The Borneo Suckers

RM 180.00

The systematics of the genera Gastromyzon, Hypergastromyzon and Neogastromyzon of the family Balitoridae, all of which are endemic to Borneo, are revised. These genera possess an increased number and enlarged size in the pectoral and pelvic fins, fused pelvic fins and dorso-ventrally flattened bodies. They live in the headwater and hillstreams, typically in fast-flowing water over a rocky substratum. All type material of the 21 known species of Gastromyzon is re-described, with another 15 new species described. The genus Gastromyzon, now with 36 species, is divided into 11 artificial species groups: Gastromyzon borneensis group, G. punctulatus group, G. fasciatus group, G. contractus group, G. ctenocephalus group, G. lepidogastergroup, G. ridens group, G. danumensis group, G. pariclavisgroup, G. ocellatusgroup and G. auronigrus group. The status of G. borneensis and G. lepidogaster is resolved with fresh topotypical material. The taxonomy of G. borneensisG. danumensis, G. fasciatus, G. lepidogaster and G. punctulatus is clarified with fresh material and material from a wider distribution. A lectotype is designated for G. monticola. The life colouration of 26 species of Gastromyzon is illustrated, together with line drawings of juveniles of 15 species.

The genus Neogastromyzon is also revised and the identities of the two known species clarified and another four new species are described. All type material is illustrated, with life colouration of 3 species. A brief diagnosis of Hypergastromyzon is also included. An artificial key is provided for all species of Gastromyzon, Hypergastromyzon and Neogastromyzon. The biogeographical, ecological observations and biology of these balitorids are compiled and presented.

  • INTRODUCTION
  • Exploration in Borneo and fish reports
  • BIOGEOGRAPHICAL OBSERVATIONS
  • Distribution of Gastromyzon, Neogastromyzon and Hypergastromyzon in Borneo
  • Patterns
  • Species restricted to single basins
  • Biogeographic patterns
  • Gastromyzon borneensis group of northern Borneo
  • Gastromyzon lepidogaster group
  • Cryptospecies and Species pairs
  • ECOLOGICAL OBSERVATIONS
  • Compilation of observations
  • Observations on locomotion
  • Observations on diet
  • Observations on reproductive characters
  • ECONOMIC VALUE
  • Aquarium fish trade
  • BORNEAN ENDEMIC FISH GENERA AND SPECIES
  • Food fish use (local recipes)
  • Vernacular names
  • Localities in Borneo
  • Sabah localities
  • Brunei localities
  • Sarawak localities
  • Kalimantan Barat localities
  • Kalimantan Tengah localities
  • Kalimantan Timur localities
  • MATERIAL AND METHODS
  • Material
  • Methods
  • TAXONOMY
  • Key to Gastronlyzon, Hypergastromyzon and Neogastromyzon Gastmmyzon GUnther, 1874
  • Species groups
  • Gastmmyzon borneensis group
  • Gastromyzon borneensis Guenther, 1874
  • Gastromyzon monticola (Vailiant, 1889)
  • Gastromyzon ornaticauda Tan & Martin-Smith, 1998
  • Gastromyzon cranbrooki, Tan & Zohrah, 2006
  • Gastromyzon cornusaccus, new species
  • Gastromyzon extrorsus, new species
  • Gastromyzon introrsus, new species
  • Gastronyzon bario, new species
  • Gastromyzon punctulatus group
  • Gastronzyzon punctulatus Inger & Chin, 1961
  • Gastromyzon aeroides, Tan & Zohrah, 2006
  • Gastromyzon katibasensis, Leh & Chai, 2003
  • Gastromyzon fasciatus group
  • Gastromyzon.fasciatus Inger & Chin, 1961
  • Gastromyzon praestczns, new species
  • Gastromyzon contractus group
  • Gastromyzon contractus Roberts, 1982
  • Gastromyzon megalepis Roberts, 1982
  • Gastromyzon umbrus, new species
  • Gastromyzon ctenocephalus group
  • Gastromyzon ctenocephalus Roberts, 1982
  • Gastromyzon scitulus, Tan & Leh, 2006
  • Gastromyzon lepidogaster group
  • Gastromyzon lepidogaster Roberts, 1982
  • Gastromyzon psiloetron, new species
  • Gastromyzon ridens group
  • Gastromyzon ridens Roberts, 1982
  • Gastromyzon crenastus, Tan & Leh, 2006
  • Gastromyzon stellatus, new species
  • Gastromyzon zebrinus, new species
  • Gastromyzon danumensis group
  • Gastromyzon danumensis Chin & Inger, 1989
  • Gastromyzon aequabilis, new species
  • Gastromyzon ingeri, new species
  • Gastmmyzon pariclavis group
  • Gastrotnyzon pariclavis Tan & Martin-Smith, 1998
  • Gastromyzon embalohensis Rachmatika, 1998
  • Gastromyzon venustus, Tan & Zohrah, 2006
  • Gastmnzyzon speetabilis, new species
  • Gastromyzon russulus, new species
  • Gastromyzon viriosus, new species
  • Gastromyzon ocellatus group
  • Gastromyzon ocellatus, Tan & Ng, 2004
  • Gastromyzon ftirragus, Tan & Leh, 2006
  • Gastromyzon auronigrus group
  • Gastromyzon auronigrus, new species
  • Neogastromyzon Popta, 1905
  • Neogastromyzon nieuwenhuisii group
  • Neogastromyzon nieuwenhuisii Popta, 1905
  • Neogastromyzon pauciradiatus (Inger & Chin, 1961)
  • Neogastromyzon crassiobex, new species
  • Neogastromyzon chini, new species
  • Neogastromyzon kottelati, new species
  • Neogastromyzon brunei, new species
  • INCERTA SEDIS
  • Neogastromyzon sp. `Baram’
  • Hypergastromyzon Roberts, 1989
  • Hypergastromyzon humilis Roberts, 1989
  • Hypergastronzyzon eubranchus Roberts, 1991
  • Literature cited
  • Acknowledgements
  • Plates
  • Index
Weight 1 kg
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