Arcella peruviana sp. nov. (Amoebozoa: Arcellinida, Arcellidae), a new species from a tropical peatland in Amazonia

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• 作者：Monika K. Reczuga^a ; ^b ; ^c ; ^{m.reczuga@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; Graeme T. Swindles^d ; Łukasz Grewling^e ; Mariusz Lamentowicz^a ; ^b
• 关键词：Microbial diversity ; Peatlands ; Protist distribution ; Rainforest ; Testate amoebae ; Tropics
• 刊名：European Journal of Protistology
• 出版年：2015
• 出版时间：October 2015
• 年：2015
• 卷：51
• 期：5
• 页码：437-449
• 全文大小：2812 K

文摘

There has only been one study on the ecology of testate amoebae from Amazonian peatlands, despite Amazonia being a biodiversity hotspot of global importance. During analysis of litter samples from Aucayacu peatland, western (Peruvian) Amazonia, we discovered a testate amoeba with a distinct morphology unlike any other species reported previously. We describe a new species, Arcella peruviana, based on its distinct morphology, compare it to morphologically similar species and provide information about its ecology. This new species is characterised by a distinct cruciform aperture (diameter ranges between 12 and 17 μm) which is slightly invaginated. The test is small (height 43–57 μm) and polygonal in cross-section. Our discovery suggests the existence of an unknown diversity of testate amoebae in Amazonia. The absence of the new Arcella species in more intensively-sampled regions supports the view that protists have restricted distributions.