Diagnosis
provided by World Register of Marine Species
Atelecrinidae with centrodorsal hollow and thin-walled, separated at least interradially from basal ring by ligament-filled gap; central cavity diameter >0.6 times basal diameter; adoral rim of centrodorsal with 5 hollow, interradial buttresses that open adorally as deep, ring-shaped pits. Cirrus sockets in 10 or 15 columns with fulcral tubercles similar to those of Atelecrinus and Adelatelecrinus but often more strongly developed, producing strongly serrated centrodorsal profile; cirri (when known) with weak opposing spine and curved claw, of up to 45 cirrals, 94 mm long (possibly also tapering to point with no opposing spine). Externally visible portion of each basal a shallow chevron (=inverted V-shape) to almost straight, swollen interradially or not; ends contiguous midradially, often rounded. Aboral surface of basals with spoon-shaped articulation in central depression flanked by pair of small fossae, and with adorally curved and distally expanded pair of interior projections. Radial cavity apparently lacking delicate aboral calcareous deposit. Most proximal pinnule usually on IIbr17 (rarely IIbr12–20).
5. Allan, D. (2000)
A photographic guide to birds of prey of Southern, Central and East Africa. Struik Publishers, Cape Town.
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