Antropora minor (Hincks, 1880)
Judith L Winston, 2016, Bryozoa of Floridan Oculina reefs, Zootaxa 4071 (1), pp. 1-81 : 20-21
publication ID |
https://doi.org/ 10.11646/zootaxa.4071.1.1 |
publication LSID |
lsid:zoobank.org:pub:D47C792F-E91D-40A6-ABB7-FA7810578562 |
DOI |
https://doi.org/10.5281/zenodo.6084722 |
persistent identifier |
https://treatment.plazi.org/id/19362D2E-2006-FFA4-BBA5-F9BCFC37FCE1 |
treatment provided by |
Plazi |
scientific name |
Antropora minor (Hincks, 1880) |
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Antropora minor (Hincks, 1880) View in CoL
( Fig. 10 View FIGURE 10 ; Table 9 View TABLE 9 )
Membranipora trifolium var. minor Hincks, 1880: 87 , pl. 9, fig. 6.
Membrendoecium parvus Canu & Bassler, 1928a: 61 , pl. 1, figs 1–2.
Membrendoecium minus: Marcus 1937: 50 , pl. 9, fig. 22A, B.
Antropora minor: Tilbrook 1998: 34 , fig. 2A–F; Vieira et al. 2008: 14; Winston et al. 2014: 151, fig. 7.
Material examined. VMNH no. 70609, 70610; USNM no. 1283235.
Description. Colonies encrusting, unilamellar, on calcareous substrata ( Fig. 10 View FIGURE 10 A). Zooids oval to subtriangular, broader proximally. Frontal membrane underlain by beaded cryptocyst and rimmed by proximally elongated gymnocyst ( Fig. 10 View FIGURE 10 B). Cryptocystal shelf also broader proximally, gradually narrowing to distal wall around half-moon shaped operculum and forming oval to bell-shaped opesia. Interzooidal avicularia interspersed between autozooids, each with circular foramen, granular cryptocyst and well-developed gymnocyst that may have a small tubercle ( Fig. 10 View FIGURE 10 B, C); mandible U-shaped, rostral rim well calcified. Brooding zooids show thickened lunate rim of calcification distally.
`Remarks. The most unusual feature of this species is its ability to calcify over the frontal membrane and opesia of many zooids in a colony ( Fig. 10 View FIGURE 10 E, F). In some zooids a small central opening may remain. In others the entire frontal surface is covered by concentric rings of calcification. These ‘closure plates’ may be a way to protect zooids from predation (colonies on Oculina showed a considerable amount of damage and repair), or a means to preserve nutritive resources in a food-scarce habitat.
Distribution. Oculina banks, Atlantic coast of Florida, Brazil.
Lz | Wz | Lo | Wo | Lcircz | Wcircz | |
---|---|---|---|---|---|---|
N | 18 | 18 | 18 | 18 | 18 | 18 |
Mean | 0.381 | 0.251 | 0.041 | 0.061 | 0.257 | 0.211 |
SD | 0.040 | 0.024 | 0.007 | 0.008 | 0.037 | 0.025 |
Min | 0.324 | 0.216 | 0.036 | 0.054 | 0.216 | 0.162 |
Max | 0.450 | 0.306 | 0.054 | 0.072 | 0.324 | 0.252 |
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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