Morphology and phylogeny of the testate amoebae Euglypha bryophila Brown, 1911 and Euglypha cristata Leidy, 1874 (Rhizaria, Euglyphida)

Shallow-marine testate amoebae with internal structures from the Lower Devonian of China

“…The euglyphid testate amoebae can be easily distinguished from Cangwuella on the basis of shell wall. Most of these euglyphid amoebae are characterized by siliceous scales with different shape, size and arrangement, 36 , 37 , 38 , 39 whereas such structure is not shown in any of our specimens. Shells without scales indeed occur in Euglyphida, as represented by the genera Ovulinata and Micropyxidiella of Paulinellidae, 40 , 41 but they are much smaller (normally less than 20 μm in diameter) than Cangwuella .…”

A reassessment of testate amoebae diversity in Tierra del Fuego peatlands: Implications for large scale inferences

“…This is common practice in palaeoecological studies where shells are often not very well preserved (Amesbury et al, 2016). We also found three species similar to the former ones in the same peat bog, for which the shape of the anterior thickening of apertural plates and its denticulation -a trait used to discriminate among Euglypha species (Tsyganov et al, 2017)-did not correspond with the original description of any known species. (e. g.…”

“…Indeed, we believe that identification may in many cases suffer from force-fitting (i. e. forcing the identification of morphotypes to the descriptions in the most common literature) which overestimates the geographical range of many species and underestimates local endemism. This is particularly evident in Euglyphida, for which scanning electronic microscopic imaging is often needed to observe diagnostic traits (Chatelain et al, 2013;Tsyganov et al, 2017).…”

“…Indeed, there is a lack of consensus on species val Furthermore, taxonomic uncertainties are a major issue in testate amoebae biogeography . Indeed, there is a lack of consensus on species val (Chatelain et al, 2013;Tsyganov et al, 2017) evident in Euglyphida, for which scanning electronic microscopic imaging (Chatelain et al, 2013;Tsyganov et al, 2017) geographical range of many species and underestimates local endemism. evident in Euglyphida, for which scanning electronic microscopic imaging morphotypes to the descriptions in the most common literature) which overestimates the geographical range of many species and underestimates local endemism.…”