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Reference.org
Allen's swamp monkey
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<p>The Allen's swamp monkey (<i>Allenopithecus nigroviridis</i>) is a species of <a href="/facts/Old_World_monkey/hrhKhgt7">Old World monkey</a> and the <a href="/facts/Monotypic_taxon/QvoM9aGP">only member</a> of the genus <i>Allenopithecus</i>. Phylogenetically, it is a sister <a href="/facts/Clade/XefyYmWn">clade</a> to the <a href="/facts/Guenon/fUmWCaAI">guenons</a>, but differs in dentition and habits. </p><p>Allen's swamp monkey was named after American zoologist <a href="/facts/Joel_Asaph_Allen/yKTlVbdl">Joel Asaph Allen</a>. </p>