Janetogalathea californiensis
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
Galatheidae
Janetogalathea
Janetogalathea californiensis

description: <i>Janetogalathea californiensis</i> (Benedict, 1902) family Munidopsidae stat. nov. (Fig. 5 <i>a</i>, <i>b</i>.) <i>Galathea californiensis</i> Benedict, 1902 Material examined <i>Non-type specimens</i>. USA: off San Diego, California, leg. Harim Cha, Kent Trego, R/V <i>New Horizon</i> student cruise; 28.x.2007, 32.67500°N, 117.36330°W, 175–300 m: 1 M 24.1 mm, 1 F 14.9 mm (SIO-BIC C11027). — USA: Crespi Knoll, off California, leg. Emily McLaughlin, Jessica Pruitt, R/V <i>Falkor</i>, ROV <i>SuBastian</i> dive S0169 Slurp 2, 13.x.2018, 33.09770°N, 117.86790°W, 484.2 m: 1 F 5.5 mm (SIO-BIC C14023). — USA: California, leg. E/V <i>Nautilus</i>, ROV Hercules dive H1534, Stn NA074-027-01, 14.vii.2018, 33.95930°N, 119.47540°W, 172.4 m: 1 F 9.5 mm (MCZ IZ-139642). Diagnosis Modified from Macpherson and Baba (2011). Carapace with transverse striae usually granulated with numerous short Fig. 3. Haplotype networks with haplotype distributions for (<i>a</i>) <i>Munidopsis aspera</i> and (<i>b</i>) <i>M. quadrata</i> + <i>M. carinipes.</i> setae and scattered stiff long setae, laterally with 4–6 spines, cervical grooves distinct. Rostral spine flattish, subtriangular, lateral margin usually with 3–4 lateral spines, proximal small. With a pair of epigastric spines. Frontal margins slightly oblique. Orbit not distinctly excavated, without outer orbital angle. Anterolateral spine of carapace strong. Branchial margin with 4 spines. Abdominal somites 2–4 with 2 transverse ridges, unarmed. Telson incompletely subdivided. Sternite 3 narrow, expanded laterally, sternite 4 subtriangular. Eyes large, movable, cornea strongly dilated. Article 1 of antennule Fig. 4. Haplotype networks with haplotype distributions for (<i>a</i>) <i>Munidopsis piipa</i> + <i>M. kexuae</i> and (<i>b</i>) <i>M. similis</i> + <i>M. asiatica.</i> with 3 well-developed spines. Article 1 of antenna with distomesial spines short, fused with orbit. Short and thick flagellum on Mxp1. Mxp3 merus as long as ischium, subrhomboidal in lateral view. P1 slender, elongate. P2–4 long and slender; dactyli slender, curving, flexor margin with spine-like setae. Epipods absent from all pereopods. Colouration Carapace and abdomen reddish or light orange. P1–4 light orange. Distribution Baja California, Gulf of California, Mexico Channel Islands, California, USA. From 89- to 3993-m depth (see comments in Hendrickx 2021 and Hendrickx <i>et al.</i> 2011, regarding <i>J. californiensis</i> geographic distribution). Genetic data <i>COI</i>, <i>16S</i> rRNA and <i>28S</i> rRNA. Remarks <i>Janetogalathea californiensis</i> is now included in the family Munidopsidae due to evidence from molecular phylogenetics placing this as sister group of <i>Leiogalathea</i>, according to nuclear and mitochondrial data. We investigated the presence of the chief synapomorphy of Munidopsidae, the absence of a short or reduced flagellum on the exopod of the Mxp1. The Mxp 1 exopod presents a short, thick pseudoflagellum, as in <i>Leiogalathea</i> (Ahyong <i>et al.</i> 2010). However, the validity of this character as a synapomorphy for Munidopsidae is questionable. Both <i>Leiogalathea</i> and <i>Janetogalahea</i> also share the presence of a broad triangular or subtriangular rostrum, a well-developed cornea and a carapace with few to several transverse setose striae. <i>Janetogalathea</i> and <i>Leiogalathea</i> could arguably form a clade that could be assigned family rank, showing morphological convergence with squat lobsters in the family Galatheidae but this will be addressed in future studies. The wide bathymetric distribution and dubious morphological identification of specimens from the Galapagos Islands (Arnés-Urgellés <i>et al.</i> 2020; Hendrickx 2021) suggest that <i>Janetogalathea californiensis</i> could constitute a species complex. A deeper study including genetic data across the species range should be conducted to test this hypothesis.
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 pages 21-24, DOI: 10.1071/is22030, http://zenodo.org/record/7534735
description: {"references": ["Benedict JE (1902) Descriptions of a new genus and forty-six new species of crustaceans of the family Galatheidae, with a list of the known marine species. Proceedings of the United States National Museum 26, 243 - 334. doi: 10.5479 / si. 00963801.26 - 1311.243", "Macpherson E, Baba K (2011) Chapter 2. Taxonomy of squat lobsters. In ' The Biology of Squat Lobsters'. (Eds GCB Poore, ST Ahyong, J Taylor) pp. 39 - 71. (CSIRO Publishing: Melbourne, Vic., Australia)", "Hendrickx ME (2021) Squat lobsters (Crustacea: Decapoda: Anomura: Galatheoidea) from off the northwestern coast of the Baja California Peninsula, Mexico. Zootaxa 4965, 375 - 384. doi: 10.11646 / zootaxa. 4965.2. 10", "Hendrickx ME, Ayon-Parente M, Serrano D (2011) Registro adicional de Janetogalathea californiensis (Anomura: Galatheidae) del Golfo de California central, Mexico, con notas de su distribucion. Hidrobiologica 21, 89 - 94. [In Spanish]", "Ahyong ST, Baba K, Macpherson E, Poore GCB (2010) A new classification of the Galatheoidea (Crustacea: Decapoda: Anomura). Zootaxa 2676, 57 - 68. doi: 10.11646 / zootaxa. 2676.1.4", "Arnes-Urgelles C, Buglass S, Ahyong ST, Salinas-de-Leon P, Wicksten MK, Marsh L (2020) Arthropoda; crustacea; decapoda of deep-sea volcanic habitats of the galapagos marine reserve, tropical eastern pacific. Biodiversity Data Journal 8, e 54482. doi: 10.3897 / BDJ. 8. e 54482"]}