Taxonomic status and phylogenetic relationship of Anomura (Crustacea: Decapoda) based on mitochondrial sequences and gene order rearrangements

Wang, Zhengfei; Xu, Xinyi; Zheng, Yuqing; Wang, Jie; Yu, Qian; Liu, Bo

doi:10.1016/j.gene.2022.147042

Cited by 3 publications

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“…Richter and Scholtz (1994) and Scholtz (2014) presented the morphological characteristics of a hermit crab ancestry of lithodids, whereas McLaughlin & Lemaitre (1997), McLaughlin et al (2004McLaughlin et al ( , 2007, and Crustacean Research 52 Lemaitre & McLaughlin (2009) developed theories against this hypothesis. Starting with Zaklin (2001), all subsequent studies using molecular genetic analyses have strongly supported the "hermit-to-king" crab hypothesis (Morrison et al, 2002;Ahyong & OʼMeally, 2004;Ahyong et al, 2009;Hall & Thatje, 2009Schnabel et al, 2011;Tsang et al, 2008;Bracken-Grissom et al, 2013;Noever & Glenner, 2018;Tan et al, 2018Tan et al, , 2019Wang et al, 2023). However, there is no consensus whether lithodids are nested within the genus Pagurus.…”

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confidence: 99%

Variation of length and sequence of the nuclear ribosomal DNA internal transcribed spacer 1 supports “hermit-to-king” crab hypothesis

et al. 2023

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Lithodoid and paguroid crabs are morphologically assigned to the superfamilies Lithodoidea and Paguroidea, respectively. Molecular analyses, however, have revealed closer genetic proximity of the lithodoid crabs to the family Paguridae than to other families of Paguroidea, provoking a long debate. We investigated the length and nucleotide sequence variation of the nuclear ribosomal DNA internal transcribed spacer 1 (ITS1) in lithodoid and paguroid species. Uniquely short ITS1s (215-253 bp) were observed in seven lithodoid species. In contrast, ITS1 length varied considerably in 13 paguroid species belonging to the families Coenobitidae, Diogenidae, and Paguridae. Short-to-long ITS1s (238-1090 bp) were observed in five species of the family Paguridae, and medium to long ITS1s (573-1166 bp) were observed in eight species of the families Coenobitidae and Diogenidae. Considerably different size ITS1s coexisted in individual paguroid species. Nucleotide sequence analysis indicated that the short ITS1s observed in the family Paguridae were descendants of longer ITS1s and were homologous to the short ITS1 of lithodoid species. ITS1 sequences of the families Coenobitidae and Diogenidae shared no nucleotide elements with lithodoid and pagurid species. These molecular signals indicate that the short ITS1 in pagurid lineage was passed on to lithodoid lineage, strongly supporting the "hermit-to-king" crab hypothesis.

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