What is "rehderella"

Rehderella belyaevi is an unusual and monotypic barnacle genus restricted to Easter Island and Pitcairn Island. Two other barnacle species are found in the intertidal zone of these islands. Euraphia devaneyi is much larger, and possesses calcareous basis. Tesseropora sp. has four shell plates with a single row of pores in shell wall. Both Euraphia and Rehderella have six shell wall plates. Rehderella differs from both in its membraneous basis and fusion of opercular plates on each side.

Nesochthamalus intertextus is the only other Pacific Ocean barnacle with fused opercular plates. Nesochthamalus possesses a partially calcareous saucer-shaped basis, and fused opercular plates which show no visible trace of former articulation. Rehderella shows a line at the former articulation.