Pelomedusa仅沼泽侧颈一种，没韧带。
普通沼泽Pelomedusa subrufa subrufa

http://s16/bmiddle/91337d6fgb77ec17ca9cf&690

http://s12/bmiddle/91337d6fgb77ec1987ddb&690

北非沼泽Pelomedusa subrufa olivacea
http://s6/middle/91337d6fgb77ec4f83d05&690

http://s3/middle/91337d6fg78bfe081bcf2&690

http://s8/middle/91337d6fg78bfe0824aa7&690

南非沼泽Pelomedusa subrufa nigra

http://s11/bmiddle/91337d6fgb77ed0010b6a&690

http://s2/bmiddle/91337d6fgb77ed0172a81&690

Pelusiosr的胸盾和腹盾间有韧带。可根据腹甲形态分三类。
短腹盾类（Pelusios adansonii组）：腹甲前叶是腹盾长的2到2.5倍，包括白胸侧颈Pelusios adansonii, 肯尼亚泥龟P. broadleyi, 森林泥龟P. gabonensis, 马氏泥龟P. marani 和 侏儒泥龟P. nanus
长腹盾类（Pelusios castaneus组）：腹甲前叶是腹盾长长的1到1.5倍，包括棱背泥龟P. carinatus, 西非P. castaneus, 黄腹泥龟P. castanoides. 中非P. chapini, P. cupulatta, 黑泥龟P. niger, 多变泥龟P. rhodesianus, 塞舌尔P. seychellensis, 锯齿泥龟P. sinuatus, 和威氏泥龟P. williamsi
8字腹类（Pelusios subniger组）：也“长腹盾”，但腹甲总体近似“8”字形，包括欧卡芬哥泥龟Pelusios bechuanicus, 东非侧颈P. subniger 和乌彭巴泥龟P. upembae.

http://s15/bmiddle/91337d6fgb77ed2a6a78e&690

白胸（安式）Pelusios adansonii

http://s12/bmiddle/91337d6fg78bfe224bcdb&690

http://s2/bmiddle/91337d6fgb77ed59b9731&690

http://s8/bmiddle/91337d6fgb77ed5b4aa67&690

http://s14/bmiddle/91337d6fgb77ed5bd542d&690

http://s9/bmiddle/91337d6fgb77ed5821038&690

http://s1/bmiddle/91337d6fg78bfe2275360&690

欧卡芬哥泥龟Pelusios bechuanicus

http://s15/bmiddle/91337d6fgb77edb6a65de&690

http://s9/middle/91337d6fgb77edb7c7878&690

http://s4/middle/91337d6fg78bfe2c0e373&690

http://s12/middle/91337d6fgb77edba09e5b&690

http://s6/middle/91337d6fgb77edba9d715&690

http://s4/middle/91337d6fg78bfe2c4ae83&690

肯尼亚泥龟Pelusios broadleyi

http://s3/bmiddle/91337d6fgb77ef6370122&690

http://s12/middle/91337d6fgb77ef5fd3c8b&690

http://s5/bmiddle/91337d6fgb77ef61bc324&690

http://s14/bmiddle/91337d6fgb77ef6289bbd&690

棱背泥龟Pelusios carinatus

http://s8/bmiddle/91337d6fgb77efc595967&690

http://s14/bmiddle/91337d6fgb77efc684cdd&690

http://s3/bmiddle/91337d6fgb77efccb53b2&690

http://s8/bmiddle/91337d6fgb77efcb810d7&690

http://s11/bmiddle/91337d6fgb77efc88789a&690

http://s16/bmiddle/91337d6fgb77efc788d7f&690

http://s12/bmiddle/91337d6fgb77efc9ac07b&690

http://s5/bmiddle/91337d6fgb77efcaa2754&690

西非Pelusios castaneus

http://s5/bmiddle/91337d6fgb77f04743454&690

http://s12/bmiddle/91337d6fgb77f0491a99b&690

http://s10/bmiddle/91337d6fgb77f048e29c9&690

http://s10/bmiddle/91337d6fg78bfe6d7a3c9&690

http://s15/bmiddle/91337d6fgb77f0439c9de&690

http://s16/bmiddle/91337d6fgb77f0447d7af&690

东非黄腹泥龟Pelusios castanoides castanoides

http://s12/bmiddle/91337d6fgb77f0aacb64b&690

http://s6/bmiddle/91337d6fgb77f0aba90e5&690

http://s13/bmiddle/91337d6fgb77f0acf95ac&690

http://s10/bmiddle/91337d6fgb77f0adf93c9&690

http://s16/middle/91337d6fgb77f0afafd7f&690

http://s14/middle/91337d6fgb77f0b0bf0ad&690

塞舌尔黄腹泥龟Pelusios castanoides intergularis

http://s5/bmiddle/91337d6fgb77f19bf5864&690

http://s8/bmiddle/91337d6fgb77f19cf6197&690

http://s11/bmiddle/91337d6fgb77f19ed98ba&690

中非Pelusios chapini

http://s3/bmiddle/91337d6fgb77f1e43e8a2&690

http://s4/bmiddle/91337d6fgb77f1e6b6a53&690

http://s1/bmiddle/91337d6fgb77f1e71d860&690

http://s16/bmiddle/91337d6fgb77f1e80ca3f&690

http://s4/bmiddle/91337d6fgb77f1e9df2b3&690

乌彭巴泥龟Pelusios upembae
http://s11/bmiddle/91337d6fgb77fb2297e5a&690

http://s3/bmiddle/91337d6fgb77fb23cd062&690

http://s13/bmiddle/91337d6fgb77fb25baf9c&690

http://s6/bmiddle/91337d6fgb77fb248c7e5&690

http://s13/bmiddle/91337d6fg78bff835735c&690

威式泥龟（维多利亚湖产）Pelusios williamsi williamsi

http://s10/bmiddle/91337d6fg78bff9e58ba9&690

http://s13/bmiddle/91337d6fgb77fc3074fbc&690

http://s7/middle/91337d6fgb77fc2d02b76&690

http://s3/middle/91337d6fgb77fc2d979c2&690

（艾伯特尼罗河到爱德华湖产）Pelusios williamsi laurenti

http://s5/middle/91337d6fgb77fc83bd1e4&690

http://s10/middle/91337d6fgb77fc80a0bb9&690

http://s10/bmiddle/91337d6fgb77fc814f3d9&690

http://s4/bmiddle/91337d6fgb77fc7d5d583&690

http://s14/middle/91337d6fgb77fc7e4f1ed&690

（维多利亚湖的Ukerewe岛产）Pelusios williamsi lutescens

http://s14/bmiddle/91337d6fgb77fd85bf30d&690

http://s3/bmiddle/91337d6fgb77fd7fb7642&690

http://s16/bmiddle/91337d6fgb77fd8302e8f&690

http://s12/bmiddle/91337d6fgb77fd83fea6b&690

http://s10/bmiddle/91337d6fg78bffc018139&690

http://s1/middle/91337d6fgb77fd821e360&690

http://s2/bmiddle/91337d6fgb77fd8492f81&690

http://s13/bmiddle/91337d6fgb77fd0c2b22c&690

再贴一个稀有程度应该不比亚马逊大头低的Podocnemis lewyana

http://s15/bmiddle/91337d6fgb77fe293b6ee&690

http://s4/bmiddle/91337d6fgb77fe31a8793&690

http://s4/bmiddle/91337d6fgb77fe2f9f393&690

http://s6/middle/91337d6fgb77fe2ef2b95&690

http://s12/bmiddle/91337d6fgb77fe2ab8f3b&690

http://s8/bmiddle/91337d6fgb77fe30712d7&690

http://s13/middle/91337d6fg78bffd1a972c&690

http://s7/middle/91337d6fg78bffd155c16&690