Pagurixus acanthocarpus Komai &amp; Okuno 2009
Creators: name: Osawa, Masayuki
name: Kawai, Takashi
name: Sakamaki, Takashi
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Decapoda
Paguridae
Pagurixus
Pagurixus acanthocarpus

description: <i>Pagurixus acanthocarpus</i> Komai &amp; Okuno, 2009 (Figs 1A, B, 3A) [Japanese name: Konpeitou-himehonyadokari] <i>Pagurixus acanthocarpus</i> Komai &amp; Okuno, 2009: 146, figs 5–8, 9C [type locality: Kashiwa-jima, Otsuki, Kochi Prefecture, southern Japan, subtidal].— McLaughlin <i>et al.</i> 2010: 31 (list). <b>Material examined.</b> Tanega-shima, Osumi Group: stn Annou 1, 30°41.4´N, 131°04.5´E, 7 m, 16 Aug. 2012, coll. T. Kawai, 1 female (sl 1.5 mm), RUMF-ZC 2321; stn Kurosenohana 3, 30°40.4´N, 131°03.8´E, 7 m, 13–14 Aug. 2012, coll. T. Kawai, 1 male (sl 1.4 mm), 1 ovig. female (sl 1.8 mm), RUMF-ZC 2322; stn Sumiyoshi 1, 30°38.7´N, 130°56.5´E, 7 m, 4–8 Aug. 2012, coll. T. Kawai, 1 female (sl 2.1 mm), RUMF-ZC 2323; stn Sumiyoshi 2, 30°40.0´N, 130°56.3´E, 7 m, 4–8 Aug. 2012, coll. T. Kawai, 1 male (sl 1.8 mm), 1 ovig. female (sl 1.6 mm), RUMF-ZC 2324. Yaku-shima, Osumi Group: stn Kurio 1-1, 30°13.9´N, 130°28.2´E, 7 m, 10 Aug. 2012, coll. T. Kawai, 1 male (sl 1.3 mm), RUMF-ZC 2325; stn Kurio 3-1, 30°16.4´N, 130°24.8´E, 7 m, 10 Aug. 2012, coll. T. Kawai, 1 male (sl 1.2 mm), RUMF-ZC 2326. Amakusa, Kumamoto Prefecture, Kyushu main island: stn Ushibuka 1-1, 32°09.0´N, 129°58.5´E, 3 Dec. 2012, coll. T. Kawai, 1 male (sl 1.7 mm), RUMF-ZC 2327. <b>Coloration in life.</b> The color pattern of the present specimens agrees well with that of <i>P. acanthocarpus</i> described and illustrated by Komai &amp; Okuno (2009, fig. 9C). See Fig. 1A, B. <b>Distribution.</b> Previously known only from Kashiwa-jima in Kochi Prefecture and Izu-oshima in the Izu Islands, Japan; subtidal to 8 m (Komai &amp; Okuno 2009). Now also recorded from Tanega-shima and Yaku-shima, Osumi Group in the northern Ryukyus, and Amakusa in the western coast of Kyushu main island, Japan; 7 m. <b>Habitat.</b> Rocky and coral reefs, on interspaces of rocks with algae and/or corals. <b>Remarks.</b> The present specimens agree well with the original description of <i>P. acanthocarpus</i> in the diagnostic aspects. The dorsal margin of the carpus of each second pereopod is somewhat protuberant, and exclusive of a dorsodistal spine, the margin has one to five (usually one or two), tiny or moderately small spines in males and is unarmed or armed with one or two tiny spines in females. In males, the coxa of the right fifth pereopod (Fig. 3A) has a short but distinct, collar-like “posteromesial protrusion” (see Komai &amp; Osawa 2006; Komai 2010), and the basal margin of its bearing prominent tuft of setae is more clearly demarcated than that of the holotype illustrated by Komai &amp; Okuno (2009, fig. 5I). The fourth pereopods are subequal in size on right and left and in both males and females; the setation is similar on right and left in males, but in females, setae on the mesial surfaces of the dactylus, propodus, carpus, and merus are longer and more pronounced on the left side than on the right side.
description: Published as part of <i>Osawa, Masayuki, Kawai, Takashi &amp; Sakamaki, Takashi, 2013, New records of Pagurixus Melin, 1939 (Crustacea: Decapoda: Paguridae) from the Ryukyu Islands, southwestern Japan, with description of a new species, pp. 350-366 in Zootaxa 3669 (3)</i> on page 351, DOI: 10.11646/zootaxa.3669.3.9, http://zenodo.org/record/5266714
description: {"references": ["Komai, T. &amp; Okuno, J. (2009) Two new species of the hermit crab genus Pagurixus (Decapoda: Anomura: Paguridae) from the western Pacific. Bulletin of the National Museum of Nature and Science, Series A (Zoology), Supplement, 3, 137 - 156.", "McLaughlin, P. A., Komai, T., Lemaitre, R. &amp; Rahayu, D. L. (2010) Annotated checklist of anomuran decapod crustaceans of the world (exclusive of the Kiwaoidea and families Chirostylidae and Galatheidae of the Galatheoidea) Part I - Lithodoidea, Lomisoidea and Paguroidea. The Raffles Bulletin of Zoology, Supplement, 23, 5 - 107.", "Komai, T. &amp; Osawa M. (2006) A review of the Pagurixus boninensis species group, with descriptions of six new species (Crustacea: Decapoda: Anomura: Paguridae). Zootaxa, 1214, 1 - 107.", "Komai, T. (2010) New species and new records of the hermit crab genus Pagurixus Melin, 1939 (Crustacea: Decapoda: Anomura: Paguridae) from the Indo-West Pacific. Journal of Natural History, 44, 1269 - 1342. http: // dx. doi. org / 10.1080 / 00222931003624812"]}