ISSN 2755-3531
Checklist of the terrestrial gastropods of Brazil
Rodrigo B. Salvador, Marcel S. Miranda, Fernanda S. Silva, Cléo D. C. Oliveira, Janine O. Arruda, Daniel C. Cavallari, Suzete R. Gomes, Ariel La Pasta, Meire S. Pena, Ximena M. C. Ovando, Rafael M. Rosa, Anna C. A. Salles, Sonia B. Santos, Luiz R. L. Simone & Fabrizio M. Machado
Abstract. We compiled taxonomic information about terrestrial gastropods in Brazil in an organized and user-friendly checklist that we hope will be useful for researchers and stakeholders alike. We also expect that it will serve as a springboard, garnering more interest and enabling a new wave of studies on this fauna, which has one the highest extinction rates of all animal groups while being essential ecosystem functioning and also includes species of importance to public health and agriculture. We list all species of terrestrial gastropods that occur in the country, with information regarding synonymized names and fossils. We also propose a few nomenclatural acts to address some pending issues of easy resolution. A total of 748 species of terrestrial gastropods are known in Brazil, including 33 exotic species that have been introduced to Brazil. A total of 48 families are present, the majority of which belong to Stylommatophora; only six families represent the Neritimorpha, Caenogastropoda and Systellommatophora. The most speciose families are Bulimulidae, Strophocheilidae, Cyclodontinidae, Streptaxidae, and Simpulopsidae. Changes in nomenclature proposed here are as follows: Drymaeus obliquus poecilogramma Ancey, 1901 is now reclassified as Sanniostracus poecilogramma (Ancey, 1901) comb. nov.; Helix uniplicata Férussac, 1827 as Clessinia uniplicata (Férussac, 1827) comb. nov.; Zonitoides parana Baker, 1914 as Miradiscops parana (Baker, 1914) comb. nov.; “Helix” circumplexa Deshayes, 1839 as Systrophiella circumplexa (Deshayes, 1839) comb. nov.; Bradybaena giovannalimae Lima & Cossignani, 2021 as Streptaxis giovannalimae (Lima & Cossignani, 2021) comb. nov.
Key words. Cyclophoroidea, exotic species, land snails and slugs, Neritimorpha, Stylommatophora, Systellommatophora
Date of publication. 19 July 2024
DOI. https://doi.org/10.61733/jconch/4516
Julien Ryelandt, Quentin Wackenheim & Jean-Michel Bichain
Abstract. A population of a ramshorn snail species new to the French malacofauna, Gyraulus riparius (Westerlund, 1865), has been discovered in the fen surrounding Lake Cerin in southern Jura, eastern France. This population is located more than 450 km south of the previously known localities in Germany, and the species’ status as indigenous to France is therefore discussed. A review of palaeontological data show that the species has been recorded in eastern France during cold periods of the Middle and Lower Pleistocene. Furthermore, Lake Cerin is a small lake of glacial origin, located at an altitude of 766 m a.s.l., with little impact from human activities and inhabited by numerous threatened and protected boreo-alpine species. We postulate that this population indicates a wider past distribution, especially in the south, although we cannot exclude the hypothesis of a more recent introduction (natural or anthropic). We propose that G. riparius should be treated as a species native to France, as defined by the International Union for the Conservation of Nature, and targeted by a conservation and knowledge programme.
Key words. Jura Mountains, Lake Cerin, Quaternary, palaeomalacology, Planorbidae
Date of publication. 20 July 2024
DOI. https://doi.org/10.61733/jconch/4517
Marcel Sabino Miranda, Flávio Dias Passos & Alan Rodrigo Batistão
Abstract. Here, we report new occurrences of Mirinaba unidentata (G.B. Sowerby II, 1825) and review of the occurrence records M. unidentata and M. planidens (Michelin, 1831). A single shell of M. unidentata was collected in the Parque Estadual Caverna do Diabo, southern São Paulo state, Brazil. Moreover, material of both species deposited at the Museum of Zoology of University of São Paulo were observed. These two seem to have allopatric distributions, and not overlapping. Mirinaba planidens occurs in the mountain ranges shared by São Paulo, Rio de Janeiro, and Minas Gerais in southeastern Brazil, whereas M. unidentata occurs in the chain of mountains in southern São Paulo and southern Brazil. The regions where these species occur are approximately 500 km distant from each other. Due to the similarity of the shells and their distributions, it is tempting to think about these species as examples of divergence by allopatric speciation.
Key words. Atlantic Rainforest, land snail, inaccurate records, allopatry, São Paulo
Date of publication. 26 July 2024
DOI. https://doi.org/10.61733/jconch/4518
Guoyi Zhang
Date of publication. 26 July 2024
DOI. https://doi.org/10.61733/jconch/4519
José Liétor, Pedro A. Jódar, Juan Sánchez, Juan C. Martínez & Antonio R. Tudela
Abstract. The taxonomic status of Iberus globulosus has been unsatisfactorily resolved since its original description, but in 2008 a molecular phylogenetic study of the genus Iberus suggested that it could be a valid species. However, limited information on both its geographic distribution and its conchological variability has made it difficult to properly delineate the species. Our exhaustive sampling throughout the potential area of its geographic distribution and the morphological study herein, together with pre-existing genetic evidence, allow us to confirm the validity of I. globulosus. Consequently, we improve the characterization of I. globulosus by redescribing it. Additionally, we provide information on the potential for hybridization among I. globulosus and geographically and phylogenetically close congeneric species.
Key words. Iberus alonensis, Iberus carthaginiensis, Iberus campesinus, integrative taxonomy, Andalusia, Spain
Date of publication. 4 August 2024
DOI. https://doi.org/10.61733/jconch/4520
P. Graham Oliver, Maria-Judith Gonsalves, Deepak Samuel & Matteo Garzia
Abstract. A new species of a deep-sea Bathymodiolinae mussel is described as Gigantidas niobengalensis sp. nov. based on both molecular and morphological data. It was collected at a cold methane seep environment in the Bay of Bengal at 1750 m water depth. It is compared with other species of Gigantidas, especially the related G. childressi, G. mauritanicus, G. platifrons, and the G. haimaensis group.
Key words. Bathymodiolinae, Mytilidae, India, molecular systematics, anatomy, methane seep
Date of publication. 7 August 2024
DOI. https://doi.org/10.61733/jconch/4521
Justin Gerlach
Abstract. New records of Seychelles Streptaxidae are reported. These comprise new localities for Careoradula perelegans on Praslin and La Digue islands, and the description of a new species from Praslin island: Imperturbatia griffithsi. This brings the streptaxid fauna of the granitic Seychelles islands to 20 species (18 endemic).
Key words. Islands, land snail diversity, terrestrial molluscs
Date of publication. 11 August 2024