Munidopsis piipa Marin 2020
Creators: name: Rodríguez-Flores, Paula C.
name: Seid, Charlotte A.
name: Rouse, Greg W.
name: Giribet, Gonzalo
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Decapoda
Munidopsidae
Munidopsis
Munidopsis piipa

description: <i>Munidopsis piipa</i> Marin, 2020 (Fig. 17 <i>a–d</i>.) Material examined <i>Non-type specimens</i>. USA: California, Pioneer Seamount, 7.ii.1950, 37.35000°N, 123.41666°W, 1097–822.96 m: 1 F 20.6 mm (CAS-IZ 190354). — USA: California, Pioneer Seamount, 7.ii.1950, 37.349957°N, 123.430026°W, 805.–988 m: 1 M 10.5 mm (CAS-IZ 190356). — USA: Forty Mile Bank, off San Diego, California, leg. Greg Rouse and Nicolas Mongiardino Koch, R/V <i>Falkor</i>, ROV <i>SuBastian</i> dive S0446, SCB-172, 31.vii.2021, 32.6029°N, 118.02571°W, 1035 m: 1 F 13.4 mm (SIO-BIC C14546). — USA: California, leg. Robert C. Vrijenhoek, R /V <i>Western Flyer</i>, ROV <i>Tiburon</i> dive T665, 2.v.2004, 33.10070°N, 120.96000°W, 870 m, 1 specimen not sexed, not measured (USNM 1463979). Distribution Bering Sea (Piip submarine volcano) at 984-m depth, California, from 805- to 1097-m depth. Genetic data <i>COI</i>, <i>16S</i> rRNA and <i>28S</i> rRNA. Remarks Newly recorded for the East Pacific. <i>Munidopsis piipa</i> belongs to a group of species with a rostral spine short and spiniform, frontal margin of the carapace straight and telson with 10–12 plates. This group includes <i>Munidopsis ariadne</i> Macpherson, 2011 from the eastern Mediterranean, <i>Munidopsis goodridgii</i> Alcock &amp; Anderson, 1899, <i>Munidopsis karukera</i> Macpherson, Beuck &amp; Freiwald, 2016 from the Caribbean Sea, <i>Munidopsis maunga</i> Schnabel &amp; Bruce, 2006, <i>Munidopsis milleri</i> Henderson, 1885 from the Philippines, <i>Munidopsis polymorpha</i> from shallow caves in the Canary Islands, <i>Munidopsis spinipes</i> MacGilchrist, 1905 from the Bay of Bengal and <i>Munidopsis kexueae</i> Dong, Gan &amp; Li, 2021 from seamounts near the Yap Trench, West Pacific. <i>Munidopsis piipa</i> closely resembles <i>M. kexueae</i> both morphologically and genetically. The descriptions of these species almost overlapped during the time of revisions and publication, therefore the species were not compared before our work. Phylogenetic and some species delimitation analyses do not support these species hypotheses, considering <i>M. piipa</i> and <i>M. kexueae</i> as a single taxon. However, haplotype networks demonstrate large genetic distances between the two species, with up to 4% of divergence for <i>COI</i> or 19 mutational steps (Fig. 4). The percentage of divergence between these species is low compared to other squat lobsters in the family, (e.g. Rodríguez-Flores <i>et al.</i> 2019 <i>b</i>, <i>Leiogalathea</i>); although some species of the abyssal clade have been delimited based on similar genetic distance values (Jones and Macpherson 2007; Dong <i>et al.</i> 2019). According to the original species descriptions (Marin 2020; Dong <i>et al.</i> 2021), spinulation on the carapace margins and relative width of the rostrum are different in both taxa. However, these morphological and genetic differences could be part of intraspecific variation and population genetic structure, as very few specimens have been analysed to date. More data, including the analyses of more specimens, would be desirable to solve this taxonomic problem.
description: Published as part of <i>Rodríguez-Flores, Paula C., Seid, Charlotte A., Rouse, Greg W. &amp; Giribet, Gonzalo, 2023, Cosmopolitan abyssal lineages? A systematic study of East Pacific deep-sea squat lobsters (Decapoda: Galatheoidea: Munidopsidae), pp. 14-60 in Invertebrate Systematics 37 (1)</i> on page 45, DOI: 10.1071/is22030, http://zenodo.org/record/7534735
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