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Hydrocena gutta Shuttleworth, 1852
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Georissa exarata Von Moellendorff, 1900
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Hydrocena spec.
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Georissa elegans Von Moellendorff
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Hydrocena striata Pease
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Figure 18; Georissa nephrostoma Vermeulen et al., 2015. A–K MZU/MOL 17.29 A, D shell apertural view B shell side view C shell rear view E, F shell cross-section from 3D model G, H operculum frontal and ventral view from 3D model I shell top view J protoconch side view K close up of protoconch from top at 1000 × magnification. Scale bars: 500 µm (A–I); 200 µm (J); 10 µm (K). Shell image of the apertural view (Fig. 18D) is the same as shown in Khalik et al. (2018: fig. 1K).
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Hydrocena gutta Shuttleworth, 1852
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Georissa subglabrata Von Moellendorff, 1887
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Georissa bangueyensis Smith, 1895
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Figure 6; Georissa corrugata sp. n. A–C Holotype: MZU/MOL 16.15 D–I paratype: MZU/MOL 16.16 A, D shell apertural view B shell side view C shell rear view E, F shell cross-section from 3D model G shell top view H protoconch side view I close up of protoconch from top at 1000 × magnification. Scale bars: 500 µm (A–G); 200 µm (H); 10 µm (I).
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Figure 9; Georissa trusmadi sp. n. A–C Holotype: MZU/MOL 16.17 D–K paratype: MZU/MOL 16.18 A, D shell apertural view B shell side view C shell rear view E, F shell cross-section from 3D model G, H operculum frontal and ventral view from 3D model I shell top view J protoconch side view K close up of protoconch from top at 1000 × magnification. Scale bars: 500 µm (A–I); 200 µm (J); 10 µm (K).
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[Photos by NHMUK] Khalik MZ, Hendriks KP, Vermeulen JJ, Schilthuizen M (2019) Conchological and molecular analysis of the “non-scaly” Bornean Georissa with descriptions of three new species (Gastropoda, Neritimorpha, Hydrocenidae). ZooKeys 840: 35-86. https://doi.org/10.3897/zookeys.840.33326
Wikimedia Commons
Figure 1; The types specimens of the “non-scaly” Georissa of Borneo from NHMUK. A Georissa borneensis Smith, 1895 B Georissa everetti Smith, 1895 C Georissa williamsi Godwin-Austen, 1889 D Georissa hungerfordi Godwin-Austen, 1889 E Georissa gomantonensis Smith, 1893 F Georissa similis Smith, 1893 G Georissa xesta Thompson & Dance, 1983 H Georissa bangueyensis Smith, 1895 I Georissa flavescens Smith, 1895. Scale bar: 1 mm. Photos by NHMUK.
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Figure 16; Georissa kinabatanganensis sp. n. A–C Holotype: BOR/MOL 13921 D–K Paratypes: MZU/MOL 17.26. A, D Shell apertural view B Shell side view C Shell rear view E–F Shell cross-section from 3D model G–H Operculum frontal and ventral view I Shell top view J Protoconch side view K Close up of protoconch from top at 1000× magnification. Scale bars: 500 µm (A–I); 200 µm (J); 10 µm (K).
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Georissa subglabrata Von Moellendorff, 1887
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Georissa monterosatiana Godwin-Austen & Nevill, 1879
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Georissa monterosatiana Godwin-Austen & Nevill, 1879
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Georissa quadrasi Von Moellendorff, 1895
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Figure 14; Georissa insulae sp. n. A–C Holotype: MZU/MOL 18.01 D–K paratype: MZU/MOL 18.02 A, D shell apertural view B shell side view C shell rear view E, F shell cross-section from 3D model G, H operculum frontal and ventral view from 3D model I shell top view J protoconch side view K close up of protoconch from top at 1000 × magnification. Scale bars: 500 µm (A–I); 200 µm (J); 10 µm (K).
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Georissa spec.
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Figure 17; Georissa sepulutensis sp. n. A–C Holotype: BOR/MOL 13922 D–K Paratypes: BOR/MOL 12278. A, D Shell apertural view B Shell side view C Shell rear view E–F Shell cross-section from 3D model G–H Operculum frontal and ventral view I Shell top view J Protoconch side view K Close up of protoconch from top at 1000× magnification. Scale bars: 500 µm (A–I); 200 µm (J); 10 µm (K).
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Georissa similis Smith, 1893
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Figure 9; Georissa muluensis sp. n. A–C Holotype: MZU/MOL 17.86 D–K Paratypes: MZU/MOL 17.30. A, D Shell apertural view B Shell side view C Shell rear view E–F Shell cross-section from 3D model G–H Operculum frontal and ventral view I Shell top view J Protoconch side view. K. Close up of protoconch from top at 1000× magnification. Scale bars: 500 µm (A–I); 200 µm (J); 10 µm (K).
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Georissa borneensis Smith, 1895
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Figure 15; Georissa pyrrhoderma Thompson & Dance, 1983. A–C MZU/MOL 17.10 D–K MZU/MOL 17.09. A, D Shell apertural view B Shell side view C Shell rear view E–F Shell cross-section from 3D model G–H Operculum frontal and ventral view I Shell top view J Protoconch side view K Close up of protoconch from top at 1000× magnification. Scale bars: 500 µm (A–I); 200 µm (J); 10 µm (K).