Tag Archives: urocoptidae

New Cuban species

A while ago (December 2017) Espinosa et al. published a paper which only now surfaced. Its abstract is extremely short, even not mentioning the names of the new species they described. “A commented and illustrated catalog of 37 land an freshwater mollusks species from Cupeyal del Norte, Alejandro de Humboldt National Park, Guantánamo, Cuba, is presented, 18 of them are new records to the park and 8 are described as new species, and data’s about others land mollusks species of the Park are included”.

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The new taxa introduced are:

[Helicinidae:] Emoda poeyana

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[Annulariidae:] Diplopoma (Subannularia) mucaralense

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Annularisca (Annularella) haylerae

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[Urocoptidae:] Arangia humboldtiana

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Carcinostemma silvai

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[Achatinidae:] Obeliscus (Stenogyra) diegoi

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[Cepolidae:] Coryda thierryi

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Coryda carabelloi

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Reference:
Espinosa J., Herrera-Uría J. & Ortea J., 2017. Moluscos terrestres y fluviales del Sector Cupeyal del Norte, Parque Nacional Alejandro de Humboldt, Guantánamo, Cuba, con la descripción de nuevas especies. – Revista de la Academia Canaria de Ciencias, 29: 61-110.

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New Idiostemma from Cuba

It is described the new species Idiostemma frankei into the subgenus Maceo Pilsbry & Vanatta 1898, with type locality at Farallones de Moa, on the northeastern region of Holguín province. For diagnosis were used conchological characters, that make it different from the rest of species into this genus because have whorls almost flattened or plane and semitransparent, with fine ribs on surface of shell. Columella with well-developed lamellae on “S” form, ornamented by ribs like cords that crossing on upper part on both side of the wall, give striated appearance”.

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The holotype is in the Instituto de Ecologia y Sistemática, CZACC8.1.302.

Reference:
Fernández, A. & Suárez, A., 2018. New species of Idiostemma Pilsbry & Vanatta, 1898 (Mollusca: Pulmonata: Urocoptidae) from the eastern Cuban region. – Poeyana, 507: 40-43.

Fossils from NE Mexico

Vega et al. just published a paper on fossils from northeastern Mexico. Their abstract reads as follows: “Additions are offered to the diverse estuarine, freshwater and terrestrial gastropod fauna of the Upper Cretaceous (Campanian) and Paleocene lithostratigraphic units of the Difunta Group, NE México (Coahuila and Nuevo León). Nineteen species of continental gastropods (five of them new) are reported and illustrated from the upper Campanian Cerro del Pueblo Formation (Las Águilas/Porvenir de Jalpa locality) and the Paleocene Las Encinas Formation (La Leona locality), northern Parras Basin, Difunta Group, Coahuila. The first record of pulmonate gastropods from the Difunta Group is based on several specimens of different species. This is the third contribution dealing with these continental gastropods from the study region and a revised list of reported species is presented. Although we follow the most recent classification of continental gastropods, we also base the identification on paleonto- logical systematics, knowing that some important diagnostic features were not preserved. Thus, we do not intend to propose paleobiogeographic or evolutionary inferences. Our main goal is to present the paleodiversity known from the study area, in hope that these data would be useful for more detailed studies in the near future”.

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The new species are Goniobasis unilirata, Pleurocera gigantica, Birgella burchi, Haitia taylori, and Holospira thompsoni. All new taxa are authored by Naranjo-García & Aguillón.

Reference:
Vega, F.J. et al., 2019. Additions to continental gastropods from the Upper Cretaceous and  Paleocene of NE Mexico. – Boletin de la Sociedad Geologica Mexicana, 71 (1):169-191.

Holospira in Oaxaca

Guerrero-Arenas et al. (2018) published about their findings of a Holospira species in Oaxaca state, Mexico. Their abstract reads: “Holospira (Bostrichocentrum) goldmani Bartsch, 1906 is an urocoptid gastropod distributed throughout northwestern Oaxaca in southern Mexico. Since its original description, posterior records have been restricted to the Mixteca Baja region of Oaxaca. The purpose of this paper is to expand on the geographical distribution of this species, georeferencing six additional localities. Five of our sites are located in the Mixteca Alta region of Oaxaca. Holospira goldmani can survive in soil derived from non-calcareous rocks. Field observations of ecological preferences of H. goldmani suggest that they are more ecologically tolerant than previously thought”.

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The pictures of the localities where these snails were found show the volcanic rocks and several pine forest demonstrating that this species is indeed ecologically tolerant and may be found in habitats where snails usually are not very abundant.

Reference:
Guerrero-Arenas, R. et al., 2018. New occurrences of Holospira (Bostrichocentrum) goldmani Bartsch, 1906 (Gastropoda, Urocoptidae) in northwestern Oaxaca, southern Mexico. – CheckList, 14 (1): 107-112.

New Urocoptid from Hispaniola

Just released: a paper by Thomas Watters dealing with the urocoptid genus Gyraxis, and describing a new species. The abstract reads “The genus Gyraxis in Hispaniola is reviewed, currently only known from the area of the Bahía de Samaná in the Dominican Republic. It includes three taxa: Gyraxis samana (Clench, 1966), G. sericata (Pilsbry, 1903) and G. excalibur new species. The radular morphology and isolation from Cuban Gyraxis suggest they may yet require a new genus”.

Watters also, when dealing with the nomen inquirendum Cylindrella gouldiana Pfeiffer, 1853, indicated this taxon has never been figured and that Crosse subsequently mentioned the first precise locality for the species (“Région Dominicaine: rochers du Tablaso, près San Cristobal (A. Sallé)”). Watters expressed “it is not clear how he knew this”. This answer is simple: Crosse always indicated behind his localities the collector of the material, in this case Sallé. The material which Crosse saw may either have been returned to Sallé or have ended up in the Crosse collection. Both collections have been dispersed after their owner’s death, and the current depository of the material is unknown.

Reference:
Watters, G.T., 2018. The genus Gyraxis Pilsbry, 1903 (Gastropoda: Urocoptidae) from Bahía de Samaná area of the Dominican Republic. – Journal of Conchology, 43: 103-108.

 

Cuban Callonia

The family Urocoptidae is very species-rich in Cuba, and the genus Callonia is but a small representative of this family, albeit very aesthetically. González-Guillén et al. (2017) just published a paper on this group.

Specimens of all western Cuban species of Callonia are illustrated, together with images of live animals and their habitat, followed by comments about recent field work. The putative relationships among species based on the morphological characteristics of last whorl soluteness and rib shape-orientation could be biased. Seemingly ecologic equivalent pairs C.loweiC.dautzenbergiana and C.elliottiC.gemmata are much alike in external appearance although genetic similarities, which have not yet been assessed, could be higher between species sharing the same range. A co-occurrence of Callonia snails with blackish lichen is discussed, raising the inference that Callonia use lichens as food source”.

These ecological observations are worth to be further explored. The putative hypothesis about the relations between the Callonia species can only be verified with molecular analysis.

Many thanks to Gijs Kronenberg for sharing this interesting paper.

Reference:
González-Guillén et al., 2017. Insights on the genus Callonia (Mollusca: Urocoptidae) from Western Cuba. – The Festivus, 49 (4): 332-338.

A brief Barbados visit

Today I saw the paper published by Franke already in 2015. Because of its interests for this blog, it is summarised here.

During a short visit to Barbados, the author found specimens of Pseudopineria barbadensis Kraus, 1996 and describes its habitat. From the same site a second species is reported, Truncatella barbadensis Pfeiffer, 1856.

Reference:
Franke, S., 2015. Fundortbestätigung: Pseudopineria barbadensis Kraus 1996 (Pulmonata: Urocoptidae) auf der Insel Barbados. – Mittheilungen Club Conchylia, 25: 19-22.