The members of this complex are known to hybridize in captivity, The Central American clade can potentially be split further, with " panamensis " and " tresmariae " recognized as two monotypic species.
22.
It has two allopatric subspecies, both sometimes considered separate monotypic species : The "'Griscom's antwren "'( " M . ( i . ) ignota " ) is found the canopy of humid lowland forests.
23.
While some authorities consider it a full-fledged monotypic species in the genus " Eudorcas ", it is often considered a subspecies of Thomson's gazelle, while other authorities regard it as subspecies of the red-fronted gazelle.
24.
Nevertheless, there are unresolved issues within the genus, and for example the taxon " forstenii " has been considered a subspecies of " M . freycinet ", a subspecies of " M . cumingii ", or a monotypic species.
25.
In contrast, " anerythra " is highly distinctive ( lacks red to the wings, but has some reddish to the belly ) and it has been recommended it should be treated as a separate, monotypic species found between the Xingu River and Tocantins Araguaia River.
26.
Though most recent authorities treat the silver dik-dik as a monotypic species, the silver dik-dik has been suggested as a subspecies of the Swayne's dik-dik ( itself now usually treated as a subspecies of the Salt's dik-dik " ).
