UDEMANS (1923) 4 created the genus Ledermuelleria (originally Ledermiilleria) for seven species which he transferred from Caligonus, Raphignathus, and Stigmaeus. Additional species have been referred to the genus since then. The genus thus comprises a substantial array of species, which are very uniform in their generic features. Problems in identification arise because the species have been described one or two at a time by various authors. The consequence is that generic rather than specific characters are emphasized in their descriptions and illustrations. Hence it has seemed desirable to emend the prior descriptions of segnis, clavata, rhodomela, ottavii, lacuna, pectinata, and plumifer, and to prepare a key for the identification of females for the eleven species, including four new ones, considered in this paper. The following named species not described herein complete the roster of species for the genus. The list includes also several species originally described in other genera which are believed to be appropriate to Ledermuelleria.
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