: //booksllc.net/?id=2376876