ZooKeys 531: Additions to the Knowledge of the Land Snails of Sabah (Malaysia, Borneo), Including 48 New Species

About this book

This article is the culmination of several decades of work on the land snail fauna of Sabah, Malaysian Borneo. In it, the fauna for several problematic land snail genera is revised, namely Acmella and Anaglyphula (Caenogastropoda: Assimineidae), Ditropopsis (Caenogastropoda: Cyclophoridae), Microcystina (Pulmonata: Ariophantidae), Philalanka and Thysanota (Pulmonata: Endodontidae), Kaliella and Rahula, (Pulmonata: Euconulidae), and Trochomorpha and Geotrochus (Pulmonata: Trochomorphidae). In addition, new species are added to previously revised genera, such as Diplommatina (Diplommatinidae) and Georissa (Hydrocenidae), as well as some new species of genera not revised previously, such as Japonia (Cyclophoridae), Durgella and Dyakia (Ariophantidae), Amphidromus and Trachia (Camaenidae), Paralaoma (Punctidae), and Curvella (Subulinidae). The authors distinguish 48 new species, and re-describe a further 31. Since most species were collected with techniques that are aimed at gathering empty shells, the descriptions are based on conchology only. It is hoped that this paper will generate renewed interest in the rich snail fauna of this region, and will serve as a basis for further anatomical, evolutionary, and ecological studies.

Contents

Introduction   5

Systematics   6
Clade: CAENOGASTROPODA Cox   6
   Family ASSIMINEIDAE H. & A. Adams   6
      Genus Acmella Blanford, 1869   6
         Acmella cyrtoglyphe Vermeulen, Liew & Schilthuizen, sp. n.   7
         Acmella umbilicata Vermeulen, Liew & Schilthuizen, sp. n.   9
         Acmella polita Von Moellendorff, 1887   10
         Acmella ovoidea Vermeulen, Liew & Schilthuizen, sp. n.   12
         Acmella nana Vermeulen, Liew & Schilthuizen, sp. n.   14
         Acmella subcancellata Vermeulen, Liew & Schilthuizen, sp. n.   14
         Acmella striata Vermeulen, Liew & Schilthuizen, sp. n.   16
      Genus Anaglyphula Rensch, 1932   17
         Anaglyphula sauroderma Vermeulen, Liew & Schilthuizen, sp. n.   18
   Family CYCLOPHORIDAE Gray   18
      Genus Ditropopsis E.A. Smith, 1897   19
         Ditropopsis davisoni Vermeulen, Liew & Schilthuizen, sp. n.   20
         Ditropopsis trachychilus Vermeulen, Liew & Schilthuizen, sp. n.   22
         Ditropopsis koperbergi (Zilch, 1955)   23
         Ditropopsis tyloacron Vermeulen, Liew & Schilthuizen, sp. n.   23
         Ditropopsis constricta Vermeulen, Liew & Schilthuizen, sp. n.   25
         Ditropopsis cincta Vermeulen, Liew & Schilthuizen, sp. n.   26
         Ditropopsis imadatei (Habe, 1965)   27
      Genus Japonia Gould, 1859   28
         Japonia anceps Vermeulen, Liew & Schilthuizen, sp. n.   28
   Family DIPLOMMATINIDAE Pfeiffer   30
      Genus Diplommatina Benson, 1849   31
         Diplommatina bidentata Vermeulen, Liew & Schilthuizen, sp. n.   31
         Diplommatina tylocheilos Vermeulen, Liew & Schilthuizen, sp. n.   32
Unranked clade: NERITOMORPHA   32
   Family HYDROCENIDAE Troschel   32
      Genus Georissa Blanford, 1864   33
         Georissa leucococca Vermeulen, Liew & Schilthuizen, sp. n.   33
         Georissa nephrostoma Vermeulen, Liew & Schilthuizen, sp. n.   34
Clade: PULMONATA Cuvier   35
   Family ARIOPHANTIDAE Godwin Austen   35
      Genus Durgella Blanford, 1863   35
         ‘Durgella’ densestriata Vermeulen, Liew & Schilthuizen, sp. n.   36
      Genus Dyakia Godwin Austen 1891   37
         Dyakia chlorosoma Vermeulen, Liew & Schilthuizen, sp. n.   37
      Genus Microcystina Mörch, 1872   39
         Microcystina microrhynchus Vermeulen, Liew & Schilthuizen, sp. n.   40
         Microcystina callifera Vermeulen, Liew & Schilthuizen, sp. n.   44
         Microcystina striatula Vermeulen, Liew & Schilthuizen, sp. n.   44
         Microcystina sinica Von Moellendorff, 1885   46
         Microcystina consobrina Van Benthem Jutting, 1959   49
         Microcystina planiuscula Vermeulen, Liew & Schilthuizen, sp. n.   50
         Microcystina appendiculata (Von Moellendorff, 1893)   50
         Microcystina muscorum Van Benthem Jutting, 1959   53
         Microcystina gratilla Van Benthem Jutting, 1950   56
         Microcystina physotrochus Vermeulen, Liew & Schilthuizen, sp. n.   57
   Family CAMAENIDAE Pilsbry   59
      Genus Amphidromus Albers, 1850   59
         Amphidromus psephos Vermeulen, Liew & Schilthuizen, sp. n.   59
      Genus Trachia Albers, 1860   61
         Trachia serpentinitica Vermeulen, Liew & Schilthuizen, sp. n.   61
   Family ENDODONTIDAE Pilsbry   61
      Genus Philalanka Godwin Austen, 1898   62
         Philalanka tambunanensis Vermeulen, Liew & Schilthuizen, sp. n.   63
         Philalanka kusana (Aldrich, 1889)   64
         Philalanka moluensis (E.A. Smith, 1893)   67
         Philalanka obscura Vermeulen, Liew & Schilthuizen, sp. n.   69
         Philalanka thienemanni B. Rensch, 1932   70
         Philalanka anomphala Vermeulen, Liew & Schilthuizen, sp. n.   71
         Philalanka rugulosa Vermeulen, Liew & Schilthuizen, sp. n.   73
         Philalanka malimgunung Vermeulen, Liew & Schilthuizen, sp. n.   73
      Genus Thysanota Albers 1860   74
         Thysanota conula (Blanford, 1865)   75
         Thysanota grenvillei (Brazier, 1876)   76
   Family EUCONULIDAE Baker   77
      Genus Kaliella Blanford, 1863   78
         Kaliella microconus (Mousson, 1865)   78
         Kaliella humilis (Tillier & Bouchet, 1988)   81
         Kaliella nephelophila (Tillier & Bouchet, 1988)   82
         Kaliella kinabaluensis (Tillier & Bouchet, 1988)   84
         Kaliella dendrophila (Van Benthem Jutting, 1950)   84
         Kaliella gregaria (Tillier & Bouchet, 1988)   85
         Kaliella eurytrochus Vermeulen, Liew & Schilthuizen, sp. n.   86
         Kaliella sublaxa Vermeulen, Liew & Schilthuizen, sp. n.   87
         Kaliella phacomorpha Vermeulen, Liew & Schilthuizen, sp. n.   90
         Kaliella punctata Vermeulen, Liew & Schilthuizen, sp. n.   91
         Kaliella calculosa (Gould, 1852)   93
         Kaliella microsoma Vermeulen, Liew & Schilthuizen, sp. n.   95
         Kaliella barrakporensis (Pfeiffer, 1852)   96
         Kaliella accepta (E.A. Smith, 1895)   99
         Kaliella scandens (Cox, 1871)   101
         Kaliella dendrobates (Tillier & Bouchet, 1988)   104
         Kaliella doliolum (Pfeiffer, 1846)   105
      Genus Rahula Godwin Austen, 1907   106
         Rahula delopleura Vermeulen, Liew & Schilthuizen, sp. n.   107
   Family PUNCTIDAE Morse   108
      Genus Paralaoma Iredale, 1913   109
         Paralaoma angusta Vermeulen, Liew & Schilthuizen, sp. n.   109
   Family SUBULINIDAE Fischer & Crosse   110
      Genus Curvella Chaper 1885   110
         Curvella hadrotes Vermeulen, Liew & Schilthuizen, sp. n.   111
   Family TROCHOMORPHIDAE Von Möllendorff   111
      Genus Trochomorpha Albers, 1850   112
         Trochomorpha trachus Vermeulen, Liew & Schilthuizen, sp. n.   112
         Trochomorpha rhysa Tillier & Bouchet, 1988   114
         Trochomorpha haptoderma Vermeulen, Liew & Schilthuizen, sp. n.   114
         Trochomorpha thelecoryphe Vermeulen, Liew & Schilthuizen, sp. n.   116
      Genus Geotrochus Van Hasselt, 1823   117
         Geotrochus paraguensis (E.A. Smith, 1893)   118
         Geotrochus labuanensis (Pfeiffer, 1863)   120
         Geotrochus kinabaluensis (E.A. Smith, 1895)   121
         Geotrochus oedobasis Vermeulen, Liew & Schilthuizen, sp. n.   122
         Geotrochus conicoides (Metcalfe, 1851)   123
         Geotrochus spilokeiria Vermeulen, Liew & Schilthuizen, sp. n.   125
         Geotrochus scolops Vermeulen, Liew & Schilthuizen, sp. n.   126
         Geotrochus kitteli Vermeulen, Liew & Schilthuizen, sp. n.   127
         Geotrochus whiteheadi (E.A. Smith, 1895)   129
         Geotrochus subscalaris Vermeulen, Liew & Schilthuizen, sp. n.   129
         Geotrochus meristotrochus Vermeulen, Liew & Schilthuizen, sp. n.   131

Acknowledgements   132
References   132

Customer Reviews