In general, specializations of the gut accompany herbivorous habits.
The subsequent evolutionary sequence led to losses and specializations of the incisors and canines.
Species and also genera of araneomorph spiders are usually separated by specializations of the female epigynum and male pedipalp.
The eye, the ear, the tongue, and the nose all evolved from invaginations and specializations of the skin.
Groups of reptiles whose modes of life came to depend heavily on passive defense also developed specializations of the skeleton.
Even the most primitive atheriniforms in the suborder Cyprinodontoidei show the usual reproductive specializations of the group: sexual dimorphism and complex behaviour patterns in courtship and spawning.
Less obvious but especially significant are numerous skull features, specializations of the Weberian apparatus in otophysans, configuration of the swim bladder, and fusions of vertebral elements.
The muscles that distinguish animals from plants or fungi are specializations of the actin and myosin microfilaments common to all eukaryotic cells.
To determine relationships within the Strigiformes, taxonomists utilize features of the skull and the sternum, relative specializations of the eye and ear, and the development of the facial disk.
Therefore, either the primates, colugos, and all bats shared a common ancestor with those specializations of the visual system, which the Microchiroptera then lost, or these features were developed independently by (1) primates and colugos and (2) Megachiroptera.
Other specializations of the mammalian skull include paired articulating surfaces at the neck (occipital condyles) and an expanded nasal chamber with complexly folded turbinal bones, providing a large area for detection of odours.
