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Microtia parva

Mammalia - Rodentia - Muridae

Taxonomy
Microtia parva was named by Freudenthal (1976). It is not extant. Its type specimen is RGM 194344, a maxilla (sin with M1-M3). Its type locality is Biancone, which is in a Vallesian/Turolian fissure fill limestone in Italy.

Synonymy list
YearName and author
1976Microtia parva Freudenthal p. 4 figs. Pl. 2, fig. 4

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
OlfactoresJefferies 1991
subphylumVertebrata
Gnathostomata()
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
Anthracosauria
Batrachosauria()
Cotylosauria()
Amniota
Synapsida()
Therapsida()
RankNameAuthor
infraorderCynodontia()
Epicynodontia
infraorderEucynodontia
Probainognathia
Mammaliamorpha
Mammaliaformes
classMammalia
subclassTribosphenida()
infraclassEutheria()
Placentalia
EuarchontogliresMurphy et al. 2001
Glires()
orderRodentia
infraorderMyodontaSchaub 1958
superfamilyMuroideaIlliger 1811
Eumuroida
familyMuridaeIlliger 1811
genusMicrotia
speciesparva

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

Diagnosis
ReferenceDiagnosis
M. Freudenthal 1976Considering its upper M1 M. parva could be considered as a large Stephanomys. The lower molars are not like those of Stephanomys. They resemble a common murid like Parapodemus, though some alterations are definitely recognizable. m1 is made up of three crests plus an anterior cusp that may be simple or split (level 3 1/2 to 4 as defined in the chapter on quantified morphology). A mesolophid is often present between the posterior two crests. The anterior cusp may be connected to the next crest by one longitudinal ridge, or by two such ridges separated by a small funnel. M3 consists of three ridges: t1, t4-5, and t7-9 (see Thaler, 1966, p. 116). In some cases t7-t9 shows a shallow sinus in the lingual wall, that indicates the possibility of a further subdivision. The teeth are moderately hypsodont. The vertical enamel plate on the labial side of the molars is hardly present. m1 has two roots, M3 has two or three roots.