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| Egile Nagusiak: | , , , , |
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| Formatua: | Recurso digital |
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Zenodo
2025
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| Gaiak: | |
| Sarrera elektronikoa: | https://doi.org/10.5281/zenodo.17570842 |
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Etiketa erantsi
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Aurkibidea:
- <p><i>Schwartziella triticea</i> (Pease, 1861)</p><p><b>Materials</b></p><p><b>Type status:</b> Other material. <b>Occurrence:</b> catalogNumber: XCL 59; recordedBy: Qi Lu; individualCount: 1; lifeStage: adult; occurrenceID: 20A6B31E-18D4-513E-9DB0-3DA25563A15D; <b>Taxon:</b> taxonID: Native; scientificName: <i>Schwartziella triticea</i>; originalNameUsage: <i>Rissoina triticea</i> Pease, 1861, <i>Rissoina rissoi</i> Weinkauff, 1881; <b>Location:</b> country: China; stateProvince: Hainan; locality: Chiling; <b>Identification:</b> identifiedBy: Qi Lu; dateIdentified: 2023</p><p><b>Description</b></p><p>Shell minute (3.4 ± 0.25 mm in height; 1.5 ± 0.01 mm in width), fusiform-ovate in shape, white, solid and translucent (Fig. 1 A and B). Seven whorls, body whorl height greater than spire (Fig. 1 C and D); teleoconch whorls 4, inflated, sculptured exclusively by axial ribs with wide intercostal spaces (approximately twice the width of ribs), axial ribs on body whorl constricted at base (Fig. 1 C-F); shell surface with fine microsculpture (Fig. 1 F). Suture distinct, but shallow (Fig. 1 F). Aperture large, D-shaped, angulated posteriorly, without anterior channel; outer lip prosocline, thick, with varix, bearing fine growth lines on edge; inner lip and columellar lip forming straight line, thick, broad, everted at columella; interior of aperture with delicate annular sculpture (Fig. 1 E). Base lacking folds. Umbilicus absent. Protoconch of 3 whorls, eroded (Fig. 1 G and H).</p><p><b>Diagnosis</b></p><p>Shell somewhat fusiformly ovate; ribs nine, prominent, smooth, continuous over the sutures; aperture ovate (Pease 1861).</p><p><b>Distribution</b></p><p><i>Schwartziella triticea</i> exhibits a broad tropical distribution, ranging from the Red Sea across the Indian Ocean. It is also recorded from Hainan Island (China) and Hawaiian waters (Sleurs and Strack 2021).</p><p><b>Taxon discussion</b></p><p>The genus <i>Schwartziella</i> Nevill, 1881 is primarily characterised by prominent axial ribs on the shell surface, with ribs on the body whorl extending continuously to the base. It differs from <i>Rissoina</i> in lacking an anterior canal in the aperture and possessing an inner operculum without peg-like projections. When compared to <i>Zebina</i> H. Adams & A. Adams, 1854, <i>Schwartziella</i> Nevill, 1881 shows minimal anatomical distinctions, but exhibits more robust axial ribbing. <i>S. triticea</i> closely resembles <i>S. laseroni</i> (C. - K. Chang & W. - L. Wu, 2004); however, the latter can be distinguished by the presence of basal plicae and a narrower columellar lip.</p>