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Taxonomy and distribution of species of Gastrocopta Wollaston 1878 (Mollusca: Gastropoda: Gastrocoptidae) from the Galápagos Islands (Ecuador)
Molluscan Research ( IF 1 ) Pub Date : 2019-01-20 , DOI: 10.1080/13235818.2019.1566842
Sergio E. Miquel 1, 2 , Fátima F. Brito 1
Affiliation  

A revision of Gastrocopta from the Galápagos Islands (Ecuador) is made. Four new species from Pinzón, Santa Cruz and Floreana Islands are described; species previously known are redescribed and new locations are added. Gastrocopta (Gastrocopta) reibischi is revalidated through new records from Floreana, Isabela and San Bartolomé Islands. Shell shape and the number, morphology and disposition of the apertural barriers support the discrimination of the taxa. The species have cylindrical to pupoid shells; the number of apertural barriers – differentiated as lamellae, folds and nodulae – varies between 4 and 11, almost completely occluding the aperture in the more complex cases. These structures are: angular-parietal, infraparietal, supracolumellar, columellar, subcolumellar lamellae, and supernumerary, basal, infrapalatal, lower-palatal, interpalatal, upper-palatal and suprapalatal folds. In addition to this classic scheme, a supernumerary fold and a nodule are added. Calcareous concretions – pustulae – are found in several species, mainly located in the peristome. The aulacognathous jaw and radular dentition formulae of Gastrocopta (Gastrocopta) clausa and Gastrocopta (Gastrocopta) munita, are described and photographed for the first time.



中文翻译:

来自加拉帕戈斯群岛(厄瓜多尔)的Gastrocopta Wollaston 1878(软体动物:腹足纲:Gastrocoptidae)物种的分类和分布

修改了加拉帕戈斯群岛(厄瓜多尔)的Gastrocopta。描述了来自Pinzón,Santa Cruz和Floreana群岛的四个新物种;重新描述了先前已知的物种,并添加了新位置。美食家(Gastrocopta)reibischi通过Floreana,Isabela和SanBartolomé群岛的新记录进行了重新验证。壳的形状和孔眼屏障的数量,形态和分布支持对分类单元的区分。该种具有圆柱状到类壳状的壳。裂孔屏障的数量(以薄片,褶皱和结节为特征)在4到11之间变化,在较复杂的情况下几乎完全遮盖了孔。这些结构是:顶角,顶下,小柱上,小柱,小柱下层,以及多余的,基部的,pal下的,pal下的,pal间的,pal上的和rap上的褶皱。除此经典方案外,还添加了多余的折痕和结核。钙质结石–脓疱–在几种物种中发现,主要位于peristome。首次描述和拍摄了天麻(Gastrocopta)clausa天麻(Gastrocopta)munita(Gastrocopta)munita

更新日期:2019-01-20
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