Seriaster regularis Jangoux, 1984

Mah, Christopher L. & Fujita, Toshihiko, 2020, New species and occurrence records of Japanese Solasteridae and Ganeriidae including a new species of Paralophaster from the North Pacific with an overview of Hyalinothrix, Zootaxa 4750 (1), pp. 67-100 : 95-96

Seriaster regularis Jangoux, 1984

Seriaster regularis Jangoux, 1984: 284 ; A. M. Clark 1993: 191; Kogure & Kaneko 2010: 97.

Comments. Measurements of specimens below were taken from what appeared to be the longest (and most undamaged) arm.

Relatively little variation was observed between observed populations with color, arm number, furrow spines and paxillar spines appearing consistently within the range outlined by the original description by Jangoux (1984). This is consistent with observations made by Kogure & Kaneko (2010) for S. regularis recorded from Okinawa. Specimens observed throughout this species’ range demonstrate two or three regenerating arms which are consistent with the observation by Jangoux (1986) that this species is fissiparous and can reproduce asexually.

Occurrence: Japan (Ogasawara & Okinawa), New Caledonia , Vanuatu, New Hebrides, Philippines, Madagascar. 25–313 m. (depth range extended)

Specimen Records: Madagascar. MNHN IE-2007-3963 Madagascar, 24º23′S, 47º32′E, 313 m, Coll. Atimo Vatae, 1 wet spec ., R=7.9 r=0.8, 6 arms;

Japan. NSMT E-10637, East of Nishi-jima Island, Ogasawara Islands , 27˚7.27′N, 142˚10.562′E–27˚7.456′N, 142˚10.441′E, 47.9–52.3 m, Coll . R / V Koyo St. KY-16-19, 13 July 2016, 1 wet spec ., R =2.2, r=0.3, 8 arms; NSMT E- 10635, South of Nishi-jima Island, Ogasawara Islands , 27˚6.65′N, 142˚10.42′E–27˚6.61′N, 142˚10.29′E, 59–60.1 m , R / V Koyo , St. 27, 9 July 2010, 1 wet spec ., R =2.2 r=0.3, 8 arms; NSMT E-10636, Southeast of Chichi-jima Island, Ogasawara Islands , 27˚1.536′N, 142˚7.388′E–27˚1.855′N, 142˚7.414′E, 133–134 m, Coll . R / V Koyo , St. KY-16-01, 11 July 2016, 1 wet spec ., R =0.8 r=0.2; NSMT E-10638, West of Chichi-jima Island, Ogasawara Islands , 27˚5.235′N, 142˚8.57′E–27˚5.376′N, 142˚8.794′E, 94.7– 91.8 m, Coll . R / V Koyo , St. KY-16-25, 13 July 2016, 7 wet specs , R =1.0, r=0.1, 8 arms, R =0.9 r=0.4, 4 arms, R =0.8, r=0.1, 4 arms, R =0.9 r=0.19, 8 arms, R =1.3 R =0.15, 8 arms, R =0.8 r=0.1, 4 arms, R =0.9 r=.19, 7 arms; NSMT E-10639, East of Chichi-jima Island, Ogasawara Islands ., 27˚4.255′N, 142˚17.104′E–27˚4.255′N, 142˚17.104′E, 141 m, Coll . R / V Koyo , St. KY-16-31, 14 July 2016, 2 wet specs ., R =1.2, r=0.2, 7 arms, R =n/a (all arms damaged) r=0.5, 8 arms; NSMT E-10640, East of Chichi-jima Island, Ogasawara Islands , 27˚4.23′N, 142˚17.097′E–27˚4.802′N, 142˚16.982′E, 141–147 m, Coll . R / V Koyo , St. KY-16-32, 14 July 2016, 1 wet spec ., R =1.2 r=0.2, 8 arms; USNM E44942 , 1 km WNW Onna Village (Horseshoe Cliffs), Okinawa Island , Ryukyu Islands , 26º30′ 00″N 127º50′54″E, 64 m, Coll . R.F. Bolland, 29 April 1987, 1 dry spec ., R =2.6 (longest arm), r=0.3, 5 arms; USNM E44943 , 1 km WNW Onna Village (Horseshoe Cliffs), Okinawa Island , Ryukyu Islands , 26º30′ 00″N 127º50′54″E, 67.1 m, Coll . R.F. Bolland, 2 September 1988, 1 dry spec ., R =2.6 r=0.3, 7 arms; USNM E44944 , 1 km WNW Onna Village (Horseshoe Cliffs), Okinawa Island , Ryukyu Islands , 26º30′ 00″N 127º50′54″E, 51.8 m, Coll . R.F. Bolland, 24 May 1984, 2 dry specs ., R =3.7 (longest) r=0.3, 7 arms, R =2.4 (longest) r=0.2, 6 arms; USNM E45043 , 1 km WNW Onna Village (Horseshoe Cliffs), Okinawa Island , Ryukyu Islands , 26º30′ 00″N 127º50′54″E, 61–68.6 m, Coll . R.F. Bolland, 26April 1986, 1 dry spec ., R =3.0 r=0.2, 8 arms; USNM E45082 , 1 km WNW Onna Village (Horseshoe Cliffs), Okinawa Island , Ryukyu Islands , 26º30′ 00″N 127º50′54″E, 57.95 m, Coll . R.F. Bolland, 24 March 1985, 1 dry spec ., R =2.8 r=0.2, 8 arms; USNM E45097 , 1 km WNW Onna Village (Horseshoe Cliffs), Okinawa Island , Ryukyu Islands , 26º30′ 00″N 127º50′54″E, 61–65 m, Coll . R.F. Bolland, 18April 1986, 1 dry spec ., R =3.1 r=0.2, 5 arms; USNM E45150 , 1 km WNW Onna Village (Horseshoe Cliffs), Okinawa Island , Ryukyu Islands , 26º30′ 00″N 127º50′54″E, 64.05 m, Coll . R.F. Bolland, 20 May 1985, 1 dry spec ., R =3.2 (longest) r=0.2, 9 arms; USNM E45173 , 1 km WNW Onna Village (Horseshoe Cliffs), Okinawa Island , Ryukyu Islands , 26º30′ 00″N 127º50′54″E, 64.05 m, Coll . R.F. Bolland, 1 dry spec ., R =2.6 r=0.2, 6 arms; USNM E45724 , 1 km WNW Onna Village (Horseshoe Cliffs), Okinawa Island , Ryukyu Islands , 26º30′ 00″N 127º50′54″E, 54.9 m, Coll . R.F. Bolland, 10 Nov 1984, 1 dry spec ., R =2.2 r=0.2, 7 arms.

Philippines. CASIZ 207247 , South Pinnacle site, Verde Island, Batangas Philippines , 13.53235°N, 121.103267°E, 98–112 m, Coll. E. Jessup, 12 April 2015.1 wet spec ., R =1.7, r=0.4, 8 arms; CASIZ 207251 , South Pinnacle site, Verde Island, Batangas Philippines , 13.53318°N, 121.103267°E, 80 m, Coll. E. Jessup, 13 April 2015 1 wet spec ., R =2.2, r=0.4, 8 arms; CASIZ 207291 , Blackfish site, Verde Island, Batangas Philippines , 13.57548°N, 121.04175°E, 94 m, Coll. L. Rocha, 1 wet spec ., R =2.6, r=0.4, 8 arms.

South Pacific. IE-2013-5641 New Hebrides Arc 22°18′ 48.0024″ S; 168° 40′ 54.0156″ E, 195–250 m, Coll. VOLSMAR DW 41, 8/6/89, 1 wet spec ., R =4.1, r=0.3; IE-2007-6375 New Caledonia, 22° 18′ 47.9988″ S; 168° 41’ 12.0012’’ E, 340–345 m, Coll. EXBODI, DW 3855 14 September 2011, 2 wet specs , R =4.3, r=0.5, 6 arms, R =3.7, r=0.3 disarticulated; IE-2013-6776 , Noumea, New Caledonia, 22º14.9′S, 166º16.4′E, 28 m, Coll. Richer de Forges , VAUBAN ORSTOM St. 47, 1 dry spec ., R =~5.3, r=0.6, 7 arms); IE-2013-6777 , Southwest coast, New Caledonia, Coll. M. Jangoux 1984, 2 dry specs ., R = 1.7, r=0.3, R =~2.2, r=0.2; IE-2013-6778 , Vanuatu, 15º38′S 167º04′E, 140–175 m, Coll. MUSORSTOM 8, St. CP 1131, 5 wet specs ., R =3.1 r=0.5, R =1.2 r=0.3, R =2.5 r=0.3, R =2.1 r=0.2, 7 arms, R =1.4 (longest), r=0.2, 5 arms (fissiparous).