Descrição
The majority of known acochlidian sea slug species are marine mesopsammic, while some others are limnic. The structural, functional and evolutionary background of the invasion of freshwater systems was hardly explored. During the expedition SANTO 2006 to Espiritu Santo, Vanuatu, we discovered a unique new acochlidian species in a brackish water habitat. Pseudunela espiritusanta n. sp. inhabits the underside of intertidal rocks deeply embedded into coarse sand, the interstices of which are filled with a mixture of fresh subsoil and seawater.
This new species possesses a typical acochlidian central nervous and digestive system; it is a simultaneous hermaphrodite with a special androdiaulic reproductive system and complex, stylet-bearing copulatory organs with associated glands. Such penial features may indicate a relationship with marine mesopsammic Pseudunela (Pseudunelidae) species, while e.g., the larger body size, the broad foot, and the presence of a special ventricular cell layer may be potential synapomorphies with limnic, benthic Acochlidiidae (Strubellia and Acochlidiidae s.s.).
Pseudunela espiritusanta n. sp. shares its special shape of head tentacles with both Pseudunela and Strubellia, while other characters are potentially synapomorphic with either one or the other taxon. Regardless of its unresolved exact systematic position, Pseudunela espiritusanta n. sp. evidently links marine and limnic taxa by its intermediate ecological and morphological features. Its considerable body size and well-developed heart and kidney can be considered as preadaptations to overcome osmotic challenges when colonising rivers from brackish coastal sands.
Registros de Dados
Os dados deste recurso de ocorrência foram publicados como um Darwin Core Archive (DwC-A), que é o formato padronizado para compartilhamento de dados de biodiversidade como um conjunto de uma ou mais tabelas de dados. A tabela de dados do núcleo contém 6 registros.
This IPT archives the data and thus serves as the data repository. The data and resource metadata are available for download in the downloads section. The versions table lists other versions of the resource that have been made publicly available and allows tracking changes made to the resource over time.
Versões
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Como citar
Pesquisadores deveriam citar esta obra da seguinte maneira:
Neusser T P, Schrödl M (2022): Between Vanuatu tides: a new brackish water acochlidian gastropod from Espiritu Santo. v1.1. Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node. Dataset/Occurrence. https://nzobisipt.niwa.co.nz/resource?r=pseudunelaespiritusanta&v=1.1
Direitos
Pesquisadores devem respeitar a seguinte declaração de direitos:
O editor e o detentor dos direitos deste trabalho é Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node. This work is licensed under a Creative Commons Attribution (CC-BY 4.0) License.
GBIF Registration
Este recurso foi registrado no GBIF e atribuído ao seguinte GBIF UUID: 650faeeb-5459-4495-9c12-5cf6a1e62bc0. Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node publica este recurso, e está registrado no GBIF como um publicador de dados aprovado por Ocean Biodiversity Information System.
Palavras-chave
Occurrence; Specimen
Contatos
- Provedor Dos Metadados ●
- Originador ●
- Ponto De Contato
- Originador
- Usuário
Cobertura Geográfica
Espiritu Santo Island, Vanuatu
| Coordenadas delimitadoras | Sul Oeste [-15,516, 167,198], Norte Leste [-15,516, 167,198] |
|---|
Cobertura Taxonômica
Brackish water acochlidian gastropod
| Espécie | Pseudunela espiritusanta |
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Citações bibliográficas
- Neusser, Timea P., Schrödl, Michael (2009): Between Vanuatu tides: 3D anatomical reconstruction of a new brackish water acochlidian gastropod from Espiritu Santo. Zoosystema 31 (3): 453-469, DOI: 10.5252/z2009n3a4, URL: http://www.bioone.org/doi/abs/10.5252/z2009n3a4 DOI: 10.5252/z2009n3a4
Metadados Adicionais
marine, harvested by iOBIS
| Identificadores alternativos | 650faeeb-5459-4495-9c12-5cf6a1e62bc0 |
|---|---|
| https://nzobisipt.niwa.co.nz/resource?r=pseudunelaespiritusanta |