Plesiocleidochasma cleidostomum (Smitt, 1873) Smitt, 1873
Judith L Winston, 2016, Bryozoa of Floridan Oculina reefs, Zootaxa 4071 (1), pp. 1-81 : 63
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.6084844 |
persistent identifier |
https://treatment.plazi.org/id/19362D2E-202B-FF8E-BBA5-FE6BFC5AF8BD |
treatment provided by |
Plazi |
scientific name |
Plesiocleidochasma cleidostomum (Smitt, 1873) |
status |
comb. nov. |
Plesiocleidochasma cleidostomum (Smitt, 1873) View in CoL comb. nov.
( Fig. 35 View FIGURE 35 ; Table 34 View TABLE 34 )
Lepralia cleidostoma Smitt, 1873: 62 , pl. 11, figs 217–219.
Lepralia porcellana: Osburn 1914: 209 .
Hippoporina cleidostoma: Canu & Bassler 1928a: 104 , pl. 9, fig. 7, pl. 32, fig. 6, text-fig. 18.
Hippoporina porcellana: Osburn 1940: 428 ; Shier 1964: 633.
Cleidochasma porcellanum: Cheetham & Sandberg 1964: 1032 , text-fig. 35; Long & Rucker 1970: 19, fig. 4.2; Winston 1982: 147, fig. 80.
Schedocleidochasma porcellanum: Winston 2005: 87 , figs 244–246.
Material examined. MCZ # 90, syntype of Lepralia cleidostoma , May 1, 1868, Cast No. 7, 26 fms [off Sombrero Key], L. Pourtales; VMNH no. 70652, 70653, 70654; USNM no. 1283259.
Description. Colonies encrusting, in unilaminar patches to multilaminar mounds. Primary layer of zooids regularly hexagonal; frontally budded zooids irregularly polygonal. Frontal shield smooth to sparsely granular, flat over most of frontal surface ( Fig. 35 View FIGURE 35 B), raised around orifice, imperforate except for a few marginal pores. Orifice cleithridiate, rounded distally with proximally directed condyles, and narrow U-shaped sinus. Single or paired adventitious avicularia may occur on umbo proximolateral to orifice; rostra and mandibles acutely triangular ( Fig. 35 View FIGURE 35 C). Ovicell hyperstomial, prominent and delicately striated when newly formed, becoming granular and embedded in secondary calcification with age; imperforate, with frontal area in form of a thin curved-edged plate (labellum) between two lateral slits, leaving narrowly transverse opening ( Fig. 35 View FIGURE 35 A, B). Embryos reddish-pink.
Discussion. Floridan Plesiocleidochasma cleidostomum is part of the ‘ Cleidochasma porcellanum ’ species complex, widely distributed in tropical and subtropical habitats, including the Western Atlantic (see Winston 2005).
Soule, Soule & Chaney (1991) and Cook & Bock (1996) revised the genera and species included in the Cleidochasmatidae . Winston (2005) placed Smitt’s species in Schedocleidochasma , but Berning (2012) recently synonymized Schedocleidochasma under Plesiocleidochasma , a decision followed here.
Distribution. Cape Hatteras to Florida, Caribbean, and Gulf of Mexico.
Lz | Wz | Lo | Wo | Lov | Wov | Lav | Wav | |
---|---|---|---|---|---|---|---|---|
N | 18 | 18 | 18 | 18 | 12 | 12 | 1 | 1 |
Mean | 0.428 | 0.321 | 0.124 | 0.095 | 0.182 | 0.240 | 0.126 | 0.054 |
SD | 0.043 | 0.031 | 0.009 | 0.011 | 0.021 | 0.019 | ------ | ------ |
Min | 0.360 | 0.288 | 0.108 | 0.081 | 0.144 | 0.148 | 0.126 | 0.054 |
Max | 0.522 | 0.396 | 0.144 | 0.126 | 0.216 | 0.270 | 0.126 | 0.054 |
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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