Tag Archives: Naesiotus sp.

Naesiotus sp. ‘krameri’

Kramer’s Galapagos Snail (Naesiotus sp. ‘krameri’)

This species was described in 1985, its species epithet, however, is now considered a nomen nudum, the reasons therefore are not known to me.

Kramer’s Galapagos Snail appears to have been quite common when it was discovered and described, it was found in all wetlands and in the Scalesia forests north of Cerro Puntudo on the island of Santa Cruz, Galápagos Islands. [1]

The species seems to have not been found alive during the most recent field searches and might be extinct.

*********************

References: 

[1] Guy Coppois: Etude de la spéciation chez les Bulimulidae endémiques de l’archipel des Galápagos (Mollusques, Gastéropodes, Pulmonés). Thèse de Doctorat, Libre de Bruxelles 1-283. 1985

*********************

edited: 01.06.2021

Naesiotus sp. ‘nilsodhneri’

Nils Odhner’s Galapagos Snail (Naesiotus sp. ‘nilsodhneri’)

Nils Odhner’s Galapagos Snail was described in 1985, its species epithet, however, is now considered a nomen nudum. 

The species was restricted to the arid zones in the south-east of Isla Santa Cruz in the Galápagos archipelago; it was not found alive during the last recent field surveys and is now feared to be extinct. 

*********************

References: 

[1] Guy Coppois: Etude de la spéciation chez les Bulimulidae endémiques de l’archipel des Galápagos (Mollusques, Gastéropodes, Pulmonés). Thèse de Doctorat, Libre de Bruxelles 1-283. 1985

*********************

edited: 01.06.2021

Naesiotus sp. ‘vanmoli’

Van Mol’s Galapagos Snail (Naesiotus sp. ‘vanmoli’)

Van Mol’s Galapagos Snail was described in 1985, its species name is now considered a nomen nudum, however.

The species was endemic to the southwestern part of the island of Santa Cruz in the Galápagos archipelago, where it was found in a narrow area only some 600 m wide in the arid zone at an altitude of about 65 m above sea level. [1]

Van Mol’s Galapagos Snail has not been found during the last field searches; it is thus believed to be most likely extinct. 

*********************

References: 

[1] Guy Coppois: Etude de la spéciation chez les Bulimulidae endémiques de l’archipel des Galápagos (Mollusques, Gastéropodes, Pulmonés). Thèse de Doctorat, Libre de Bruxelles 1-283. 1985

*********************

edited: 01.06.2021

Naesiotus sp. ‘josevillani’

Jose Villan’s Galapagos Snail (Naesiotus sp. ‘josevillani’)

Jose Villan’s Galapagos Snail was described in 1985, its species epithet, however, is now considered a nomen nudum, the reasons therefore are not known to me.

The species was endemic to the Isla Santa Cruz in the Galápagos archipelago, where it was found in the Scalesia forests of the higher altitudes. [1]

Jose Villan’s Galapagos Snail hasn’t been found during the most recent field searches and is thus considered very likely extinct.

*********************

References: 

[1] Guy Coppois: Etude de la spéciation chez les Bulimulidae endémiques de l’archipel des Galápagos (Mollusques, Gastéropodes, Pulmonés). Thèse de Doctorat, Libre de Bruxelles 1-283. 1985

*********************

edited: 01.06.2021

Naesiotus sp. ‘deridderi’

De Ridder’s Galapagos Snail (Naesiotus sp. ‘deridderi’)

This species was described in 1985, its species epithet, however, is a nomen nudum.

De Ridder’s Galapagos Snail occurred in the moister regions of the island of Santa Cruz; the animals apparently had a certain preference for the Arrow-leaved Sida (Sida rhombifolia L.) or the Prickly Sida (Sida spinosa L.), on whose branches they were often found. [1]

The species was not found alive during the last recent field studies and is feared to be extinct.

***

One of the few natural enemies of this species was the Woodpecker Finch (Camarhynchus pallidus (Sclater & Salvin)), which is known to occasionally pick up snails from the plants, which it subsequently beats against a twig or the like until the snail’s body detaches from the shell.  

The reason for the extinction of so many of the endemic snail species of the Galápagos Islands, however, is mainly due to the destruction of their habitats.  

*********************  

References:  

[1] Guy Coppois: Etude de la spéciation chez les Bulimulidae endémiques de l’archipel des Galápagos (Mollusques, Gastéropodes, Pulmonés). Thèse de Doctorat, Libre de Bruxelles 1-283. 1985
[2] G. Coppois: Threatened Galapagos bulimulid land snails: an update. In: E. Alison Kay: The Conservation Biology of Molluscs. Occasional Paper of the IUCN Species Survival Commision 9: 8-11. 1995 [3] C. E. Parent; R. P. Smith: Galápagos bulimulids: status report on a devastated fauna. Tentacle 14. 2006 
[4] C. E. Parent; B. J. Crepsi: Sequential colonization and diversification of Galapágos endemic land snail genus Bulimulus (Gastropoda, Stylommatophora). Evolution 60(11): 2311-2328. 2006

*********************

edited: 01.06.2021