Some landsnails of the genus Humboldliana from Chihuahua and western Texas

Abstract

Humboldtiana (Gastropoda, Pulmonata, Helicoidea, Humboldtianidae) is endemic to higher elevations of central and northern Mexico, and southwestern Texas. The fauna of the Mexican State of Chihuahua is reviewed. Thirteen species are recorded from there. This is estimated to be a small percent ofthe species that occur in Chihuahua. Humboldtiana presidii Pilsbry, 1939 from Texas is redescribed and is elevated to specific status. Formerly it was classified as a subspecies of H. hogeana (Martens, 1892). New taxa are Gymnopallax n. subgen. for H. cicatricosa n. sp. (referred species: H. sylvania Thompson & Mejia, 2006); Clydonacme n. subgen. for H. regula (referred species: H. spectabile n. sp., H. titania n. sp., H. oberon n. sp., H. princeps n. sp. and H. hogeana Martens 1892); Aglotrochus n. subgen. for H. tanymastix n. sp. Humboldtiana balanites n. sp. and H. corruga Thompson & Mejia, 2006 are referred tentatively to the subgenus Humboldtiana. The primary types of H. hogeana Martens, 1892; H. presidii Pilsbry, 1939, and H. torrei Pilsbry 1935 are refigured. The subgeneric affinities of Humboldtiana torrei Pilsbry, 1935 and H. eulatioe Metcalf, 1984 are uncertain.