Neoferdina offreti ( Koehler 1910 )

Mah, Christopher L., Kogure, Yoichi, Fujita, Toshihiko & Higashiji, Takuo, 2024, New Taxa and Occurrences of Mesophotic and Deep-sea Goniasteridae (Valvatida, Asteroidea) from Okinawa and adjacent regions, Zootaxa 5403 (1), pp. 1-41 : 31-32

Neoferdina offreti ( Koehler 1910)

FIGURE 12A–C

Ferdina Koehler 1910: 143 (part); Fisher 1919: 371; H.L. Clark 1921: 58; A.H. Clark 1954: 255 Neoferdina intermedia Djakonov 1930: 248 , pl.13, fig. 6; Livingstone 1936: 385

Neoferdina offreti Livingstone 1931: 307 ; A.H. Clark 1954: 255; 1967: 191; Clark & Rowe 1971: 65 (in key); Jangoux 1973: 778; Marsh 1977: 263; Jangoux & Aziz 1984: 867; Mooseleitner 1990: 327; Chao 1999: 413; Rowe & Richmond 2004: 3285; Conand et al. 2016: 54, 56; Mah 2017: 58.

Neoferdina mahei Jangoux 1973: 784 .

Diagnosis

Body stellate (R/r=3.5–5.5), arms elongate, triangular, interradial arcs weakly curved ( Fig. 12A–C ). Bald, abactinal plates present; large convex, abactinal plates present irregularly on disk but particularly in transverse series across the arm ( Fig. 12A, C ), these are large, approximately 1–2X the size of adjacent plates, which are variably bald or covered by granules. Transverse plate series present between superomarginal contact. Superomarginal plates, all circular to quadrate with a large, bald patch, in regular, homogeneous series ( Fig. 12C ).

Comments

A widely occurring species that shows considerable morphological variation across its range.The character differences between this species and the widespread Neoferdina cumingi are also increasingly tenuous ( Mah 2017).

Occurrence

Japan (Okinawa), 0– 75 m.

Outside Japan. New Caledonia, southwest Pacific Ocean, Andaman Islands, Seychelles, Mascarenes, Maldives, Comoro Islands, Scattered Islands ( Mozambique Channel, Indian Ocean). 0–66 m

Material Examined

USNM E40468 1 km WNW of Onna Village, Horseshoe Cliffs , Okinawa, Ryukyu Islands, 26.5 127.848, 0–61 m. Coll. R.F. Bolland, 25 March 1984. 1 wet spec. R=2.2 r=0.8.

USNM E40469 1.3 km ENE of Maeiki-Zaki, Seragaki Beach , Okinawa, Ryukyu Islands, 26.5067 127.877, 0–43 m. Coll. R.F. Bolland, 6 June 1984. 1 wet spec. R=2.4 r=0.7.

USNM E45957 1.3 km ENE of Maeiki-Zaki, Seragaki Beach , Okinawa, Ryukyu Islands, 26.5067 127.877, 46 m. Coll. R.F. Bolland, 25 Oct 1984, 1 wet spec. R=2.7 r=0.8

USNM E45958 1 km WNW of Onna Village, Horseshoe Cliffs , Okinawa, Ryukyu Islands, 26.5 127.848, 55 m. Coll. R.F. Bolland, 10 April 1981. 1 wet spec. R=2.7 r=0.9.

USNM E45959 1 km WNW of Onna Village, Horseshoe Cliffs , Okinawa, Ryukyu Islands, 26.5 127.848, 64–67 m. Coll. R.F. Bolland, 23 Dec. 1981. 1 wet spec. R=1.6 r=0.6.

USNM E45960 1 km WNW of Onna Village, Horseshoe Cliffs , Okinawa, Ryukyu Islands, 26.5 127.848, 55 m. Coll. R.F. Bolland, 11 April 1981. 1 wet spec. R=2.0 r=0.6.

USNM E45961 1 km WNW of Onna Village, Horseshoe Cliffs , reef edge, Okinawa, Ryukyu Islands, 26.5 127.848, 67 m. Coll. R.F. Bolland, 10 Aug1984. 2 wet specs. R=3.2 r=0.9 R=3.7 r=1.2.

USNM E45965 1 km WNW of Onna Village, Horseshoe Cliffs , Okinawa, Ryukyu Islands, 26.5 127.848, 70–75 m. Coll. R.F. Bolland, 11 May 1986. 1 dry spec. R=2.5 r=0.9

USNM E45966 1 km WNW of Onna Village, Horseshoe Cliffs , Okinawa, Ryukyu Islands, 26.5 127.848, 52 m. Coll. R.F. Bolland, 27 July1987.1 dry spec. R=1.3 r=0.4

USNM E46043 1 km WNW of Onna Village, Horseshoe Cliffs , from side, under rocks, Okinawa, Ryukyu Islands, 26.5 127.848, 49.0 m. Coll. R.F. Bolland, 26 Nov 1987. 1 wet spec. R=2.7 r=0.7.

Figures

FIGURE 12. Neoferdina offreti (Ferdininae) USNM E40468 A. Abactinal view. B. Actinal view. C. Lateral view showing marginal plates. Scale bars A–B=3.0 mm, C=2.0 mm.