Malacology
Malacology is the study of mollusks. This includes animals like octopus, snails, slugs, and clams. It is the second largest phylum of animals, making them one of the most successful groups on the planet. There are over 80,000 described species of mollusks with many more left to be discovered. Mullusca is composed of 8 recognized classes including Cephalopoda, Gastropoda, Polyplacophora, Scaphapoda, Monoplacophorans, the Aplacophorans, Caudofoveata and Solenogastres, and Bivalvia.
Copper Dome
(B. Walker & Pilsbry, 1902)
Ventridens theloides
Class:
Order:
Family:
Gastropoda
Stylommatophora
Gastrodontidae

ANSP 56914 [paralectotype]
Ecological Information
Native/Inavsive:
Native
Nature Serve Conservation Status:
G4: Apparently Secure
Median Size:
4.8
Height:
Width:
7.8
Taper:
0.3
Taxonomic Information
Gastrodonta gularis theloides
Original Combination:
Etymology
Original Description:
Shell glossy, yellow, perforate, with moderately raised, dome-shaped spire, composed of 7 ½ to 8 narrow, closely coiled whorls; the last hardly regular at the periphery in adult shells; rather strongly striate above, nearly smooth beneath, with faint traces of spiral striae near the umbilicus, where the base is rather conspicuously excavated. Aperture somewhat triangular, the sloping basal lip being straight. The peristome is acute, strengthened within by a rather wide, low callous rim. Adult shells are without teeth or laminae. Alt. 4 ½ - 5, diam. 7 ½ -8 mm.
Young shells (5 to 6 mm. diam., Pl. XXV, fig. 4) are nearly discoidal, with the umbilicus as wide as in adults, base glossy, sculptured like the adult shells, the aperture armed within with two long strong lamellae, the summit of the outer one curving toward the inner; there is also, in early stages, a smaller lamella peripheral in position.
"North Carolina" (A. D. Brown coll., No. 56,914 A. N. S.); Black mountains, N. C. (Henry Hemphill); abundant on Bluff mountain; a few only at Meadow Cove, Wilson's and Ml. Mitchell.
Fig. 3 is from one of A. D. Brown's specimens; figs. 1, 2, 4 are from Bluff Mountain shells, collected by Walker.
This race was recognized by A. D. Brown many years ago and named in his collection (now in coll. A. N. S. P.), but it seems never to have been characterized by him. Various correspondents in America and England have submitted similar shells to one of us, and had them so named ; owing to the desire to avoid overloading the nomenclature of a difficult group, the name has not hitherto beep published.
The specimens now brought to light demonstrate the necessity of recognizing the race. It differs from G. g. lawae (W. G. B. ) in the much narrower umbilicus; from G. gularis of the Great Smoky mountains in being toothless in the adult stage, and with a more excavated base and straighter basal lip. No adult shell, in a large number examined, possessed internal laminae.
Original Description Citation:
Walker, B. & Pilsbry, H. A. (1902). The Mollusca of the Mt. Mitchell Region, North Carolina. Proceedings of the Academy of Natural Sciences of Philadelphia. 54 (2): 413-442, plates 24-25.
Citations
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