76 
Rowland M. Shelley 
Subfamily Unioninae 
Tribe Lampsilini 
Villosa constricta (Conrad 1838) [= Lignumia (Micromya) constricta 
(Conrad) (Walter 1956); and Ligumia constricta (Conrad) and V. 
lienosa (Conrad) (Dawley 1965)] — Fig. 4-5. 
Diagnosis'. Valves small, sexually dimorphic, periostracum dark green 
to black; post-basal mantal margin papillate. 
Localities'. 2, 4, 19, 26, G. 
Remarks'. Walter (1956) collected V. constricta at nine unspecified sites 
in the upper Neuse basin; Johnston (1970) listed these along with two in 
the Tar, four in the Catawba, and two in the Cape Fear systems. In the 
Tar drainage, Clarke (1983) found living specimens at seven stations 
and empty valves at nine. Fuller (1977) considered V. constricta to be 
“Of Special Concern” to North Carolina. 
Villosa delumbis (Conrad 1834) [= Ligumia ( Micromya ) delumbis (Con- 
rad) (Walter 1956); Ligumia delumbis (Conrad), V. ogeecheensis 
(Conrad), and V. tenera (Lea) (Dawley 1965); V. ogeecheensis 
(Conrad) (Porter and Horn 1980); and V. delumbus (Conrad) 
(Johnson 1984)] — Fig. 7-8. 
Diagnosis'. Valves moderately large, sexually dimorphic, periostracum 
yellow; post-basal mantle margin papillate. 
Localities'. 9, 10, 11, 15, 16, 18, 19, 24, 26, N, P. 
Remarks'. Villosa delumbis is the most common lampsiline mollusk in 
the Cape Fear basin. Walter (1956) found it at only one site in the upper 
Neuse, but Johnson (1970) listed two localities in the Neuse, four in the 
Cape Fear, one in the Waccamaw, one in the Yadkin, and six in the 
Catawba basins. Porter and Horn (1980) and Johnson (1984) reported 
the species from Lake Waccamaw. The Neuse system is the northern 
range limit (Johnson 1970, Burch 1975); thus, Clarke (1983) did not 
encounter V. delumbis during his survey of the Tar River. 
Carunculina pulla (Conrad 1838) [= Toxolasma pullus (Conrad) (Porter 
and Horn 1980)]— Fig. 6 
Diagnosis'. Post-basal mantal margin with prominent caruncle. 
Localities'. 11, 17. 
Remarks'. Johnson (1967, 1970) and Burch (1975) give the range of this 
species as being from the Neuse River to Georgia. Clarke (1983) found 
one questionable specimen in the Tar drainage, and C. pulla has since 
been collected in the Tar River at Spring Hope, Nash County (Gerbe- 
rich, pers. comm.). University Lake at Chapel Hill (site 1 1) is the most 
commonly recorded North Carolina locality, but the species was also 
found in this study at site 17 in the Rocky River. Johnson (1970) 
recorded C. pulla from the Neuse River near Raleigh, but Walter failed 
