Notaulax
Notaulax sp. 3 (Fig. 17) Material examined. Queensland, Lizard Island: AM W. 30381, east lagoon near Bird Island, 14 ° 42 ′S, 145 ° 30 ′E coral rubble, 10 m, 31 Oct 2005; AM W. 31848 (2), between First beach and Osprey Island, 14 ° 42 ′S, 145 ° 30 ′E, 2 m, 26 Oct 2005; AM W. 41373 (crown), 14 ° 38 ′...
| Main Authors: | , |
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| Format: | Other/Unknown Material |
| Language: | unknown |
| Published: |
2015
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| Online Access: | https://zenodo.org/record/5064512 https://doi.org/10.5281/zenodo.5064512 |
| Summary: | Notaulax sp. 3 (Fig. 17) Material examined. Queensland, Lizard Island: AM W. 30381, east lagoon near Bird Island, 14 ° 42 ′S, 145 ° 30 ′E coral rubble, 10 m, 31 Oct 2005; AM W. 31848 (2), between First beach and Osprey Island, 14 ° 42 ′S, 145 ° 30 ′E, 2 m, 26 Oct 2005; AM W. 41373 (crown), 14 ° 38 ′ 51 ′′S, 145 ° 29 ′ 16 ′′E, 7–12 m, 3 Sep 2010; AM W. 197044 (2), lagoon, 14 ° 40 ′S, 145 ° 27 ′E, dead coral rock, 12 m, Apr 1978; AM W. 43939, MI QLD 2360; AM W. 47341, MI QLD 2419. Description of material examined. Largest complete specimen (in 3 pieces) ~ 31 mm long (crown 9 mm), and 2.8 mm wide. Specimens with 8–26 thoracic and numerous abdominal chaetigers. Live specimens with basal lobes of radiolar crown with one dark spot on each side. Radioles with several irregular thin dark bands and paired black spots distally on each radiole (Fig. 17 A–B). Thorax darkly pigmented and with a white patch on collar midventrally (Fig. 17 C). The number of pigmented segments (1–7) varies among specimens. Abdomen white except for a midventral brownish line more evident in some specimens towards the posterior end. Preserved specimens maintain most of crown pigmentation pattern. Radiolar crown with semicircular thick, stout, elongate branchial lobes (Fig. 17 A). Dorsal and ventral basal flanges along the branchial lobes. Basal membrane between radioles, along 1 / 3 of their length; radioles with narrow distal radiolar flanges, bare tips of medium length (as long as the length on one pinnule). Four rows of vacuolated cells supporting radiolar basally. Around 20 radiolar ocelli in teardrop-shaped groups on lateral margins of radioles, above the basal membrane, for the length of 5–6 pinnular basal insertions (Fig. 17 B). Radioles supported by four rows of vacuolated cells at the base. Dorsal lips long. Posterior peristomial collar with dorsal margins with a dorsal notch and a ventral lobe separated by a short midventral incision. Thoracic ventral shields in contact with neuropodial tori (Fig. 17 C). Collar chaetae spine-like, ... |
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