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Marrying molecules and morphology: first steps towards a reevaluation of solariellid genera (Gastropoda: Trochoidea) in the light of molecular phylogenetic studies
Journal of Molluscan Studies ( IF 1.2 ) Pub Date : 2020-03-09 , DOI: 10.1093/mollus/eyz038
S T Williams 1 , Y Kano 2 , A Warén 3, 4, 5 , D G Herbert 6
Affiliation  

The assignment of species to the vetigastropod genus Solariella Wood, 1842, and therefore the family Solariellidae Powell, 1951, is complicated by the fact that the type species (Solariella maculata Wood, 1842) is a fossil described from the Upper Pliocene. Assignment of species to genera has proved difficult in the past, and the type genus has sometimes acted as a ‘wastebasket’ for species that cannot easily be referred to another genus. In the light of a new systematic framework provided by two recent publications presenting the first molecular phylogenetic data for the group, we reassess the shell characters that are most useful for delimiting genera. Shell characters were previously thought to be of limited taxonomic value above the species level, but this is far from the case. Although overall shell shape is not a reliable character, our work shows that shell characters, along with radular and anatomical characters, are useful for assigning species to genera. Sculpture of the early teleoconch (the region immediately following the protoconch) and the columella are particularly useful characters that have not been used regularly in the past to distinguish genera. However, even with the combination of all morphological characters used in this study (shell, radular and eye), a few species are still difficult to assign to genera and in such cases molecular systematic data are essential. In the present study, we discuss 13 genera—12 of which were recovered as well-supported clades in recent molecular systematic studies—and provide morphological characters to distinguish them. We describe several new taxa: Chonospeira n. gen. (referred to as ‘clade B’ in previous molecular systematic studies), Phragmomphalina n. gen. (Bathymophila in part in molecular systematic studies) and Phragmomphalina vilvensi n. sp. (type species of Phragmomphalina n. gen.). We synonymize Hazuregyra Shikama, 1962 with Minolia A. Adams, 1860, Minolia subangulata Kuroda & Habe, 1952 with Minolia punctata A. Adams, 1860 and M. gemmulata Kuroda & Habe, 1971 with M. shimajiriensis (MacNeil, 1960). We also present the following new combinations: Bathymophila bairdii (Dall, 1889), B. dawsoni (Marshall, 1979), B. regalis (Marshall, 1999), B. wanganellica (Marshall, 1999), B. ziczac (Kuroda & Habe in Kuroda, Habe & Oyama, 1971), Chonospeira nuda (Dall, 1896), C. iridescens (Habe, 1961), C. ostreion (Vilvens, 2009), C. strobilos (Vilvens, 2009), Elaphriella corona (Lee & Wu, 2001), E. diplax (Marshall, 1999), E. meridiana (Marshall, 1999), E. olivaceostrigata (Schepman, 1908), E. opalina (Shikama & Hayashi, 1977), Ilanga norfolkensis (Marshall, 1999), I. ptykte (Vilvens, 2009), I. zaccaloides (Vilvens, 2009), Minolia shimajiriensis (MacNeil, 1960), M. watanabei (Shikama, 1962), Phragmomphalina alabida (Marshall, 1979), P. diadema (Marshall, 1999), P. tenuiseptum (Marshall, 1999), Spectamen euteium (Vilvens, 2009), S. basilicum (Marshall, 1999), S. exiguum (Marshall, 1999) and S. flavidum (Marshall, 1999).

中文翻译:

结合分子和形态:根据分子系统发育研究重新评估太阳solar科属(Gastropoda:Trochoidea)的第一步

物种的vetigastropod属分配Solariella木,1842年,因此,家庭Solariellidae鲍威尔,1951年,是由复杂的,因为该类型品种(Solariella斑伍德(Wood,1842)是从上新世描述的化石。在过去,很难将物种分配给属,并且类型属有时会充当无法轻易称为另一个属的物种的“垃圾桶”。鉴于最近两份出版物提供了一个新的系统框架,这些出版物提出了该组的第一个分子系统发育数据,我们重新评估了最有效的用于界定属的壳特征。以前认为壳类在物种水平以上的分类学价值有限,但事实并非如此。尽管总体壳形不是可靠的特征,但我们的工作表明壳形特征以及胚根和解剖特征可用于将属分配给属。早期的海螺(原海螺紧随其后的区域)和小柱的雕塑是特别有用的角色,过去从未经常使用它们来区分属。但是,即使将本研究中使用的所有形态特征(壳,胚根和眼)组合在一起,仍然很难将少数物种归为属,在这种情况下,分子系统数据是必不可少的。在本研究中,我们讨论了13个属-在最近的分子系统研究中已将12个属作为支撑良好的枝条回收-并提供了形态特征以区分它们。我们描述了几个新的分类单元:即使结合本研究中使用的所有形态特征(壳,胚根和眼),仍然很难将少数物种归为属,在这种情况下,分子系统数据是必不可少的。在本研究中,我们讨论了13个属-在最近的分子系统研究中已将12个属作为支撑良好的枝条回收-并提供了形态特征以区分它们。我们描述了几个新的分类单元:即使结合本研究中使用的所有形态特征(壳,胚根和眼),仍然很难将少数物种归为属,在这种情况下,分子系统数据是必不可少的。在本研究中,我们讨论了13个属-在最近的分子系统研究中已将12个属作为支撑良好的枝条回收-并提供了形态特征以区分它们。我们描述了几个新的分类单元:Chonospeira ñ。gen。(在先前的分子系统研究中称为“进化枝B”),Phragmomphalina。gen。(嗜盐杆菌属部分在分子系统研究中)和Phragmomphalina vilvensi n。sp。(Phragmomphalina n.gen。的类型种类)。我们synonymize Hazuregyra饰磨,1962年Minolia A.亚当斯,1860年,Minolia subangulata黑田东彦与HABE,1952年花绳钟螺A.亚当斯,1860和M. gemmulata黑田和HABE,1971年中号shimajiriensis(MacNeil,1960年)。我们还提出以下新组合:Bathymophila bairdii(达尔,1889年),B. dawsoni(马歇尔,1979年),B. regalis(马歇尔,1999年),B. wanganellica(马歇尔,1999年),B. ziczac(黑田和HABE在黑田东彦,HABE和大山,1971年),Chonospeira蘑(达尔,1896年),C. iridescens(HABE,1961),C. ostreion(Vilvens,2009),C. strobilos(Vilvens,2009),Elaphriella电晕(李和Wu,2001),大肠杆菌diplax(马歇尔,1999),大肠杆菌Meridiana的(马歇尔,1999),大肠杆菌olivaceostrigata(Schepman,1908),大肠杆菌opalina(饰磨&林,1977),Ilanga norfolkensis(马歇尔,1999年),一ptykte(Vilvens,2009年),一个zaccaloides(Vilvens,2009年),Minolia shimajiriensis(麦克尼尔,1960年),M。watanabei(饰磨,1962年),Phragmomphalina alabida(马歇尔,1979年),P.迪亚德马(马歇尔,1999),P。tenuiseptum(马歇尔,1999),Spectamen euteium(Vilvens,2009),S.罗勒(马歇尔,1999),S. exiguum(马歇尔,1999)和S. flavidum(马歇尔(1999)
更新日期:2020-04-23
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