Globuloverruca, Young, 2004

Young, Paulo S., 2004, Globuloverruca spongophila gen. nov., sp. nov. a sponge-associated verrucid (Crustacea: Cirripedia: Thoracica) from Easter Island, with discussion on the morphology of the plate tubules, Zootaxa 420 (1), pp. 1-10 : 2

Genus Globuloverruca gen. nov.

Diagnosis: Shell globose, plates perforated by tubules. Opercular plates proportionally small and parallel to base. Rostrum and carina extended and incurved apically partially covering opercular plates, umbones apical. Scutum and fixed­scutum with well developed adductor ridges.

Type Species: Globuloverruca spongophila sp. nov., here designated.

Etymology: From the Latin globulus (globular) plus verruca; gender feminine.

Remarks: Globuloverruca gen. nov. is most similar to Verruca s.s. Both genera have tubules in the shell not found in any other verrucid genera. Otherwise, both genera developed a sophisticated articulation between the wall plates, especially the interdigitating ridges of the rostro­carinal suture. A well­developed adductor ridge on the movable scutum of Globuloverruca spongophila sp. nov. is only known in Verruca spengleri Darwin, 1854 and V. cookei Pilsbry, 1927 . Verruca spengleri also has the shell with a more protuberant rostrum and carina when compared with the fixed­scutum and tergum, but their apexes are not freely projected, which suggests an intermediate stage between the flat V. stroemia and the globose G. spongophila sp. nov.

Globuloverruca gen. nov. is distinguished from Verruca by presenting a globose shell and by the rostrum and carina incurved, extending over the opercular plates whereas Verruca has a flattened shell and unmodified rostrum and carina.