This is a taxonomically difficult group of very similar species.

There are an estimated 4,000 species (about 2,600 taxonomically known).

Most, if not all organisms can be placed taxonomically into these categories.

Taxonomically they are in need of a modern revision.

There are around 27 subspecies of this taxonomically complex bird.

But these are generally also not considered to be taxonomically distinct today:

The difference is not a formal one taxonomically and there are numerous exceptions to this rule.

At the top level, people do it for the intellectual love of mushrooms - to try to understand them taxonomically and chemically.

Taxonomically speaking, "invertebrate" is no more than a term of convenience.

This genus was established after a major taxonomically revision of frogs.

What it included was everybody, living or dead, who was taxonomically human and born before that first year of Gateway.

As with other taxonomically difficult groups, ectoparasites can give information on relationships.

This section represents a natural group and are taxonomically monophyletic.

Fixing such a name-bearing type should only be done if this is taxonomically necessary (Art.

Their lack of description makes it difficult to know exactly which taxonomically correct whales these names might refer, if any.

However some scientists consider them "taxonomically equivalent to subspecies".

It has not yet been formally described taxonomically.

Also wide-ranging taxonomically, it represents 27 orders, 129 families, and 850 genera.

The collection is a resource for economically, biographically, and taxonomically important groups of fungi.

The combination of these features taxonomically place the organism into the family Kathlaniidae.

Ponies are taxonomically the same animals as horses.

Because of Chlamydia's unique developmental cycle, it was taxonomically classified in a separate order.

Invertebrates can be classified in 9 main categories, some of which are taxonomically obsolescent.

Therefore these terms are not taxonomically specific.

Speckled Teal has been divided taxonomically into two species.