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7
100%
Sylwan
|
2001
|
tom 145
|
nr 03
93-101
8
100%
Mexican Pliocene cervids are very poorly known. We report on new fossil material of the roe deer Capreolus constantini recovered from the Pliocene Atotonilco El Grande Formation of Santa Maria Amajac, Hidalgo (central Mexico). The specimens were collected from a series of layers of friable to moderately indurated polymictic conglomerate supported by a sandstone-tuffaceous-calcareous matrix. This species was formerly known only from the late Pliocene of Udunga, Russia, thus implying a dispersal event to North America around 4.0 Ma. This cervid is one of the very small number of mammals recorded from the poorly sampled Pliocene temperate deposits of Mexico.
In some families of large mammals (Cervidae, Bovidae, Canidae), we examined relationships between the various mating systems adopted and biochemical-genetic variation measured in terms of the mean proportion of polymorphic loci (P), mean heterozygosity (H) and derived coefficients, such as the ratio Pt:P and FIS. Our hypothesis was that genetic variability decreases as the degree of polygyny of the mating system adopted increases. Most of the data were in accordance with this prediction, but also some ambiguous results could be observed. Methodological and practical difficulties connected with our synoptical approach, such as the lack of comparability among most electrophoretic studies and the general scarcity of quantitative behavioural data are critically discussed.
Investigation of cervid nomenclature has revealed unavailable or preoccupied names still in use; unnoticed or unevaluated homonymy; unused or unnoticed names, including senior synonyms; unnoticed or misidentified types of genera; miscited authorship; unjustified emendations of original spelling; and corrections of nomenclatural errors that have been neglected in subsequent literature. The following names appearing in recent literature are affected: Pliocervinae Khomenko, Neocervinae, Gervulinae (unavailable names); Capreoiinae, Atceinae. Rangiferinae (attributable to Brookes, 1828, not to authors who changed their rank or corrected original speiling; take precedence over Odocoileinae when the taxa are combined, contrary to common practice); Alcinae (emendation due to Blyth, not Jerdon, now superseded by Alceinae, with priority over Rangiferinae - where relevant - here designated); Muntiacinae (author is Knottnerus-Meyer, 1907, not Pocock, 1923; Elaphodinae here designated a junior synonym); Megacerinae Viret (preoccupied by Megaloceridae Brookes, emended to Megalocerotinae); Blastocerus Wagner (an available name of which Blastóceras Fitzinger is an unjustified emendation, not a senior synonym of Ozoloceras; lectotype confirmed to he C'emus paludosas Desmarest, 1822); Dorcetaphus (junior synonym of Odocoileus, not a senior synonym of Blastocerus)', Mazama goitazoubira, Muntiacus feat, Pudu pudu {unjustified emendations); Ceruus japonicus Otsuka, 1967 (preoccupied, new name proposed); Ceruus elaphus montanus Botezat, 1903 (mimen nudum and preoccupied); and Pseudodama (preoccupied by Metaceruocerus),
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