106 
William F. Adams 
reported Greenfield Lake specimens of Musculium transversum (Say, 
1829) and Eupera cubensis (Prime, 1865). Walter (1954) also reported E. 
cubensis from the lake in his discussion of the range of the species but 
did not disclose the source of the record. 
All published records from the Greenfield Lake system are summarized 
in Table 1. Names are presented as published without regard to subsequent 
taxonomic revisions or the possibilities of misidentifications, which are 
discussed later. 
SYNONYMY 
Most of the collections cited in Table 1 are old, and the names have 
undergone substantial taxonomic revision. The following brief discussion 
of synonymy brings these historical records into a modern taxonomic 
framework. Species names are still considered valid if they appear in 
Table 1 and are not discussed below. 
Gastropoda 
Clench (1962) synonomized the three forms of Campeloma rufum 
(Haldeman, 1841) with three separate species. Campeloma rufum was 
synonymized with C. crassulum Rafinesque, 1819, a species of the Great 
Lakes-St. Lawrence and the Mississippi drainages. Campeloma r. 
meridionale (Pilsbry, 1916) was synonomized with C. limum (Anthony, 
1860), and Campeloma r. geniculiforme (Pilsbry, 1916) was synonymized 
with C. geniculum. Which form Rehder (1949) collected in Greenfield 
Lake is unknown, and the ranges of C. geniculum and C. limum 
reported by Burch (1982) make either species a possibility. 
The genus Gillia Stimpson, 1865, has not been revised. Gillia 
crenata (Haldeman, 1840) has not been synonymized with any other 
forms; however, modern taxonomic keys make no reference to this 
species. Specimens of G. crenata in the National Museum of Natural 
History are being treated as G. altilus (Lea, 1841) (A. G. Gerberich, 
personal communication). 
Although its taxonomic status is still in doubt, Planorbis eucosmius 
(Bartsch, 1908) has been transferred to the genus Helisoma Swainson, 
1840 (Burch 1982). Burch (1982) speculated that P. eucosmius may 
simply be a juvenile form of //. anceps anceps (Menke, 1830), whereas 
Fuller (1977) assigned P. eucosmius to the South American genus 
Taphius H. & A. Adams, 1855. Proper taxonomic placement will not be 
possible until additional specimens are acquired for soft-tissue analysis. 
Planorbis magnificus (Pilsbry, 1903) was transferred to Planorbella 
Haldeman, 1842, by Baker (1945) and the species epithet emended to 
the feminine magnifica. Planorbis Muller, 1774, refers to Palearctic and 
Ethiopian forms (Burch 1982). 
