SOME LANDSNAILS OF THE GENUS HUMBOLDTIANA FROM CHIHUAHUA AND WESTERN TEXAS
Fred G. Thompson1
ABSTRACT
Hamboldtiana (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 of the 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. speclabile 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. eulaliae Metcalf, 1984 are uncertain.
Key Words: Mexico, Chihuahua, Texas, terrestrial, snails, Gastropoda, Humboldtiana.
TABLE OF CONTENTS
Introduction ...........................................................................................................62
Methods and Terminology......................................................................................62
Humboldtiana.........................................................................................................63
Humboldtiana presidii Pilsbry, 1939................................................................64
Humboldtiana balanites new species................................................................68
Humboldtiana corruga Thompson & Mijia, 2006...........................................72
Subgenus Gymnopallax new subgenus...................................................................72
Humboldtiana cicatricosa new species............................................................72
Homboldtiana sylvania Thompson & Mejia, 2006..........................................75
Subgenus Clydonacme new subgenus....................................................................75
Humboldtiana regula new species...................................................................76
Humboldtiana speclabile new species..............................................................79
Homboldtiana titania new species....................................................................82
Humboldtiana oberon new species.................................................................85
Humboldtiana princeps new species.................................................................87
Humboldtiana hogeana (Martens, 1892)........................................................90
Subgenus Aglotrochus new subgenus....................................................................92
Humboldtiana tanymastix new species............................................................92
Undetermined subgenus.........................................................................................97
P.O. Box 117800, Florida Museum of Natural History, University of Florida, Gainesville, FL 32611-7800 USA fgt(t<jflmnh.ufl.edu
Thompson, F.G. 2006. Some landsnails of the genus Humboldtiana from Chihuahua and western Texas. Bull. Florida Mus. Nat. Hist. 46(3):61-98.