An annotated checklist of species in the family Lagenophryidae (Ciliophora, Oligohymenophorea, Peritrichia), With a brief review of their taxonomy, morphology, and biogeography Author Mayén-Estrada, Rosaura Author Clamp, John C. text Zootaxa 2016 4132 4 451 492 journal article 10.11646/zootaxa.4132.4.1 ff19b27a-0f58-4285-b3b1-a7c9fa6a5ad2 1175-5326 257628 93EBA74C-E97B-42A6-9D82-1DF346533192 · Lagenophrys Stein, 1852 is the largest genus, with 62 known species. The lorica is usually hemispheroidal ( Fig. 2–3 ) but is ovoid ( Fig. 4 ) in a few species as an adaptation for attaching to setae of the host1. The lorica aperture is an invaginated tube (loricastome) closed by drawing the outer edges (lips) together ( Fig. 2 B–C). Characteristics of the lorica aperture, especially the lips, are remarkably diverse among species of Lagenophrys ( Fig. 4 ). Details of the lorica aperture are species-specific and, usually, show relatively little intraspecific variation (Clamp 1990); however, the lips of the lorica aperture are highly variable in a few species (Clamp 1990, 1992). Other than their distinctive lorica aperture, members of Lagenophrys are unique in undergoing a special sequence of asexual divisions (second-type division) to abandon the exoskeleton of the host.