PBDB Taxon

Basic info	Taxonomic history	Classification	Included Taxa
Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Leptictis montanus

Osteichthyes - Leptictidae

Taxonomy

Ictops montanus was named by Douglass (1905).

It was recombined as Leptictis montanus by Novacek (1976).

Synonyms

Ictops intermedius was named by Douglass (1905).

It was synonymized subjectively with Leptictis montanus by Novacek (1976); it was recombined as Leptictis intermedius by Korth (2022).
Ictops tenuis was named by Douglass (1905).

It was synonymized subjectively with Leptictis montanus by Novacek (1976).

Synonymy list

Year	Name and author
1905	Ictops intermedius Douglass
1905	Ictops montanus Douglass
1905	Ictops tenuis Douglass
1930	Ictops intermedius Hay p. 430
1930	Ictops montanus Hay p. 430
1930	Ictops tenuis Hay p. 430
1976	Leptictis montanus Novacek p. 9
2022	Leptictis intermedius Korth p. 313

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Deuterostomia
phylum	Chordata	Haeckel 1874
subphylum	Vertebrata
superclass	Gnathostomata
class	Osteichthyes
subclass	Sarcopterygii	()
subclass	Dipnotetrapodomorpha	(Nelson 2006)
subclass	Tetrapodomorpha	()
—	Tetrapoda
—	Reptiliomorpha
—	Anthracosauria
subclass	Amphibiosauria	Kuhn 1967
—	Cotylosauria	()
—	Amniota

Rank	Name	Author
subclass	Synapsida
—	Therapsida	()
infraorder	Cynodontia	()
—	Mammaliamorpha
—	Mammaliaformes
class	Mammalia
—	Cladotheria
—	Zatheria
subclass	Tribosphenida	()
subclass	Theria
—	Eutheria	()
superorder	Leptictida
family	Leptictidae	Gill 1872
subfamily	Leptictinae	Gill 1872
genus	Leptictis	Leidy 1868
species	montanus	()

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.

†Leptictis montanus Douglass 1905

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Invalid names: Ictops intermedius Douglass 1905 [synonym], Ictops tenuis Douglass 1905 [synonym]

Diagnosis

Reference	Diagnosis
W. W. Korth 2022 (Leptictis intermedius)	Small species; zygomatic arch deeper than in L. dakotensis, narrower than in “L.” montanus; squamosal sinus canal single, large crescentic opening (not multiple, small foramina); suprameatal foramen small (not as en- larged as in L. dakotensis); distinct flange along posterior margin of squamosal and parietal (the ventral end of the nuchal crest); entoconulid generally present on p5–m3; precingula on P5–M3 thin and short, not reaching lingual margin of tooth; P4 anteroposteriorly elongated relative to P5; reduced ectocingulum on P4 (narrow, only on poste- rior two–thirds of tooth length); P5 with distinct hypocone but smaller than on M1–M2; paraconule more lingual than metaconule on P5–M3 and transversely elongated; metacone moderately to well developed on M3.

Measurements

No measurements are available

Composition:

phosphaticsubp

Environment:

terrestrialsubc

Locomotion:

actively mobilec

Life habit:

ground dwellingf

Diet:

insectivoref

Diet 2:

carnivoref

Reproduction:

viviparoussubc

Created:

2011-04-16 19:28:33

Modified:

2011-04-16 04:29:22

Source: f = family, subc = subclass, c = class, subp = subphylum

References: Meehan and Martin 2010, Lillegraven 1979, Ji et al. 2002, Hendy et al. 2009, Carroll 1988

Age range: Chadronian or 37.00000 to 33.90000 Ma

Collections: one only

Time interval	Ma	Country or state	Original ID and collection number
Chadronian	37.0 - 33.9	USA (Montana)	Ictops montanus, Leptictis montanus (16990)