Rhynchozoon latiavicularium Dick & Ngai & Doan 2020, n. sp.
In: Taxonomy and diversity of coelobite bryozoans from drift coral cobbles on Co To Island, northern Vietnam, pp. 201-252 in Zootaxa 4747(2) 237-239, 2020
unknown
Zugriff:
Rhynchozoon latiavicularium n. sp. (Fig. 17) urn:lsid:zoobank.org:act: D543ACD0-6CEA-46F5-8624-F9FD808E0A37 Etymology. The specific name combines the Latin word lata (wide) with avicularium, referring to the relatively wide frontal avicularia. Material examined. Holotype, VNMN-0264 (CT-14); paratypes, VNMN-0265 (CT-4), VNMN-0266 (CT-25), VNMN-0267 (CT-34), all on SEM stubs. Measurements. AzL, 0.45–0.63 (0.536 ± 0.062); AzW, 0.30–0.54 (0.399 ± 0.056); OrL, 0.10–0.14 (0.121 ± 0.010); OrW, 0.10–0.12 (0.106 ± 0.006) (n = 15, 2). OvL, 0.14–0.21 (0.173 ± 0.023); OvW, 0.19–0.23 (0.208 ± 0.013) (n = 15, 1). Frontal AvRL, 0.14–0.18 (0.157 ± 0.014); frontal AvRW, 0.066 –0.102 (0.080 ± 0.008) (n = 30, 2). Diagnosis. Suboral sinus U-shaped, moderately shallow, narrow, flanked by straight orificial margin and broad, semicircular condyles. Oral denticles indistinct. Oral spines lacking. Zooids with suboral avicularium and single frontal avicularium. Suboral avicularium relatively broad; uncinus scarcely evident. Frontal avicularia relatively short, broad; weakly diamond shaped or semicircular proximally; scarcely decurved, with triangular mandibular portion lacking setiform end; paired crossbar elements V-shaped. Ooecium with transversely oval endooecial panel in peristome; labellum present but not markedly broad. Cylindrical projections around secondary orifice in older parts of colony. Description. Colony encrusting, sheet-like, initially unilaminar, developing bilaminar zones due to frontal budding, but not nodular. Zooids irregularly hexagonal but boundaries distinct only at colony margin. Frontal wall at margin smooth, convex, imperforate, with 7–10 small, circular areolae along each lateral margin; with thickening frontal calcification, areolar openings become larger and fewer, five or six along each lateral margin. Primary orifice with anter D-shaped or nearly circular; median sinus variable, ranging from narrowly U-shaped to more broadly rounded-V-shaped, flanked on each side by small shelf, with rounded condyle ...
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Rhynchozoon latiavicularium Dick & Ngai & Doan 2020, n. sp.
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Autor/in / Beteiligte Person: | Dick, Matthew H. ; Ngai, Nguyen Danh ; Doan, Hung Dinh |
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Zeitschrift: | Taxonomy and diversity of coelobite bryozoans from drift coral cobbles on Co To Island, northern Vietnam, pp. 201-252 in Zootaxa 4747(2) 237-239, 2020 |
Veröffentlichung: | 2020 |
Medientyp: | unknown |
DOI: | 10.5281/zenodo.3703704 |
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