Decapoda - Brachyura - Portunidae - Laleonectes

Laleonectes nipponensis (Sakai, 1938)



World Distribution
Crosnier & Moosa (2002 : 395) - Indo-ouest Pacifique. Comprend, Réunion (250 m), Philippine (15-25 m), Japon, Polynésie française (110-130 m). - Boyko & Liguori (2014, Pac. Sc.) - Indonesia, Japan [type locality of Neptunus (Hellenus) nipponensis], Hawai‘i (type locality of Portunus oahuensis), French Polynesia, Réunion, Philippines (Crosnier and Moosa 2002), Easter Island.
Mendoza & Devi (2017) - Widespread, Japan, Borneo, Indonesia, Tuamotu, central Philippines, Easter Island mostly shallow water (max. depth seems to be 130 m from Poupin, 1996, Tuamotu), but not Réunion ('L. nipponsensis' from that place attributed to L. kuriya sp. nov.).

Environnement : Marine - Substrat/Association : Hard bottom (rock and rubbles)

Vertical range : Shallow to deep-waters (e.g. 10-190 m) - Min-Max observed: 15-130 m

Mayotte data
Laleonectes nipponensis (Sakai, 1938)
Material examined — Mayotte KUW 2009, st. 23, Choizil pass, "Patate à Teddy", 15-30 m, 1 M young 10.5 x 21.2 mm (with spines), MNHN B32501, MNHN-IU-2009-1263.
Remarks — This specimen has a stridulating apparatus composed of ridges situated on the pterygostomian area and merus of cheliped. Crosnier and Moosa (2002) have reviewed four Portunidae species with such a stridulating apparatus and Mendoza and Devi (2017) have described an additional species from Réunion and southwestern coast of India, at depths of 100-250m. Mayotte specimen has juvenile characters and is tentatively attributed to Laleonectes nipponensis based on the shape of male G1, fresh color pattern, and P2 and P3 meri clearly overreaching distal end of P1 merus (in L. kuriya Mendoza and Devi, 2017, P2 and P3 do not overreach distal P1 merus).
Geographic and depth ranges — Mayotte (present study, single record in WIO) to Japan, French Polynesia; subtidal to 130m.

New Caledonia data
Corail 2 Nouvelle Caledonie, CP124 — Moosa MK.

Central Pacific data (Wallis & Futuna, Polynesia, Clipperton, Easter Island)
EASTER ISLAND - Laleonectes nipponensis - Boyko & Liguori, 2014: 568, Pac. Sc., Easter Island: usnm 1226913, 1 male (20.0 by 11.8 mm), Ahu Tepeu dock, 15.24 m depth, coll. H. Tonnemacher, 29 August 1999. usnm 1226912, 1 male (67.8 by 34.0 mm), Hanga Oteo, in cave, 12.19 m depth, coll. H. Tonnemacher, 26 August 1999.
FRENCH POLYNESIA - Portunus nipponensis - Poupin et al. 1990: 17 (French Polynesia; pro parte, some specimens are Laleonectes stridens). - Poupin, 1996a: 32, 98 (Checklist); 1996b: 36, pl. 17b (Moruroa; 130m). - Portunus sp. Nov. Cf. nipponensis - Poupin, 1996b: 36, in part pl. 17c only (specimen illustrated is from Rapa I, 110 m, and belongs to L. nipponensis; specimens indicated at localities p. 36 belong to L. stridens Crosnier & Moosa, 2002)). - Laleonectes nipponensis - Crosnier & Moosa, 2002: 390, 395 (Austral & Tuamotu, Moruroa, 110-130 m; coll. Frv Marara, fr). - Remark: Usually found in shallow waters (15-50m) but trapped to 130m in French Polynesia. - Laleonectes aff. Nipponenis - AAMP, Marquesas, 2012, Leg 3, St. MQ2-R, Nuku Hiva, 20-23 m, coll. Starmer et al., sample LC423, St. MQ19-B, Hiva Oa, 10-25 m, coll. Albenga et al., sample LC228. pre-det Poupin (check if stridulating apparatus is present and pleopod; chelae similar but front different ; L. nipponensis is in Hawaii under L. oahuensis (Edmonson, 1954), a synonym) - Laleonectes nipponesis - Schubart & Reuschel, 2009: Tab. 2, French Polynesia, MNHN-B31434.

References : PDF list, 214 pp (1.4 Mo)

This species in Worms Database