Munidopsis hystrix Faxon 1893
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 hystrix

description: <i>Munidopsis hystrix</i> Faxon, 1893 (Fig. 14 <i>a–h</i>.) Material examined <i>Lectotype.</i> MEXICO: Nayarit, off Tres Marias Islands, leg. USFC Steamer <i>Albatross</i>, Stn 3425, 18.iv.1891, 21.31666°N, 106.40000°W, 680 fms (1244 m): 1 M 17.1 mm (MCZ IZ-CRU-4549). <i>Paralectotypes</i>. Same collecting data as lectotype: 7 M 8.8–18.7 mm, 1 ov. F 16.4 mm, 2 F 8.8–12.2 mm (MCZ IZ-163060). <i>Non-type specimens</i>. MEXICO: western slope of Concepcion Canyon, Guaymas Basin, leg. Greg Rouse, Sigrid Katz, R/V <i>Western Flyer</i>, ROV <i>Doc Ricketts</i> dive D383 A2, 12.iv.2012, 26.88295°N, 111.658622°W, 823 m: 1 M 8.9 mm (SIO-BIC C14357). — MEXICO: leg. E/V <i>Nautilus</i>, ROV Hercules dive H1665, Stn NA092-058, 13.xi.2017, 19.24652°N 110.87116°W, 819 m: 1 M 15.3 mm (MCZ IZ-146311). USA: California, leg. E/V <i>Nautilus</i>, ROV Hercules dive H1455, Stn NA066-148, 8.viii.2015, 33.66012°N, 118.56919°W, 556 m: 1 F 8.5 mm (MCZ IZ-73853). — USA: California, leg. E/V <i>Nautilus</i>, ROV Hercules dive H1460, Stn NA067-011, 15.viii.2015, 33.45408°N, 118.67693°W, 702 m: 1 juvenile 2 mm (MCZ IZ-73638). — USA: California, leg. E/V <i>Nautilus</i>, ROV Hercules dive H1542, Stn NA075-002, 25.vii.2016, 33.74604°N, 118.61636°W, 795 m: damaged specimen (MCZ IZ-139982). — USA: Santa Monica Mound, off California, leg. Emily McLaughlin, Jessica Pruitt, R/V <i>Falkor</i>, ROV <i>SuBastian</i> dive S0172, Slurp 4, 15.x.2018, 33.83468°N, 118.67614°W, 780 m: 1 F 11.20 mm (SIO-BIC C14031). — USA: Emery Knoll, off California, leg. Emily McLaughlin, Jessica Pruitt, R/V <i>Falkor</i>, ROV <i>SuBastian</i> dive S0175, Slurp 4, 17.x.2018, 33.03611°N, 118.39808°W, 665 m: 1 F 3.5 mm (SIO-BIC C14037). — USA: off San Diego, California, leg. Greg Rouse and students, R/V <i>Robert Gordon Sproul</i> SP1913, otter trawl, 14.vii.2019, 32.8093°N, 117.4673°W to 32.8739°N, 117.5154°W, 700 m: 1 ov. F 19.9 mm (SIO-BIC C14102), 1 M 20 mm (SIO-BIC C14111). — USA: Forty Mile Bank, off San Diego, California, leg. Greg Rouse, Kaila Pearson, E/V <i>Nautilus</i>, ROV <i>Hercules</i> dive H1845, cruise NA124, 3.xi.2020, 32.60044°N, 118.02825°W to 32.59787°N, 118.01624°W, 1111–650 m: 1 F 11.1 mm (SIO-BIC C14470). Diagnosis Carapace spinose, dorsally covered by small spinules and setose scales, dorsal deep furrows, cervical grooves indistinct. Gastric region covered with spines, 1–2 pairs of well-developed epigastric spines, median cardiac spine well developed, preceded by a deep depression. Rostrum narrowly triangular, dorsally carinated, margin armed with 2–3 well-developed spines. Frontal margins concave. Orbit distinctly excavated, outer orbital angle delimited by antennal spine. Anterolateral angle armed with a strong spine. Anterior branchial margin armed with 3–4 welldeveloped spines; posterior branchial area dorsally armed with 3–4 pairs of well-developed spines, margin armed with small spines. Posterior carapace margin with 1–2 pairs of spines, preceded by a depression. Abdominal somites 2–4 with 2 transverse ridges, somite 2 armed with a pair of spines. Telson divided into 7 plates. Sternite 3 narrow, anterolateral angles produced, sternite 4 subtriangular. Eyes armed with dorsal spine, movable, epistomial spine absent. Article 1 of peduncle with well-developed dorsolateral and distolateral spines. Article 1 of antenna with distolateral spine. Mxp3 merus 0.5–0.6× longer than ischium, subrhomboidal in lateral view. P1 slender, elongate; meri and carpi with well-developed spines on all surfaces, fixed finger without denticulate carina on distolateral margin. P2–4 slender, spinose; dactyli slender, curving, flexor margin with teeth only at distal-half margin. Epipods absent from all pereopods. Distribution Galapagos Islands, Perú, Gulf of California, Baja California and California, from 436- to 1244-m depth. Genetic data <i>COI</i>, <i>16S</i> rRNA and <i>28S</i> rRNA. Remarks <i>Munidopsis hystrix</i> belongs to the group of species having a frontal margin with a delimited orbit, movable eye with small median spine projecting from upper surface, the abdomen armed with spines and the telson composed of 7–8 plates. This group of species includes <i>M. hystrix, M. opalescens</i> and <i>M. margarita</i> Faxon, 1893 from the East Pacific. These three species are morphologically and genetically similar. Differences relating to this complex are described in Remarks of <i>M. margarita</i>.
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 39, DOI: 10.1071/is22030, http://zenodo.org/record/7534735