B. M. Landau & L. T. Groves 
Cypraeidae from the early Miocene of northem Venezuela 
Description. Shell small for genus, solid, 
subcylindrical, weakly posteriorly swollen, spire 
projecting, covered by adapical callus; sides angular to 
rounded, callused; ventrum almost fiat; aperture 
weakly parasigmoidal, anterior third dilated by 
hemispherical expansion; siphonal canal deep, 
abaxially asymmetrical and abapically orthogonally 
truncated; exhalant channel deeper, Iimited by paraliel 
lips; four anterior columellar teeth; other numerous 
inner teeth paraliel, extending deep within the 
aperture, bituberculate, abrupt, not extending over the 
angulation onto the ventrum; terminal ridge obsolète, 
merged into abapical edge. fringed with denticles from 
fossula on inner margin; fossula deep, concave, 
spoon-like, covered by narrow ridges, sometimes 
interrupted, joining fossular denticulation to anterior 
columellar teeth; 22-27 labral teeth, anterior third of 
labral teeth stretched out on constricted, depressed, 
hemicircular area; remainder heavier, outer lip 
bevelled inwards, with teeth extending across the 
bevelled inner portion; no colour pattern preserved, 
under UV light spots présent on marginal callus. 
Shell Formula. 33.2 (55.8 - 44.0) 22: 20 
specimen 
collection number 
length 
Width 
height 
LT 
CT 
Figs 71-73 
NMB II18403 
33.3 
18.8 
15.3 
22 
21 
Figs 74-77 
NHMW 2010/0036/0011 
33.0 
18.3 
13.9 
27 
22 
Figs 33-36 
UCMP 35536 
43.0 
26.0 
21.0 
27 
19 
Table 6. Dimensions and number of teeth; Trôna trinitatensis n. sp. 
Text-figure 5. Trôna trinitatensis (Mansfïeld, 1925) 
NMB H18403 (NMB coll.), length 33.3 mm. lower 
shell bed, 1 km Southwest of Casa Cantaure, about 10 
km west of Pueblo Nuevo, Paraguanâ Peninsula, 
Falcôn State, Venezuela. 
Discussion. The holotype of Trôna trinitatensis 
(Mansfïeld. 1925) is an internai niould collected from 
the Guaracara Limestone Member of the late early to 
early middle Miocene Tamana Formation of Trinidad 
and is difficult to identify with any certainty. 
According to Jung (1971), ail the other specimens 
from Trinidad recorded by Schilder (1939) are also 
internai moulds. Schilder (1939) also identified 
specimens from the middle Miocene Grand Bay 
Formation of Carriacou as Trôna (Macrocypraea) 
trinitatensis. According to Jung (1971) it was unlikely 
that the Carriacou shells were conspecific with those 
from Trinidad and that the larger Carriacou shells 
were doser to the living Macrocypraea zébra. 
According to Jung they differed ‘morphologically’ 
from the shells from T. trinitatensis from Trinidad, but 
he did not specify what these différences were. 
Figures 78-95 
78-81. Propustularia longidentata n. sp. Flolotype NFIMW 2010/0036/0012 (NMMW; ex. BL coll.), length 15.2 
mm. lower shell bed, 1 km Southwest of Casa Cantaure, about 10 km west of Pueblo Nuevo, Paraguanâ 
Peninsula, Falcôn State, Venezuela; 82-85. Propustularia longidentata n. sp. Paratype 1 NHMW 
2010/0036/0013 (NMMW; ex. BL coll.), length 14.5 mm. lower shell bed, 1 km Southwest of Casa Cantaure, 
about 10 km west of Pueblo Nuevo, Paraguanâ Peninsula, Falcôn State, Venezuela; 86-87. Propustularia 
longidentata n. sp. Paratype 2 NHMW 2010/0036/0014 (NMMW; ex. BL coll.), length 12.2 mm. lower shell 
bed, 1 km Southwest of Casa Cantaure, about 10 km west of Pueblo Nuevo, Paraguanâ Peninsula, Falcôn State, 
Venezuela; 88-91. Propustulariaparaguanensis n. sp. Holotype NHMW 2010/0036/0015 (NMMW; ex. BL 
coll.), length 17.2 mm. lower shell bed, 1 km Southwest of Casa Cantaure, about 10 km west of Pueblo Nuevo, 
Paraguanâ Peninsula, Falcôn State, Venezuela. 
92-93. Propustularia paraguanensis n. sp. Paratype 1 NHMW 2010/0036/0016 (NMMW; ex. BL coll.), length 
1 7.8 mm. lower shell bed, 1 km Southwest of Casa Cantaure, about 10 km west of Pueblo Nuevo, Paraguanâ 
Peninsula, Falcôn State, Venezuela; 94-95. Propustularia paraguanensis n. sp. Paratype 2 NHMW 
-010/0036/0017 (NMMW; ex. BL coll.), length 16.1 mm. lower shell bed, 1 km Southwest of Casa Cantaure, 
about 10 km west of Pueblo Nuevo, Paraguanâ Peninsula, Falcôn State, Venezuela. 
18 
