Cigclisula cautium , A. B. Hastings 1932
Creators: name: Almeida, Ana C. S.
name: Souza, Facelucia B. C.
name: Menegola, Carla M. S.
name: Sanner, Joann
name: Vieira, Leandro M.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Bryozoa
Gymnolaemata
Cheilostomatida
Colatooeciidae
Cigclisula
Cigclisula cautium

description: Cigclisula cautium Hastings, 1932
(Figs 7–8, Table 2)
Porella areolata: Livingstone 1926: 92 (in part, erect specimens), pl. 8, figs 2–4. [Great Barrier Reef, Australia; Japan] Cigclisula cautium Hastings, 1932: 435, text-fig. 13A–C. [Great Barrier Reef, Australia]
Material examined. Holotype: NHMUK 1932.4.20.54 (one dry and two balsam slides), Cigclisula cautium, A.B. Hastings det., Great Barrier Reef Expedition, Station XIV, 0.5 n. mile (0.9 km) SE of Lizard Island, Queensland, Australia, 35 m. Paratype: USNM 9574, Cigclisula cautium, A. B. Hastings det., 1932, Great Barrier Reef Expedition, Station XIV, 0.5 n. mile (0.9 km) SE of Lizard Island, Queensland, Australia, 35 m.
Description. Colony erect, bilaminar, branching. Zooids hexagonal, longer than wide, delimited by slightly raised lateral walls. Frontal shield heavily calcified, with small protuberances, uniformly punctured by 14–24 pseudopores. Primary orifice small relative to frontal shield, subelliptical, as long as wide, sunken, with archshaped anter and concave poster, separated by 2 proximolateral down-curved condyles. Secondary orifice raised, non-tubercular, subcircular. Suboral avicularium elliptical, laterally placed, distally directed. Frontal avicularia small, elliptical, 1–2 per zooid, placed at zooidal margins. Interzooidal avicularia longer than wide; rostrum spatulate with rounded proximal edge, median constriction distinct and distal edge concave; calcified palate occupying more than half of the rostrum length, with oval foramen. Ooecium subglobose, slightly prominent; ectooecium with longitudinal band of 6–7 irregular pseudopores.
Remarks. Cigclisula cautium is characterized by a frontal shield with small protuberances, interzooidal avicularia with a spatulate rostrum and oval opesia, and ectooecium with a longitudinal band of 6–7 irregular pseudopores.
Cigclisula cautium resembles C. occlusa, C. fissurata and C. fruticosa in having erect, bilaminar colonies. It differs from C. occlusa in zooid size (longer in C. cautium), a suboral avicularium of only one size (two distinct sizes in C. occlusa) and the number of ectooecial pseudopores (6–7 in C. cautium, 11–29 in C. occlusa). Cigclisula fissurata differs in the distribution of frontal pseudopores (uniform in C. cautium, marginal in C. fissurata), interzooidal and frontal avicularia (present in C. cautium, absent in C. fissurata) and number of ectooecial pseudopores (6–7 in C. cautium, 2–5 in C. fissurata). Cigclisula fruticosa differs in the distribution of frontal pseudopores (uniform in C. cautium, irregular in C. fruticosa), orifice shape (subelliptical primary orifice and nontubercular secondary orifice of C. cautium) and the number of ectooecial pseudopores, about 6 in C. fruticosa.
Distribution. Pacific: Australia (Queensland) and Japan (Tsushima Island; see Hastings 1932).
description: Published as part of Almeida, Ana C. S., Souza, Facelucia B. C., Menegola, Carla M. S., Sanner, Joann & Vieira, Leandro M., 2014, Taxonomic review of the family Colatooeciidae Winston, 2005 (Bryozoa, Cheilostomata), with description of seven new species, pp. 1-61 in Zootaxa 3868 (1) on pages 15-17, DOI: 10.11646/zootaxa.3868.1.1, http://zenodo.org/record/4930657