The speckled chub (Macrhybopsis aestivalis) complex was long considered a wide-ranging polytypic
species with six subspecies.
species revisited: morphological differentiation among tiger salamanders (Ambystoma tigrinum) (Amphibia: Caudata).
There is legitimate concern that these hatchery introductions might disrupt fish stocks finely adapted to local habitat characteristics; there is concern to protect the genetic integrity of locally adapted stocks, sometimes recognized as local subspecies of more widely distributed polytypic
species (Allendorf and Leary, 1988; Behnke, 1992; Hilborn, 1992).
However, the plasma cells are cytologically bland and express polytypic
immunoglobulin light chains unlike a plasma cell neoplasm.
torquatus of northern South America, and the highly polytypic
and broadly distributed B.
In , for example, the formation of two-dimensional electron gases (2DEGs) at polytypic
(hexagonal/cubic) SiC heterojunctions (4H/3C SiC and 6H/3C SiC) is investigated by numerical self-consistent solutions of the Schrodinger and Poisson equations.
The taxonomic history of members of the genus in the contiguous 48 states has ranged from as many as 10 species (Howell 1906) to their synonymy into one polytypic
A poorly known Neotropical genus, Microbates is composed of two allopatric and polytypic
species (Olson 1980, Atwood and Lerman 2006).
The interfollicular area is usually expanded, but may have a "washed-out" appearance because there are relatively few lymphocytes and relatively many histiocytes and polytypic
marmoratus be treated as a subspecies of one polytypic
species (Cnemidophorus tigris).
If all reports for a polytypic
genus specify the same state, but there is no report for the exemplar species in the analysis, the exemplar species is scored as having the state reported for the genus.
The Warbling Antbird (Hypocnemis cantator) was considered a widespread polytypic
species (Zimmer and Isler 2003), but recently it has been split into six different species based on genetic, vocal, and plumage coloration differences among populations (Bates et al.