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Figure 3 | Frontiers in Zoology

Figure 3

From: Overcoming the fragility – X-ray computed micro-tomography elucidates brachiopod endoskeletons

Figure 3

Rectocalathis schemmgregoryi n. gen., n. sp. (Chlidonophoridae) – ZMB Bra 2254. Ventral valve = top & dorsal valve = bottom. Click here to download a 3D model of R. schemmgregoryi n. gen., n. sp. (interactive PDF). A) Left: Outside of the dorsal valve. Right: Inside of dorsal valve without the lophophoral endoskeleton. Shell with faint depression posteriorly of the center where the dorsal mantle spiculation is located. Crura purple. B) Left: Outside of the ventral valve. Right: Inside of ventral valve. C) Inside of the dorsal valve with lophophoral endoskeleton and spicules of the tentacles. D) Left: Ventral view of lophophoral endoskeleton, showing spiculated tentacles and heavy spiculation inside the loops. Posteriorly of the mouth, two symmetrical extensions project towards the crural processes. Right: Ventral view of “strongly purged” lophophoral endoskeleton to visualize the geometrical nature. Strongest speculation in the centre of the lophophore, spreading out from anterior of the mouth, to support the lophophoral arms, their strongest spiculation at the base of the tentacles. E) Left: Anterior view of whole specimen. Middle: Lateral view of whole specimen. Right: Posterior view of whole specimen. F) Left: Anterior view through transparent shell. Middle: Lateral view through transparent shell, Right: Posterior view through transparent shell. G) Left: Lateral view through transparent shell. Spicules of the dorsal body wall (white) are visible due to transparency of the lophophoral endoskeleton (arrow). Right: Magnification of median spicules of the dorsal body wall. 1) lateral view, 2) anterior view.

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