Hemiphylactella, Vigneaux, 1949
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publication ID |
https://doi.org/ 10.5252/g2017n4a7 |
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publication LSID |
urn:lsid:zoobank.org:pub:4A8E78AE-A740-4537-BD3C-DF0AA18359CE |
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persistent identifier |
https://treatment.plazi.org/id/03DE3234-FFE9-C622-FF19-FC8A5B90D799 |
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treatment provided by |
Felipe |
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scientific name |
Hemiphylactella |
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Hemiphylactella View in CoL ? latebrosa Vigneaux, 1949 ( Fig. 3 View FIG )
MATERIAL EXAMINED. — Figured syntype ( Vigneaux 1949: 85, pl. 8, fig. 3), C.B.451. This specimen is here designated as the lectotype of the species.
TYPE LOCALITY. — Salles, Gironde, Aquitaine, France.
AGE. — Serravallian, middle Miocene.
DESCRIPTION
Colony encrusting, multiserial, unilaminar ( Fig. 3A View FIG ). Putative ancestrula similar to later autozooids but smaller, about 280 µm long by 180 µm wide, budding two zooids laterally ( Fig. 3A View FIG ). Later zooids arranged quincuncially, distinct, boundaries marked by narrow furrows, rounded polygonal, longer than broad (mean L/W = 1.26). Frontal shield slightly convex, smooth, imperforate except for an occasionally visible single row of marginal areolar pores, transversely oval to circular, 15-20 µm long ( Fig. 3A, B View FIG ). Orifice placed distally, longer than broad, about 120 µm long by 95 µm wide, seemingly key-hole shaped (cleithridiate) with a concave proximal edge ( Fig. 3C View FIG ). A slightly raised, tubular peristome surrounds the orifice proximally and laterally ( Fig. 3C View FIG ); oral spine bases absent. Ovicells hyperstomial. Ooecium broader than long, globular, cap-like, smooth like the frontal shield ( Fig. 3B, C View FIG ). Avicularia absent. Pore-chamber windows not observed.
MEASUREMENTS
ZL 453 ± 33, 412-504 (10); ZW 360 ± 24, 306-399 (10); OvL 73 ± 10, 65-84 (3); OvW 189 ± 10, 178-198 (3).
REMARKS
Hemiphylactella ? latebrosa differs from H. pulchra , the type species of the genus, in lacking oral spine bases and porechamber windows, for which reason we assign this species only tentatively to Hemiphylactella . Furthermore, H.? latebrosa has a smooth frontal shield while in H. pulchra the frontal shield is coarsely granular. The two species possess ovicells of similar shape and size, whereas the ovicell in H.? crassovicellata is much larger than in the other two species. Hemiphylactella ? crassovicellata also has a finely granular frontal shield
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.