Naesiotus kublerensis Chambers, 1986

CLASSE: GASTROPODA: TERRESTRE

FAMÍLIA: BULIMULIDAE

ESPÉCIE: Naesiotus kublerensis Chambers, 1986

Tamanho médio: 11 mm

Ocorrência: Equador, Arquipélago de Galápagos, Ilha de Santa Cruz

Localidade tipo: Equador, Galápagos, Ilha de Santa Cruz, “Cueva de Kubler”

Nome original: Naesiotus kublerensis Chambers, 1986

Etimologia: o nome da espécie é uma referência à localidade tipo, a Cueva de Kubler

Comentários: Segundo Chambers, 1986: “as descrições presentes são baseadas apenas em material de concha; nem espécimes vivos nem partes moles preservadas são conhecidas pelo autor. Há evidências de declínios recentes e provável extinção em caracóis terrestres de Galápagos, então é possível que ambas as espécies recentemente descritas já estejam extintas.”

Descrição original:

(Chambers, 1986): “Shell conical, consisting of up to 7.75 whorls, fairly thin, narrowly umbilicate, reaching 10-12 mm in height and 4.8-5.7 mm in width, with proportion of width/height ranging from 0.4 to 0.51 and sides nearly straight in outline. Suture impressed. Protoconch of 1.5 to 1.75 whorls, sculptured with fine straight axial riblets.

Postembryonic whorls convex, very slightly shouldered at periphery, sculptured with fine axial wrinkles that become larger, rougher, and more irregular on later whorls, making last half of body whorl heavily wrinkled or rugose. Spiral sculpture of numerous closely spaced and very fine threads forming fine beads (visible under 10x magnification) as they pass over all but largest axial wrinkles. Peristome elongate—ovate and simple, except columellar margin reflected and continuous with a thin callus on parietal surface; when viewed from side, peristome straight and forming angle of about 25° with shell axis. Small parietal swelling within aperture sometimes present. Color brown or tan to cream, sometimes with pale band just below periphery.”

Fotos: (1-3)  Smithsonian National Museum of Natural History, HOLOTYPE de Naesiotus kublerensis, USNM “Santa Cruz Island, Cueva De Kubler, From Surface Rubble At Entrance Of Cave About 8 Ms SW Of Excavation IIA”, coletor: Steadman, D. W., xii.1980, “From interstices between boulders”, 10.9mm

Fontes:

Descrição original: Chambers, S. M. (1986). Two new bulimulid land snail species from Isla Santa Cruz, Galápagos Islands. The Veliger. 28(3): 287-293, figs. 1-3., disponível online em https://www.biodiversitylibrary.org/page/42480411
página(s): 289-292, fig. 3

Chambers, S. M. & Steadman, D. W. (1988). Holocene terrestrial gastropod faunas from Isla Santa Cruz and Isla Floreana, Galápagos: evidence for late Holocene declines. Transactions of the San Diego Society of Natural History. 21(6): 89-110, figs. 1, 2A-L, 3., disponível online em https://www.biodiversitylibrary.org/page/4287005
página(s): 99, 101, fig. 2L

Breure, A. S. H. & Borrero, F. J. (2008). An annotated checklist of the land snail family Orthalicidae (Gastropoda: Pulmonata: Orthalicoidea) in Ecuador, with notes on the distribution of the mainland species. Zootaxa. 1768: 1-40., disponível online em https://www.biotaxa.org/Zootaxa/article/view/zootaxa.1768.1.1
página(s): 13

MolluscaBase: https://www.molluscabase.org/aphia.php?p=taxdetails&id=1625935