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Schilthuizen Menno - One of the best experts on this subject based on the ideXlab platform.
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Figure 38-39 from: Vermeulen JJ, Liew TS, Schilthuizen M (2015) Additions to the knowledge of the land snails of Sabah (Malaysia, Borneo), including 48 new species. ZooKeys 531: 1-139. https://doi.org/10.3897/zookeys.531.6097
2015Co-Authors: Vermeulen Jaap, Liew Thor-seng, Schilthuizen MennoAbstract:Figure 38-39 - 38 Microcystina muscorum Van Benthem Jutting, 1959 38A SEM image of the third whorl 38B SEM image of apex (Malaysia, Sabah, Kinabatangan river valley, Batu Mawas, leg. M. Schilthuizen, BOR/MOL 1341) 39 Microcystina gratilla Van Benthem Jutting, 1950 39A SEM image of the third whorl 39B SEM image of apex (Malaysia, Sabah, Kinabalu N.P., Monggis-Tambuyukon trail between 896 and 1016 m alt., BOR/MOL 4141)
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Figure 35-37 from: Vermeulen JJ, Liew TS, Schilthuizen M (2015) Additions to the knowledge of the land snails of Sabah (Malaysia, Borneo), including 48 new species. ZooKeys 531: 1-139. https://doi.org/10.3897/zookeys.531.6097
2015Co-Authors: Vermeulen Jaap, Liew Thor-seng, Schilthuizen MennoAbstract:Figure 35-37 - 35 Microcystina muscorum Van Benthem Jutting, 1959 35A Frontal view, shell 1.2 mm high 35B Apical view 35C Umbilical view (Indonesia, Bali, Danau Buyan, V 3974) 36 Microcystina gratilla Van Benthem Jutting, 1950. 36A Frontal view, shell 2.0 mm high 36B Apical view 36C Umbilical view (Indonesia, Java, limestone mountains near Padalarang, ZMA s.n.) 37 Microcystina physotrochus sp. n. 37A Frontal view, shell 2.0 mm high 37B Apical view 37C Umbilical view (Malaysia, Sabah, Kinabatangan valley, Batu Keruak 2 near Sukau, RMNH.5003937, holotype)
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Figure 56-58 from: Vermeulen JJ, Liew TS, Schilthuizen M (2015) Additions to the knowledge of the land snails of Sabah (Malaysia, Borneo), including 48 new species. ZooKeys 531: 1-139. https://doi.org/10.3897/zookeys.531.6097
2015Co-Authors: Vermeulen Jaap, Liew Thor-seng, Schilthuizen MennoAbstract:Figure 56-58 - 56 Kaliella nephelophila (Tillier & Bouchet, 1988). 56A Frontal view, shell 3.5 mm high 56B Umbilical view (Malaysia, Sabah, Kinabalu N.P., V 13495, shell partially reconstructed) 57 Kaliella kinabaluensis (Tillier & Bouchet, 1988). 57A Frontal view, shell 5.3 mm high 57B Umbilical view (Malaysia, Sabah, Kinabalu N.P., V 13478, last 1/3 whorl reconstructed) 58 Kaliella dendrophila (Van Benthem Jutting, 1950). 58A Frontal view, shell 2.7 mm high 58B Umbilical view (Malaysia, Sabah, Sandakan Province, Kinabatangan river valley, Batu Pangi, V 9647)
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Figure 29-32 from: Vermeulen JJ, Liew TS, Schilthuizen M (2015) Additions to the knowledge of the land snails of Sabah (Malaysia, Borneo), including 48 new species. ZooKeys 531: 1-139. https://doi.org/10.3897/zookeys.531.6097
2015Co-Authors: Vermeulen Jaap, Liew Thor-seng, Schilthuizen MennoAbstract:Figure 29-32 - 29 Microcystina callifera sp. n. SEM image of the third whorl (Malaysia, Sabah, Mantanani Islands, Pulau Lungisan, BOR/MOL 3746) 30 Microcystina striatula sp. n. SEM image of the third whorl (Malaysia, Sabah, Pulau Tiga, BOR/MOL 1100, lost) 31 Microcystina sinica Von Moellendorff, 1885. SEM image of the third whorl (material and data lost) 32 Microcystina consobrina Van Benthem Jutting, 1959. SEM image of the third whorl (Malaysia, Sabah, Kinabalu N.P., Kotal route between 2292 and 3112 m alt., BOR/MOL 4003)
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Figure 62-65 from: Vermeulen JJ, Liew TS, Schilthuizen M (2015) Additions to the knowledge of the land snails of Sabah (Malaysia, Borneo), including 48 new species. ZooKeys 531: 1-139. https://doi.org/10.3897/zookeys.531.6097
2015Co-Authors: Vermeulen Jaap, Liew Thor-seng, Schilthuizen MennoAbstract:Figure 62-65 - 62 Kaliella nephelophila (Tillier & Bouchet, 1988). SEM image of the third whorl (Malaysia, Sabah, Kinabalu N.P., Pakka, 3080 m alt., (BOR/MOL 2873, lost) 63 Kaliella dendrophila (Van Benthem Jutting, 1950). SEM image of the third whorl (Malaysia, Sabah, Kinabatangan River valley, Gomantong, BOR/MOL 3661, lost) 64 Kaliella punctata sp. n. SEM image of the third whorl (Malaysia, Sabah, Sepulut valley, Batu Punggul, BOR/MOL 4325) 65 Kaliella calculosa (Gould, 1852). SEM image of the third whorl (Malaysia, Sabah, Tawau Province, Danum Valley, BOR/MOL 815)
Liew Thor-seng - One of the best experts on this subject based on the ideXlab platform.
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Figure 30 from: Foon JK, Clements GR, Liew T-S (2017) Diversity and biogeography of land snails (Mollusca, Gastropoda) in the limestone hills of Perak, Peninsular Malaysia. ZooKeys 682: 1-94. https://doi.org/10.3897/zookeys.682.12999
2017Co-Authors: Foon, Junn Kitt, Clements, Gopalasamy Reuben, Liew Thor-sengAbstract:Figure 30 - A Videna castra (Benson, 1852b) BOR/MOL 11135. Perak, Ipoh, Gunung Tempurung Plot 1 B Gyliotrachela hungerfordiana (von Möllendorff, 1886) BOR/MOL 9133. Perak, Ipoh, Gunung Kanthan C Gyliotrachela luctans Van Benthem Jutting, 1950 BOR/MOL 10064. Perak, Ipoh, Gunung Datok D Paraboysidia oreia Van Benthem Jutting, 1961 BOR/MOL 10504. Perak, Ipoh, Gunun
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Figure 12 from: Foon JK, Clements GR, Liew T-S (2017) Diversity and biogeography of land snails (Mollusca, Gastropoda) in the limestone hills of Perak, Peninsular Malaysia. ZooKeys 682: 1-94. https://doi.org/10.3897/zookeys.682.12999
2017Co-Authors: Foon, Junn Kitt, Clements, Gopalasamy Reuben, Liew Thor-sengAbstract:Figure 12 - A Opisthostoma castor Van Benthem Jutting, 1952 BOR/MOL 10115. Perak, Ipoh, Gua Tok Giring Plot 1 B Opisthostoma cf. gittenbergeri BOR/MOL 9151. Perak, Ipoh, Gunung Kanthan Plot 4 C Opisthostoma cf. subconicum BOR/MOL 9183. Perak, Ipoh, Gunung Kanthan Plot 4 D Opisthostoma cf. vermiculum BOR/MOL 11400. Perak, Ipoh, Gunung Tempurung Plot 2
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Figure 14 from: Foon JK, Clements GR, Liew T-S (2017) Diversity and biogeography of land snails (Mollusca, Gastropoda) in the limestone hills of Perak, Peninsular Malaysia. ZooKeys 682: 1-94. https://doi.org/10.3897/zookeys.682.12999
2017Co-Authors: Foon, Junn Kitt, Clements, Gopalasamy Reuben, Liew Thor-sengAbstract:Figure 14 - A Opisthostoma paulucciae ((Crosse and Nevill, in Crosse, 1879b)) BOR/MOL 9019. Perak, Ipoh, Gunung Kanthan B Opisthostoma 'tempurung 1 detached' BOR/MOL 12504. Perak, Ipoh, Gunung Tempurung Plot 4 C Opisthostoma trapezium Van Benthem Jutting, 1952 BOR/MOL 9035. Perak, Ipoh, Gunung Kanthan D Opisthostoma vermiculum Clements and Vermeulen, in Clements et al., 2008 BOR/MOL 10242. Perak, Ipoh, Gunung Rapat
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Figure 38-39 from: Vermeulen JJ, Liew TS, Schilthuizen M (2015) Additions to the knowledge of the land snails of Sabah (Malaysia, Borneo), including 48 new species. ZooKeys 531: 1-139. https://doi.org/10.3897/zookeys.531.6097
2015Co-Authors: Vermeulen Jaap, Liew Thor-seng, Schilthuizen MennoAbstract:Figure 38-39 - 38 Microcystina muscorum Van Benthem Jutting, 1959 38A SEM image of the third whorl 38B SEM image of apex (Malaysia, Sabah, Kinabatangan river valley, Batu Mawas, leg. M. Schilthuizen, BOR/MOL 1341) 39 Microcystina gratilla Van Benthem Jutting, 1950 39A SEM image of the third whorl 39B SEM image of apex (Malaysia, Sabah, Kinabalu N.P., Monggis-Tambuyukon trail between 896 and 1016 m alt., BOR/MOL 4141)
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Figure 35-37 from: Vermeulen JJ, Liew TS, Schilthuizen M (2015) Additions to the knowledge of the land snails of Sabah (Malaysia, Borneo), including 48 new species. ZooKeys 531: 1-139. https://doi.org/10.3897/zookeys.531.6097
2015Co-Authors: Vermeulen Jaap, Liew Thor-seng, Schilthuizen MennoAbstract:Figure 35-37 - 35 Microcystina muscorum Van Benthem Jutting, 1959 35A Frontal view, shell 1.2 mm high 35B Apical view 35C Umbilical view (Indonesia, Bali, Danau Buyan, V 3974) 36 Microcystina gratilla Van Benthem Jutting, 1950. 36A Frontal view, shell 2.0 mm high 36B Apical view 36C Umbilical view (Indonesia, Java, limestone mountains near Padalarang, ZMA s.n.) 37 Microcystina physotrochus sp. n. 37A Frontal view, shell 2.0 mm high 37B Apical view 37C Umbilical view (Malaysia, Sabah, Kinabatangan valley, Batu Keruak 2 near Sukau, RMNH.5003937, holotype)
Vermeulen Jaap - One of the best experts on this subject based on the ideXlab platform.
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Figure 38-39 from: Vermeulen JJ, Liew TS, Schilthuizen M (2015) Additions to the knowledge of the land snails of Sabah (Malaysia, Borneo), including 48 new species. ZooKeys 531: 1-139. https://doi.org/10.3897/zookeys.531.6097
2015Co-Authors: Vermeulen Jaap, Liew Thor-seng, Schilthuizen MennoAbstract:Figure 38-39 - 38 Microcystina muscorum Van Benthem Jutting, 1959 38A SEM image of the third whorl 38B SEM image of apex (Malaysia, Sabah, Kinabatangan river valley, Batu Mawas, leg. M. Schilthuizen, BOR/MOL 1341) 39 Microcystina gratilla Van Benthem Jutting, 1950 39A SEM image of the third whorl 39B SEM image of apex (Malaysia, Sabah, Kinabalu N.P., Monggis-Tambuyukon trail between 896 and 1016 m alt., BOR/MOL 4141)
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Figure 35-37 from: Vermeulen JJ, Liew TS, Schilthuizen M (2015) Additions to the knowledge of the land snails of Sabah (Malaysia, Borneo), including 48 new species. ZooKeys 531: 1-139. https://doi.org/10.3897/zookeys.531.6097
2015Co-Authors: Vermeulen Jaap, Liew Thor-seng, Schilthuizen MennoAbstract:Figure 35-37 - 35 Microcystina muscorum Van Benthem Jutting, 1959 35A Frontal view, shell 1.2 mm high 35B Apical view 35C Umbilical view (Indonesia, Bali, Danau Buyan, V 3974) 36 Microcystina gratilla Van Benthem Jutting, 1950. 36A Frontal view, shell 2.0 mm high 36B Apical view 36C Umbilical view (Indonesia, Java, limestone mountains near Padalarang, ZMA s.n.) 37 Microcystina physotrochus sp. n. 37A Frontal view, shell 2.0 mm high 37B Apical view 37C Umbilical view (Malaysia, Sabah, Kinabatangan valley, Batu Keruak 2 near Sukau, RMNH.5003937, holotype)
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Figure 56-58 from: Vermeulen JJ, Liew TS, Schilthuizen M (2015) Additions to the knowledge of the land snails of Sabah (Malaysia, Borneo), including 48 new species. ZooKeys 531: 1-139. https://doi.org/10.3897/zookeys.531.6097
2015Co-Authors: Vermeulen Jaap, Liew Thor-seng, Schilthuizen MennoAbstract:Figure 56-58 - 56 Kaliella nephelophila (Tillier & Bouchet, 1988). 56A Frontal view, shell 3.5 mm high 56B Umbilical view (Malaysia, Sabah, Kinabalu N.P., V 13495, shell partially reconstructed) 57 Kaliella kinabaluensis (Tillier & Bouchet, 1988). 57A Frontal view, shell 5.3 mm high 57B Umbilical view (Malaysia, Sabah, Kinabalu N.P., V 13478, last 1/3 whorl reconstructed) 58 Kaliella dendrophila (Van Benthem Jutting, 1950). 58A Frontal view, shell 2.7 mm high 58B Umbilical view (Malaysia, Sabah, Sandakan Province, Kinabatangan river valley, Batu Pangi, V 9647)
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Figure 29-32 from: Vermeulen JJ, Liew TS, Schilthuizen M (2015) Additions to the knowledge of the land snails of Sabah (Malaysia, Borneo), including 48 new species. ZooKeys 531: 1-139. https://doi.org/10.3897/zookeys.531.6097
2015Co-Authors: Vermeulen Jaap, Liew Thor-seng, Schilthuizen MennoAbstract:Figure 29-32 - 29 Microcystina callifera sp. n. SEM image of the third whorl (Malaysia, Sabah, Mantanani Islands, Pulau Lungisan, BOR/MOL 3746) 30 Microcystina striatula sp. n. SEM image of the third whorl (Malaysia, Sabah, Pulau Tiga, BOR/MOL 1100, lost) 31 Microcystina sinica Von Moellendorff, 1885. SEM image of the third whorl (material and data lost) 32 Microcystina consobrina Van Benthem Jutting, 1959. SEM image of the third whorl (Malaysia, Sabah, Kinabalu N.P., Kotal route between 2292 and 3112 m alt., BOR/MOL 4003)
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Figure 62-65 from: Vermeulen JJ, Liew TS, Schilthuizen M (2015) Additions to the knowledge of the land snails of Sabah (Malaysia, Borneo), including 48 new species. ZooKeys 531: 1-139. https://doi.org/10.3897/zookeys.531.6097
2015Co-Authors: Vermeulen Jaap, Liew Thor-seng, Schilthuizen MennoAbstract:Figure 62-65 - 62 Kaliella nephelophila (Tillier & Bouchet, 1988). SEM image of the third whorl (Malaysia, Sabah, Kinabalu N.P., Pakka, 3080 m alt., (BOR/MOL 2873, lost) 63 Kaliella dendrophila (Van Benthem Jutting, 1950). SEM image of the third whorl (Malaysia, Sabah, Kinabatangan River valley, Gomantong, BOR/MOL 3661, lost) 64 Kaliella punctata sp. n. SEM image of the third whorl (Malaysia, Sabah, Sepulut valley, Batu Punggul, BOR/MOL 4325) 65 Kaliella calculosa (Gould, 1852). SEM image of the third whorl (Malaysia, Sabah, Tawau Province, Danum Valley, BOR/MOL 815)
Lutz Schroder - One of the best experts on this subject based on the ideXlab platform.
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a quantified coalgebraic Van Benthem theorem
Foundations of Software Science and Computation Structure, 2021Co-Authors: Paul Wild, Lutz SchroderAbstract:The classical Van Benthem theorem characterizes modal logic as the bisimulation-invariant fragment of first-order logic; put differently, modal logic is as expressive as full first-order logic on bisimulation-invariant properties. This result has recently been extended to two flavours of quantitative modal logic, viz. fuzzy modal logic and probabilistic modal logic. In both cases, the quantitative Van Benthem theorem states that every formula in the respective quantitative variant of first-order logic that is bisimulation-invariant, in the sense of being nonexpansive w.r.t. behavioural distance, can be approximated by quantitative modal formulae of bounded rank. In the present paper, we unify and generalize these results in three directions: We lift them to full coalgebraic generality, thus covering a wide range of system types including, besides fuzzy and probabilistic transition systems as in the existing examples, e.g. also metric transition systems; and we generalize from real-valued to quantale-valued behavioural distances, e.g. nondeterministic behavioural distances on metric transition systems; and we remove the symmetry assumption on behavioural distances, thus covering also quantitative notions of simulation.
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a Van Benthem theorem for quantitative probabilistic modal logic
arXiv: Logic in Computer Science, 2018Co-Authors: Paul Wild, Lutz Schroder, Dirk Pattinson, Barbara KonigAbstract:In probabilistic transition systems, behavioural metrics provide a more fine-grained and stable measure of system equivalence than crisp notions of bisimilarity. They correlate strongly to quantitative probabilistic logics, and in fact the distance induced by a probabilistic modal logic taking values in the real unit interval has been shown to coincide with behavioural distance. For probabilistic systems, probabilistic modal logic thus plays an analogous role to that of Hennessy-Milner logic on classical labelled transition systems. In the quantitative setting, invariance of modal logic under bisimilarity becomes non-expansivity of formula evaluation w.r.t. behavioural distance. In the present paper, we provide a characterization of the expressive power of probabilistic modal logic based on this observation: We prove a probabilistic analogue of the classical Van Benthem theorem, which states that modal logic is precisely the bisimulation-invariant fragment of first-order logic. Specifically, we show that quantitative probabilistic modal logic lies dense in the bisimulation-invariant fragment, in the indicated sense of non-expansive formula evaluation, of quantitative probabilistic first-order logic; more precisely, bisimulation-invariant first-order formulas are approximable by modal formulas of bounded rank. For a description logic perspective on the same result, see arXiv:1906.00784.
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a Van Benthem theorem for fuzzy modal logic
arXiv: Logic in Computer Science, 2018Co-Authors: Paul Wild, Lutz Schroder, Dirk Pattinson, Barbara KonigAbstract:We present a fuzzy (or quantitative) version of the Van Benthem theorem, which characterizes propositional modal logic as the bisimulation-invariant fragment of first-order logic. Specifically, we consider a first-order fuzzy predicate logic along with its modal fragment, and show that the fuzzy first-order formulas that are non-expansive w.r.t. the natural notion of bisimulation distance are exactly those that can be approximated by fuzzy modal formulas.
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A Characterization Theorem for a Modal Description Logic
International Joint Conferences on Artificial Intelligence Organization, 2017Co-Authors: Paul Wild, Lutz SchroderAbstract:Modal description logics feature modalities that capture dependence of knowledge on parameters such as time, place, or the information state of agents. E.g., the logic S5-ALC combines the standard description logic ALC with an S5-modality that can be understood as an epistemic operator or as representing (undirected) change. This logic embeds into a corresponding modal first-order logic S5-FOL. We prove a modal characterization theorem for this embedding, in analogy to results by Van Benthem and Rosen relating ALC to standard first-order logic: We show that S5-ALC with only local roles is, both over finite and over unrestricted models, precisely the bisimulation-invariant fragment of S5-FOL, thus giving an exact description of the expressive power of S5-ALC with only local roles.
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a Van Benthem rosen theorem for coalgebraic predicate logic
Journal of Logic and Computation, 2015Co-Authors: Lutz Schroder, Dirk Pattinson, Tadeusz LitakAbstract:Coalgebraic modal logic serves as a unifying framework to study a wide range of modal logics beyond the relational realm, including probabilistic and graded logics as well as conditional logics and logics based on neighbourhoods and games. Coalgebraic predicate logic (CPL), a generalization of a neighbourhood-based first-order logic introduced by Chang, has been identified as a natural first-order extension of coalgebraic modal logic, which in particular coincides with the standard first-order correspondence language when instantiated to Kripke-style relational modal operators. Here, we generalize to the CPL setting the classical Van Benthem/Rosen theorem stating that both over arbitrary and over finite models, modal logic is precisely the bisimulation-invariant fragment of first-order logic. As instances of this generic result, we obtain corresponding characterizations for, e.g. conditional logic, neighbourhood logic (i.e. classical modal logic) and monotone modal logic.
Marzuki, Mohammad Effendi - One of the best experts on this subject based on the ideXlab platform.
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Figures 17 from: Liew T, Vermeulen J, Marzuki M, Schilthuizen M (2014) A cybertaxonomic revision of the micro-landsnail genus Plectostoma Adam (Mollusca, Caenogastropoda, Diplommatinidae), from Peninsular Malaysia, Sumatra and Indochina. ZooKeys 393: 1-107. https://doi.org/10.3897/zookeys.393.6717
2014Co-Authors: Liew Thor-seng, Vermeulen, Jaap Jan, Marzuki, Mohammad Effendi, Schilthuizen MennoAbstract:Figures 17 - Photographs of 17 living Plectostoma species. A Plectostoma salpidomon (Van Benthem Jutting, 1952), BOR 5569 B Plectostoma umbilicatum (Van Benthem Jutting, 1952), BOR 5503 C Plectostoma palinhelix (Van Benthem Jutting, 1952), BOR 5520 D Plectostoma kakiense (Tomlin, 1948), BOR 5516 E Plectostoma mengaburensis sp. n., BOR 5574 F Plectostoma kubuensis sp. n., BOR 5518 G Plectostoma whitteni sp. n., BOR 5536 H Plectostoma senex (Van Benthem Jutting, 1952), BOR 5631 I Plectostoma crassipupa (Van Benthem Jutting, 1952), BOR 5515 J Plectostoma ikanensis sp. n. Form BOR 5507, BOR 5507 K Plectostoma ikanensis sp. n. Form BOR 5504, BOR 5504 L Plectostoma sinyumensis (Maassen, 2001), BOR 5537 M Plectostoma crassipupa (Van Benthem Jutting, 1952), BOR 5512 N Plectostoma siphonostomum (Van Benthem Jutting, 1952), BOR 5557 O Plectostoma laidlawi (Sykes, 1902) Form BOR 5510, BOR 5510 P Plectostoma relauensis sp. n., BOR 5511 Q Plectostoma christae (Maassen, 2001), BOR 5505 R Plectostoma retrovertens (Tomlin, 1938), BOR 5559 S Plectostoma tohchinyawi sp. n., BOR 5533
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Figures 30 from: Liew T, Vermeulen J, Marzuki M, Schilthuizen M (2014) A cybertaxonomic revision of the micro-landsnail genus Plectostoma Adam (Mollusca, Caenogastropoda, Diplommatinidae), from Peninsular Malaysia, Sumatra and Indochina. ZooKeys 393: 1-107. https://doi.org/10.3897/zookeys.393.6717
2014Co-Authors: Liew Thor-seng, Vermeulen, Jaap Jan, Marzuki, Mohammad Effendi, Schilthuizen MennoAbstract:Figures 30 - Plectostoma senex (Van Benthem Jutting, 1952) BOR 5603. A frontal view B left lateral view C back view D right lateral view E top view F bottom view G parietal part of constriction inner whorl H basal part of constriction inner whorl. Scale bar = 1 mm (for A–F)
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Figures 41 from: Liew T, Vermeulen J, Marzuki M, Schilthuizen M (2014) A cybertaxonomic revision of the micro-landsnail genus Plectostoma Adam (Mollusca, Caenogastropoda, Diplommatinidae), from Peninsular Malaysia, Sumatra and Indochina. ZooKeys 393: 1-107. https://doi.org/10.3897/zookeys.393.6717
2014Co-Authors: Liew Thor-seng, Vermeulen, Jaap Jan, Marzuki, Mohammad Effendi, Schilthuizen MennoAbstract:Figures 41 - Plectostoma laemodes (Van Benthem Jutting, 1961) ZMA 136011. A frontal view B left lateral view C back view D right lateral view E top view F bottom view G parietal part of constriction inner whorl H basal part of constriction inner whorl. Scale bar = 1 mm (for A–F)
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Figures 23 from: Liew T, Vermeulen J, Marzuki M, Schilthuizen M (2014) A cybertaxonomic revision of the micro-landsnail genus Plectostoma Adam (Mollusca, Caenogastropoda, Diplommatinidae), from Peninsular Malaysia, Sumatra and Indochina. ZooKeys 393: 1-107. https://doi.org/10.3897/zookeys.393.6717
2014Co-Authors: Liew Thor-seng, Vermeulen, Jaap Jan, Marzuki, Mohammad Effendi, Schilthuizen MennoAbstract:Figures 23 - Plectostoma siphonostomum (Van Benthem Jutting, 1952) BOR5539. A frontal view B left lateral view C back view D right lateral view E top view F bottom view G parietal part of constriction inner whorl H basal part of constriction inner whorl. Scale bar = 1 mm (for A–F)
