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Synoptic Keys to the Genera of Ophiuroidea

Family Ophioleucidae Matsumoto, 1915

Family Ophioleucidae Matsumoto, 1915

1 (4)

Single tentacle scale throughout arm.

2 (3)

Dorsal arm-plates rudimentary. . . . Ophiotrochus Lyman, 1878.

*panniculus Lyman, 1878. New Guinea. 1,000 fms.

3 (2)

Dorsal arm-plates well developed and broadly contiguous: disc granulated: ventral arm-plates large and entire. . . . Ophiopallas Koehler, 1904.

*paradoxa Koehler, 1904. Indonesia. 200 fms.

4 (1)

More than 1 tentacle scale, at least in basal part of arm.

5 (8)

Two tentacle scales throughout arm.

6 (7)

Disc granulated. . . . Ophiopyren Lyman, 1878.

*longispinus Lyman, 1878. Caribbean. 100–600 fms.

7 (6)

Central part of disc covered by skin, with scales and radial shields forming the periphery. . . . Ophiernus Lyman, 1878.

*vallincola Lym., 1878. Crozet Is. 1,400 fms.

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8 (5)

Basal tentacle-pores with several scales.

8a (11)

Basal (first to third) tentacle-pores with several marginal scales, but succeeding pores with only 1 scale to each. Disc granulated.

9 (10)

Peripheral granules of disc modified into papillae which continue round the borders of the radial shields, and some other plates. . . . Ophioleuce Koehler, 1904.

*seminudum Koehler, 1904. Indonesia. 800 fms.

10 (9)

Granules of disc not specialized and not arranged in rows around the borders of disc plates. . . . Ophiocirce Koehler, 1904.

*inutilis Koehler, 1904. Indonesia. 60 fms.

11 (8a)

Tentacle-pores with 6 scales, dwindling to 3 or 4 scales at the distal extremity of the arm. . . . Ophioperla Koehler, 1912.

*Ophiura koehleri Bell, 1908 = Ophioperla ludwigi Koehler, 1912. Antarctica, 40–250 fms.

See Mortensen (1936, p. 311) for discussion of type and nomenclature.