Luidia Forbes, 1839

Pourvali, Naser, Aliabadi, Mohammad-Ali Salari, Salamat, Negin, Hesni, Majid Askari, Ranjbar, Mohammad Sharif, Carter, Hugh & Price, Andrew. R. G., 2025, Systematics, distribution and ecology of sea stars (Echinodermata: Asteroidea) from Iranian waters of the Persian Gulf and a revised identification key, Zootaxa 5647 (3), pp. 201-234 : 206

Genus Luidia Forbes, 1839

Type: Luidia fragilissima Forbes, 1839 , a synonym of Asterias ciliaris Philippi, 1837 , by monotypy

Diagnosis: Arms 5–11, elongate and gently tapering, lower surface almost flat. Abactinal plates highly paxilliform, the two most lateral series at least forming regular longitudinal rows. Supero-marginal plates much smaller than infero-marginal plates, often difficult to distinguish from similar sized adjacent lateral paxillae (expect in East Pacific subgenus Platasterias ). Infero-marginals large and prominent, each bearing several long spines. Interradial areas small, adambulacral plates broad and bandlike, bearing 2–4 large spines. The inner-most (furrow) spine compressed, curved and sabre-like. Tube feet tapering to knob-like tip and lacking terminal suckers. Modified from Clark & Downey (1992).