Systematic revision of the Indo-West Pacific bubble-snails of the genus Haloa (Pilsbry, 1921) (Cephalaspidea : Haminoeidae)

IF 1.8 2区生物学 Q3 EVOLUTIONARY BIOLOGY

Invertebrate Systematics Pub Date : 2022-06-08 DOI:10.1071/IS21011

Trond R. Oskars, M. A. Malaquias

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引用次数: 1

Abstract

Abstract. The genus Haloa includes dull-coloured species of haminoeid snails inhabiting tidal and shallow waters of the tropical and sub-tropical Indo-West Pacific. This paper reports on the diversity and systematics of Haloa based on the phylogenetic hypothesis generated by Oskars and Malaquias (2019) and on the morphological study of specimens. Shells, external features and anatomical characters from the jaws, radula, gizzard plates and male reproductive system were studied by optical and scanning electron microscopy. The molecular species delimitation method Automatic Barcode Gap Discovery, using DNA sequences of the cytochrome c oxidase subunit I gene, was implemented to aid delimiting candidate species. Thirteen species were recognised as valid, including two new to science, namely Haloa cobbi, sp. nov. and Haloa eora, sp. nov., and one unnamed species herein referred to as Haloa sp. 1. Species depict intraspecific variability in their colouration and little character displacement in their anatomy. Shells are of limited taxonomic use; only details of the male reproductive system (e.g. fundus) and the DNA were truly diagnostic. Three species have an Indo-West Pacific distribution and three are restricted to the Indian Ocean. The remaining seven species occur in the Western and Central Pacific Ocean, three of them having geographical ranges restricted to offshore islands.

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印度-西太平洋海螺属的系统修正(Pilsbry, 1921)(头纲:海螺科)

摘要Haloa属包括栖息在热带和亚热带印度-西太平洋的潮汐和浅水区的深色哈密蜗牛。本文基于Oskars和Malaquias（2019）提出的系统发育假说和标本的形态学研究，报道了Haloa的多样性和系统学。用光学显微镜和扫描电子显微镜研究了颌、舌、鳃板和雄性生殖系统的外壳、外部特征和解剖特征。利用细胞色素c氧化酶亚基I基因的DNA序列，实现了分子物种划界方法“自动条形码间隙发现”，以帮助划界候选物种。13个物种被认为是有效的，包括两个新的科学物种，即Haloa cobbi，sp.nov.和Haloa eora，sp.nov，以及一个未命名的物种，本文称为Haloa sp.1。物种在颜色上表现出种内变异性，在解剖结构上几乎没有特征位移。贝壳在分类学上的用途有限；只有男性生殖系统的细节（例如眼底）和DNA才是真正的诊断。三个物种分布在印度洋-西太平洋，三个仅限于印度洋。其余七种分布在西太平洋和中太平洋，其中三种的地理范围仅限于近海岛屿。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Invertebrate Systematics 生物-动物学

CiteScore

4.30

自引率

9.10%

发文量

审稿时长

>12 weeks

期刊介绍： Invertebrate Systematics (formerly known as Invertebrate Taxonomy) is an international journal publishing original and significant contributions on the systematics, phylogeny and biogeography of all invertebrate taxa. Articles in the journal provide comprehensive treatments of clearly defined taxonomic groups, often emphasising their biodiversity patterns and/or biological aspects. The journal also includes contributions on the systematics of selected species that are of particular conservation, economic, medical or veterinary importance. Invertebrate Systematics is a vital resource globally for scientists, students, conservation biologists, environmental consultants and government policy advisors who are interested in terrestrial, freshwater and marine systems. Invertebrate Systematics is published with the endorsement of the Commonwealth Scientific and Industrial Research Organisation (CSIRO) and the Australian Academy of Science.