Cinclidia aculeata Denisenko 2018, n. sp.
Cinclidia aculeata n. sp. (Fig. 2; Table 1) Material examined. Holotype: ZMUC-BRY-115, one colony on rock, Stn 604, 61°35’34’’ N, 5°05’36’’ W, 260 m, 12 April 1990, collected by heavy triangular dredge. BIOFAR program, RV Magnus Heinason, Faroese Fishery Investigations. Distribution. East and south...
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| Format: | Other/Unknown Material |
| Language: | unknown |
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2018
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| Online Access: | https://zenodo.org/record/6490325 https://doi.org/10.5281/zenodo.6490325 |
| Summary: | Cinclidia aculeata n. sp. (Fig. 2; Table 1) Material examined. Holotype: ZMUC-BRY-115, one colony on rock, Stn 604, 61°35’34’’ N, 5°05’36’’ W, 260 m, 12 April 1990, collected by heavy triangular dredge. BIOFAR program, RV Magnus Heinason, Faroese Fishery Investigations. Distribution. East and south off the Faroe Islands archipelago, slope and outer part of the shelf. Etymology. Latin aculeata, spiny. Description. Colony small, irregular in outline, multiserial, unilaminar, white when non-bleached. AutoZooids mostly oval, slightly convex, with distinct boundaries marked by deep grooves and, sometimes, interZooidal kenoZooids (Fig. 2a‒c). Intramural reparative budding fairly common. Lateral gymnocyst narrow; proximal gymnocyst more extensive, often forming narrow extension(s) between proximolateral neighboring Zooids. Frontal spinocystal shield thin, flat, with narrow radiating costae (10‒14 pairs), lacking bifurcations. Costae separated by 4‒6 oval or round intercostal foramina, decreasing in siZe towards shield centre (Fig. 2b). Each costa bearing 2‒3 short tubular spines, each with a tiny apical pore (pelmatidium), their height decreasing towards midline of shield. In older part of colony, costae becoming wider and thicker, with intercostal foramina smaller and pelmatidia less visible or occluded (Fig. 2d). Orifice broader than long, transversely D-shaped, bounded distally and laterally by thin, low peristome terminating as small condyles visible beneath operculum; proximal edge of orifice formed by thickened peristomial (apertural) bar formed by more robust, thicker distalmost costal pair; bar with four (two on each costa) short spines with pelmatidia (Fig. 2c‒d). Four articulated oral spines distal and lateral to peristome; distalmost pair thinner than lateral pair. Spine tips initially simple, becoming bifurcate (Fig. 2c‒d); only lateral bifurcate spine visible in ovicellate Zooids. InterZooidal kenoZooids present (Fig. 2c). No avicularia. Ovicells terminal, prominent, cleithral (Fig. 2c, f). Ooecium ... |
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