Between Vanuatu tides: a new brackish water acochlidian gastropod from Espiritu Santo

出現紀錄
最新版本 published by Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node on 8月 13, 2022 Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node

下載最新版本的 Darwin Core Archive (DwC-A) 資源,或資源詮釋資料的 EML 或 RTF 文字檔。

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說明

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.

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版本

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如何引用

研究者應依照以下指示引用此資源。:

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

權利

研究者應尊重以下權利聲明。:

此資料的發布者及權利單位為 Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node。 This work is licensed under a Creative Commons Attribution (CC-BY 4.0) License.

GBIF 註冊

此資源已向GBIF註冊,並指定以下之GBIF UUID: 650faeeb-5459-4495-9c12-5cf6a1e62bc0。  Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node 發佈此資源,並經由Ocean Biodiversity Information System同意向GBIF註冊成為資料發佈者。

關鍵字

Occurrence; Specimen

聯絡資訊

Timea P. Neusser
  • 元數據提供者
  • 出處
  • 連絡人
  • Author
Zoologische Staatssammlung München
  • Münchhausenstr. 21, D-81247
München
DE
Michael Schrödl
  • 出處
  • Author
Zoologische Staatssammlung München
  • Münchhausenstr. 21, D-81247
München
DE
Kevin Mackay

地理涵蓋範圍

Espiritu Santo Island, Vanuatu

界定座標範圍 緯度南界 經度西界 [-15.516, 167.198], 緯度北界 經度東界 [-15.516, 167.198]

分類群涵蓋範圍

Brackish water acochlidian gastropod

Species Pseudunela espiritusanta

引用文獻

  1. 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

額外的詮釋資料

marine, harvested by iOBIS

替代的識別碼 650faeeb-5459-4495-9c12-5cf6a1e62bc0
https://nzobisipt.niwa.co.nz/resource?r=pseudunelaespiritusanta