Cribellopora connata ( Ortmann, 1890 )

Arakawa, Shinji, 2024, Descriptions of Three Cheilostomatid Bryozoan Species from the Continental Shelf off Boso Peninsula, Japan, Species Diversity 29 (1), pp. 99-110 : 102

publication ID	https://doi.org/ 10.12782/specdiv.29.99
publication LSID	lsid:zoobank.org:pub:EA59EB18-8759-401A-96E0-62C2E9896A94
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treatment provided by	Felipe
scientific name	Cribellopora connata ( Ortmann, 1890 )
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Treatment

Cribellopora connata ( Ortmann, 1890)

( Figs 3B–F View Fig , 4A, B View Fig )

Hippothoa connata Ortmann, 1890: 52 , pl. 4, fig. 7.

Cribellopora connata : Arakawa 1999: 78, pl. 9, fig. F; Arakawa 2020b: 55.

Rogicka connata : Hirose 2010: 113, pl. 193, figs A–F.

Material examined. NMNS PA 20501 (uncoated colony on molluscan shell), 20502 [colony on molluscan shell, with Micropora plana Arakawa, 2016 ( NMNS PA 16836) and Monoporella projecta Arakawa, 2020 ( NMNS PA 18452)], 20503 (single zooids A–C), Station 1734, R / V Hakurei-Maru cruise GH-80-2. NMNS PA 20504 (a single ovicellate zooid), 20505 (single zooids A, B), Station 1746, R / V Hakurei-Maru cruise GH-80-2.

Measurements (in mm). NMNS PA 20501, 20503– 20505. Autozooids (12, 7): ZL, 1.03–1.18 (1.096 ±0.051); ZW, 0.71–0.84 (0.791 ± 0.047); OrL, 0.13–0.18 (0.153 ± 0.016); OrW, 0.17–0.21 (0.182 ± 0.015).

Description. Colony encrusting, uniserial ( Fig. 3B, C View Fig ). Zooids oval, with communication pores at proximal and distal ends, and two or three on each side ( Fig. 4B View Fig ). Frontal shield much inflated, uniformly covered with small cribellate pseudopores; median imperforate area lacking. Orifice raised somewhat above frontal shield, semicircular, with rounded-v-shaped sinus and thick, grooved condyles ( Fig. 3E, F View Fig ); larger in ovicellate than non-ovicellate autozooids ( Fig. 4A View Fig ). Four stout oral spines present. Avicularia lacking. Ovicell globular, wider than long (0.403 mm long, 0.497 mm wide); ooecium completely covered with cribellate pseudopores ( Fig. 4A View Fig ). Ancestrula occluded with kenozooidal calcification (regenerated); a pair of daughter zooids budded ( Fig. 3D View Fig ).

Distribution. Sagami Bay, depth 370 m ( Ortmann 1890); Fukuura, western Sagami Bay, depth 150 m ( Hirose 2010); east of Boso Peninsula, depths 154 and 155 m (this study).

Remarks. The specimens from Sagami Bay ( Ortmann 1890; Hirose 2010) have three oral spines, but this may represent intraspecific variation, because all other characters are as in my material. Although Hirose (2010) placed this species in Rogicka Uttley and Bullivant, 1972 , based on the cribellate pseudopores and the presence of oral spines, these characters are also observed in Cribellopora . Rogicka differs from Cribellopora in having numerous close-set spines ( Gordon 1984).

Among Recent species of Cribellopora , C. siri Gordon, 1989 from New Zealand and C. constellata Winston, 2005 from Florida resemble C. connata in the small frontal pseudopores. However, the former has an imperforate ovicell with small marginal pores, and the latter has stellate (not cribellate) pseudopores and an imperforate ovicell ( Table 1). Ovicells evenly perforated by pseudopores as in C. connata have been illustrated for C. trichotoma by Cook (1985), “ Schizoporella trichotoma ” by Osburn (1952), and Schizoporella pulchra Neviani, 1895 (see Cook 1968).

Hirose (2010) reported another Cribellopora from Sagami Bay as C. trichotoma , based on the description of that species from New Zealand by Gordon (1984). Hirose’s comparison is correct, but Gordon (1989) revised that species to C. divisopora ( Waters, 1887) , thus extending the known distribution of C. divisopora to Japan.