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Mictomys (bog lemming)
Taxonomy
Mictomys was named by True (1894) [also attributed to Baird 1857]. It is extant. Its type is Mictomys innuitus.
It was synonymized subjectively with Synaptomys by Merriam (1896), Miller (1896), Preble (1899), Bangs (1900), Howell (1927), Zakrzewski (1972), Martin (1979), Kurten and Anderson (1980), Hall (1981), Martin (1989), Voorhies and Voorhies (1991), Dalquest and Schultz (1992); it was reranked as Synaptomys (Mictomys) by Seymour (2004).
It was assigned to Cricetidae by True (1894), von Koenigswald and Martin (1984), Repenning (1992), Wood and Barnosky (1994), Repenning et al. (1995), McKenna and Bell (1997), Fejfar and Repenning (1998), Albright (1999); to Synaptomys by Seymour (2004); and to Arvicolinae by Eshelman et al. (2025).
It was synonymized subjectively with Synaptomys by Merriam (1896), Miller (1896), Preble (1899), Bangs (1900), Howell (1927), Zakrzewski (1972), Martin (1979), Kurten and Anderson (1980), Hall (1981), Martin (1989), Voorhies and Voorhies (1991), Dalquest and Schultz (1992); it was reranked as Synaptomys (Mictomys) by Seymour (2004).
It was assigned to Cricetidae by True (1894), von Koenigswald and Martin (1984), Repenning (1992), Wood and Barnosky (1994), Repenning et al. (1995), McKenna and Bell (1997), Fejfar and Repenning (1998), Albright (1999); to Synaptomys by Seymour (2004); and to Arvicolinae by Eshelman et al. (2025).
Synonymy list
| Year | Name and author |
|---|---|
| 1894 | Mictomys True |
| 1984 | Mictomys von Koenigswald and Martin |
| 1992 | Mictomys Repenning |
| 1994 | Mictomys Wood and Barnosky |
| 1995 | Mictomys Repenning et al. |
| 1997 | Mictomys McKenna and Bell |
| 1998 | Mictomys Fejfar and Repenning |
| 1999 | Mictomys Albright |
| 2004 | Synaptomys (Mictomys) Seymour |
| 2025 | Mictomys Eshelman et al. p. 108 |
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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.
G. Mictomys True 1894 [bog lemming]
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Mictomys borealis Richardson 1828 [northern bog lemming]
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Invalid names: Mictomys innuitus True 1894 [synonym], Synaptomys andersoni Allen 1903 [synonym], Synaptomys bullatus Preble 1902 [synonym], Synaptomys chapmani Allen 1903 [synonym], Synaptomys dalli Merriam 1896 [synonym], Synaptomys sphagnicola Preble 1899 [synonym], Synaptomys truei Merriam 1896 [synonym], Synaptomys wrangeli Merriam 1896 [synonym]
†Mictomys kansasensis Hibbard 1952
†Mictomys meltoni Paulson 1961
†Mictomys vetus Wilson 1933
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Invalid names: Synaptomys anzaensis Zakrzewski 1972 [synonym], Synaptomys landesi Hibbard 1954 [synonym]
Diagnosis
No diagnoses are available
Measurements
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| Source: o = order, subc = subclass, c = class, subp = subphylum | |||||
| References: Ji et al. 2002, Nowak 1999, Carroll 1988, Hendy et al. 2009, Lillegraven 1979 | |||||
Age range
Maximum range based only on fossils: base of the Gelasian to the top of the Holocene or 2.58000 to 0.00000 Ma
Minimum age of oldest fossil (stem group age): 1.8 Ma
Minimum age of oldest fossil (stem group age): 1.8 Ma
Collections (81 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Blancan | USA (California) | Mictomys anzensis (20120) | |
| Blancan | USA (Nebraska) | Mictomys vetus (19964) | |
| Blancan | USA (Wyoming) | Mictomys vetus (20068) | |
| Blancan | USA (Idaho) | Mictomys vetus (19769 19773 19774 19776 19777 19780 19795 19798 19799 19915 19916 19919) Synaptomys vetus (19910 19911 19912 19913 19917) | |
| Blancan | USA (Arizona) | Mictomys vetus (19646) Synaptomys vetus (19658) | |
| Gelasian | USA (Kansas) | Synaptomys landesi (19927) | |
| Early/Lower Pleistocene | Canada (Yukon) | Mictomys sp. (74472) | |
| Pleistocene | USA (West Virginia) | Synaptomys borealis (125941) | |
| Irvingtonian | USA (Kansas) | Mictomys kansasensis (20562) Synaptomys borealis (20312 20313) Synaptomys kansasensis (20333 20391 20426 20427) Synaptomys meltoni (20293 20301 20352 20567) | |
| Irvingtonian | USA (Maryland) | Synaptomys borealis, Mictomys sp. (20302) | |
| Irvingtonian | USA (Nebraska) | Mictomys sp. (20154) Synaptomys meltoni (20138 20523) | |
| Irvingtonian | USA (New Mexico) | Mictomys kansasensis (20504 20505 20506 20511) Mictomys sp. (20507 20510) | |
| Irvingtonian | USA (Colorado) | Mictomys meltoni (20477) Mictomys vetus (20410) | |
| Irvingtonian | USA (West Virginia) | Mictomys borealis (20286) | |
| Irvingtonian | USA (Texas) | Mictomys meltoni (20163 20306 20413) | |
| Irvingtonian | USA (Utah) | Mictomys sp. (20406) | |
| Irvingtonian | USA (South Dakota) | Mictomys sp. (20503) Synaptomys kansasensis (20389) | |
| Irvingtonian | USA (Iowa) | Mictomys sp. (20408) Synaptomys meltoni (20407) | |
| Irvingtonian | Canada (Saskatchewan) | Synaptomys kansasensis (20563) | |
| Irvingtonian | USA (Nevada) | Mictomys meltoni (20280) | |
| Irvingtonian | USA (California) | Mictomys anzensis (20125) Synaptomys kansasensis (20319) | |
| Middle Pleistocene | USA (Colorado) | Synaptomys meltoni (20369) | |
| Middle Pleistocene | USA (Virginia) | Synaptomys borealis (104662) | |
| Rancholabrean | USA (Michigan) | Mictomys borealis (70130) | |
| Rancholabrean | USA (Utah) | Mictomys borealis (20534) | |
| Late/Upper Pleistocene | USA (Virginia) | Synaptomys borealis (103991 104666 104697 124089) | |
| Late/Upper Pleistocene (high glacial) | Canada (Alberta) | Synaptomys borealis (93528) | |
| Late/Upper Pleistocene | USA (West Virginia) | Synaptomys borealis (93332 123868 124198 124199 124950) | |
| Late/Upper Pleistocene (late glacial) | USA (Ohio) | Synaptomys borealis (93334) | |
| Late/Upper Pleistocene - Holocene | USA (Virginia) | Synaptomys borealis (104034 104035 104672) | |
| Holocene | USA (Montana) | Synaptomys borealis (162133) | |
| Holocene | USA (Virginia) | Synaptomys borealis (104040) |