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Skeneimorph but not skeneid: systematics and anatomy of Lodderena Iredale, 1924 (Vetigastropoda: Trochoidea)

机译:Skeneimorph但不是Skeneid:Lodderena Iredale的系统性和解剖学,1924(vetigastropoda:Trochoidea)

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摘要

The genus Lodderena Iredale, 1924 has been classified in the Skeneidae by most recent authors. However, this family, originally characterized by their minute size, lack of nacre in the teleoconch and a rhipidoglossate radula, is currently considered to be polyphyletic assemblage, and preliminary molecular systematic data suggest exclusion of Lodderena from Skeneidae. In order to shed light on the systematic position of this genus, we provide a detailed description of the anatomy and histology of the type species, Lodderena minima (Tenison-Woods, 1878), and of L ornata (Olsson & McGinty, 1958). The anatomical data confirm the vetigastropodtrochoid nature of Lodderena but exclude the genus from Skeneidae. Skeneidae are mainly characterized by a propodial penis, a hermaphroditic condition with separated testis and ovary, and a large receptaculum in the mantle roof. In contrast, Lodderena species lack both a copulatory organ and receptaculum, and have a true ovotestis. We also provide a critical review of nominal species in the genus. Based on molecular and morphological evidence, we exclude Lodderena from Skeneidae, instead treating it as a genus incertae sedis within Trochoidea. We discuss the implications of small size for functional morphology and reproduction.
机译:Lodderena Iredale,1924年由最近的作者分类为Skeneidae。然而,这个家庭最初是特征在于他们的小尺寸,目前被认为是多膜和血红蛋白罗布拉雷格拉葡萄酒,并且初步分子系统数据表明从Skeneidae排除Lodderena。为了脱落在该属的系统位置,我们提供了物种类型,Lodderena Minima(Tenison-Woods,1878)和L Ornata(Olsson&McGinty,1958)的描述的详细描述。解剖数​​据证实了Lodderena的vetigaStrophodtroChoid性质,但排除了Skeneidae的属。 Skeneidae主要是丙糊糊的阴茎,一种具有分离的睾丸和卵巢的雌雄同体条件,以及在地幔屋顶中的大容易素。相比之下,Lodderena物种缺乏连结器官和容器,并且具有真正的卵子。我们还提供对属属中标称物种的关键评论。基于分子和形态证据,我们从Skeneidae排除Lodderena,而是将其作为Trochodea中的Incertae Sedis属。我们讨论小尺寸对功能形态和繁殖的影响。

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  • 来源
    《Journal of Molluscan Studies》 |2020年第3期|共16页
  • 作者单位

    Staatl Nat Wissensch Sammlungen Bayerns SNSB Zool Staatssammlung Munchen ZSM Munchhausen Str 21 D-81247 Munich Germany;

    Staatl Nat Wissensch Sammlungen Bayerns SNSB Zool Staatssammlung Munchen ZSM Munchhausen Str 21 D-81247 Munich Germany;

    Staatl Nat Wissensch Sammlungen Bayerns SNSB Zool Staatssammlung Munchen ZSM Munchhausen Str 21 D-81247 Munich Germany;

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  • 正文语种 eng
  • 中图分类 动物学;
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