Dormouse

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Dormice
Temporal range: Early Eocene – Recent
Graphiurus spec -murinus-1.jpg
African dormouse, Graphiurus sp.
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Rodentia
Suborder: Sciuromorpha
Family: Gliridae
Muirhead in Brewster, 1819 [1]
Type genus
Glis
Brisson, 1762
Subfamilies and genera

Graphiurinae

Leithiinae

Glirinae

A dormouse is a rodent of the family Gliridae (this family is also variously called Myoxidae or Muscardinidae by different taxonomists). Dormice are nocturnal animals found in Africa, Asia, and Europe. They are named for their long, dormant hibernation period of six months or longer. [2] There are 9 genera and 28 living species of dormice, with half of living species belonging to the African genus Graphiurus. [3]

Contents

Etymology

The word dormouse comes from Middle English dormous, of uncertain origin, possibly from a dialectal element *dor-, from Old Norse dár 'benumbed' and Middle English mous 'mouse'.

The word is sometimes conjectured to come from an Anglo-Norman derivative of dormir 'to sleep', with the second element mistaken for mouse, but no such Anglo-Norman term is known to have existed. [4] [5]

The Latin noun glīs, which is the origin of the scientific name, descends from the Proto-Indo-European noun *gl̥h₁éys 'weasel, mouse', and is related to Sanskrit गिरि (girí) 'mouse' and Ancient Greek γαλέη (galéē) 'weasel'.

Characteristics

Dormice are small rodents, with body lengths between 6 and 19 cm (2.4 and 7.5 in), and weight between 15 and 180 g (0.53 and 6.35 oz). [6] They are generally mouse-like in appearance, but with furred tails. They are largely arboreal, agile, and well adapted to climbing. Most species are nocturnal. Dormice have an excellent sense of hearing and signal each other with a variety of vocalisations. [7]

Dormice are omnivorous, and typically feed on berries, flowers, fruits, insects, and nuts. They are unique among rodents in that they lack a cecum, a part of the gut used in other species to ferment vegetable matter. Their dental formula is similar to that of squirrels, although they often lack premolars:

Dentition
1.0.0–1.3
1.0.0–1.3

Dormice breed once (or, occasionally, twice) each year, producing litters with an average of four young after a gestation period of 22–24 days. They can live for as long as five years. The young are born hairless and helpless, and their eyes do not open until about 18 days after birth. They typically become sexually mature after the end of their first hibernation. Dormice live in small family groups, with home ranges that vary widely between species and depend on the availability of food. [7]

Hibernation

The little dormouse, sleeping in the winter nest. Muscardinus avellanarius - 1700-1880 little dormouse, sleeping in the winter nest.jpg
The little dormouse, sleeping in the winter nest.

One of the most notable characteristics of those dormice that live in temperate zones is hibernation. They can hibernate six months out of the year, or even longer if the weather does not become warm enough, sometimes waking for brief periods to eat food they had previously stored nearby. During the summer, they accumulate fat in their bodies to nourish them through the hibernation period. [7]

Relationship with humans

The edible dormouse (Glis glis) was considered a delicacy in ancient Rome, either as a savoury appetizer or as a dessert (dipped in honey and poppy seeds). The Romans used a special kind of enclosure, a glirarium, to raise and fatten dormice for the table. [7] It is still considered a delicacy in Slovenia and in several places in Croatia, namely Lika, and the islands of Hvar and Brač. [8] [9] Dormouse fat was believed by the Elizabethans to induce sleep since the animal put on fat before hibernating. [10]

In more recent years, [11] dormice have begun to enter the pet trade; however, they are uncommon as pets and are considered an exotic pet. The woodland dormouse (Graphiurus murinus) is the most commonly seen species in the pet trade. [12] Asian garden dormice (Eliomys melanurus) are also occasionally kept as pets. [13]

Evolution

Dormice likely originated in Europe, with the earliest dormouse genus Eogliravus being known from the Early Eocene (around 48-41 million years ago) of France. Dormice were relatively undiverse in the Eocene, but considerably diversified during the Oligocene (34-23 million years ago). Their ability to hibernate may have emerged during this period. They reached an apex of diversity during the late Early Miocene (around 17 million years ago [14] ) when there were 18 genera and 36 species of dormice in Europe alone during this period. [3] During this timespan, dormice represented the dominant group of rodents in Europe. [14] The earliest Asian dormice are known from the early Miocene, and the Miocene saw the emergence of several of the modern genera of living dormice. The diversity of dormice saw continual decline unti the middle Pliocene, when there was again a period of speciation, mostly driven by the diversification of the African Graphiurus , which first appeared during the Pliocene, while the diversity of European dormice remained relatively low compared to their Miocene peak. [3] Several dormouse lineaged experienced insular gigantism after being isolated on islands in the Mediterranean during the Pliocene and Pleistocene, the largest being the rabbit sized Leithia of Sicily and Malta, the largest dormouse ever. [15]

Classification

The family consists of 29 extant species, in three subfamilies and (arguably) nine genera:

Cladogram of most living and recently extinct dormice genera based on mitochondrial DNA after Petrova et al. 2024: [16]

Gliridae  (dormice)
Graphiurinae

Graphiurus (African dormice)

Glirinae

Glirulus (Japanese dormouse)

Glis (edible dormice)

Leithiinae

Muscardinus (hazel dormouse)

Myomimus (mouse-tailed dormice)

Selevinia (desert dormouse)

Dryomys (woolly and forest dormice)

Eliomys (garden dormice)

Hypnomys (Balearic dormice)

Family Gliridae – Dormice

† indicates an extinct species.

Fossil genera and species

Related Research Articles

<span class="mw-page-title-main">European edible dormouse</span> Species of rodent

The European edible dormouse also known as the European dormouse or European fat dormouse is a large dormouse and one of only two living species in the genus Glis, found in most of Europe and parts of western Asia. The common name comes from the Romans, who ate them as a delicacy.

<i>Glis</i> (genus) Genus of rodent

Glis is a genus of rodent that contains two extant species, both known as edible dormice or fat dormice: the European edible dormouse (Glis glis) and the Iranian edible dormouse. It also contains a number of fossil species.

<span class="mw-page-title-main">Hazel dormouse</span> Species of rodent

The hazel dormouse or common dormouse is a small dormouse species native to Europe and the only living species in the genus Muscardinus.

<i>Graphiurus</i> Genus of rodents

The African dormice are dormice that live throughout sub-Saharan Africa in a variety of habitats. They are very agile climbers and have bushy tails. They primarily eat invertebrates, with other components of their diet including small vertebrates, fruit, nuts and eggs. They represent the most diverse living genus of dormice, making up half of all living species.

<i>Eliomys</i> Genus of rodents

Eliomys is a genus of Palaearctic rodents in the family Gliridae, commonly known as garden dormice.

The Lorrain dormouse is a species of rodent in the family Gliridae. It is found in Cameroon, Democratic Republic of the Congo, Ghana, Guinea-Bissau, Liberia, Nigeria, Sierra Leone, Tanzania, and Uganda. Its natural habitats are subtropical or tropical, moist, lowland forests, moist savanna, and plantations.

The masked mouse-tailed dormouse, also called Ognev's mouse-tailed dormouse, is a species of rodent in the family Gliridae. It is found in Iran and Turkmenistan.

<span class="mw-page-title-main">Roach's mouse-tailed dormouse</span> Species of rodent

The Roach's mouse-tailed dormouse or ground dormouse, also known simply as the mouse-tailed dormouse, is a species of rodent in the family Gliridae. It is found in Bulgaria, European Turkey, and Greece.

The desert dormouse is a species of rodent in the dormouse family, Gliridae. This species was formerly placed in its own family, Seleviniidae, but it is now considered to be a dormouse, monotypic within the genus Selevinia. It is endemic to Kazakhstan.

<span class="mw-page-title-main">Leithiinae</span> Subfamily of rodents

Leithiinae is a subfamily of dormice. It is named after the Leithia, an extinct genus of giant dormouse from the Pleistocene of Sicily.

<span class="mw-page-title-main">Forest dormouse</span> Species of rodent

The forest dormouse is a species of rodent in the family Gliridae found in eastern Europe, the Balkans and parts of western Central Asia. It is categorized as being of least concern in the IUCN List of Threatened Species due to its wide range and stable population trend. Forest dormice have a diploid count (2n) of 48 chromosomes. Even though this species lives in a variety of geographic locations, its greatest population density is in the forests of central Moldova, in Transcaucasia, and in the mountains of Central Asia. In most other locations, population density of this species is rather low. Population density is dependent on many factors. But the main features that this species depends on for choosing a location are the presence of the appropriate food sources as well as good foliage that can be used for a habitat. The reason why the forests in central Moldova have the highest population density is they provide the largest diversity of food sources which are available throughout the year. This location also provides the best type of foliage for the forest dormice to build their nests as well as swing from branches. The combination of both of these aspects allows for this species to have its highest needs met. Therefore, during mating season they produce offspring who also stay in the same general area when they mature. It makes sense not to move from an area if it is providing for your most basic needs.

<i>Seorsumuscardinus</i> Genus of fossil dormice from the early Miocene of Europe

Seorsumuscardinus is a genus of fossil dormice from the early Miocene of Europe. It is known from zone MN 4 in Oberdorf, Austria; Karydia, Greece; and Tägernaustrasse-Jona, Switzerland, and from zone MN 5 in a single site at Affalterbach, Germany. The MN 4 records are placed in the species S. alpinus and the sole MN 5 record is classified as the species S. bolligeri. The latter was placed in a separate genus, Heissigia, when it was first described in 2007, but it was reclassified as a second species of Seorsumuscardinus in 2009.

<span class="mw-page-title-main">Affalterbach, Pfaffenhofen an der Ilm</span>

Affalterbach is a village (Ortsteil) of the Bavarian municipality of Pfaffenhofen an der Ilm. There is a fossil site about 800 m northwest of the church; the site has been dated to about 16 million years ago on the basis of the presence of the small rodent Megacricetodon aff. bavaricus and the local stratigraphy. The site also contains the dormice Miodyromys aff. aegercii, Glirulus diremptus, Microdyromys cf. complicatus, Prodryomys satus, cf. Bransatoglis sp., Muscardinus cf. sansaniensis, and Seorsumuscardinus bolligeri.

<i>Hypnomys</i> Extinct genus of giant dormice

Hypnomys, otherwise known as Balearic giant dormice, is an extinct genus of dormouse (Gliridae) in the subfamily Leithiinae. Its species are considered examples of insular gigantism. They were endemic to the Balearic Islands in the western Mediterranean from the Early Pliocene until their extinction around the 3rd millennium BC. They first appeared in the fossil record on Mallorca during the Early Pliocene, presumably as a result to the evaporation of the Mediterranean sea during the Messinian salinity crisis connecting the Balearic Islands with mainland Europe. They later spread to Menorca, and a possible molar is also known from Ibiza. Hypnomys became extinct during the late Holocene likely shortly after human arrival on the Balearics. They were one of only three native land mammals to the islands at the time of human arrival, alongside the shrew Nesiotites and goat-antelope Myotragus.

<i>Leithia</i> Extinct genus of giant dormice

Leithia is an extinct genus of giant dormice from the Pleistocene of the Mediterranean islands of Malta and Sicily. It is considered an example of island gigantism. Leithia melitensis is the largest known species of dormouse, living or extinct, being twice the size of any other known species.

Walter Verheyen's African dormouse is a monotypic species of rodent in the family Gliridae. From the Central Congolian lowland forests ecoregion in the central Congo Basin, it has been found in west-central Democratic Republic of the Congo, in the vicinity of the Lukenie River and of Wafania, near the left bank of the Luilaka River. Although not found in immediate association, Lorraine's dormouse and the short-eared African dormouse are understood to be "broadly sympatric". Most closely resembling Jentink's dormouse, it differs from this species both in its much smaller size and in its relative proportions. On the IUCN Red List, its conservation status has been assessed as Data Deficient.

References

  1. Davis Brewster, ed. Edinburgh Encyclopædia , 1819.
  2. "Species – Dormouse". The Mammal Society. Archived from the original on March 8, 2018. Retrieved March 8, 2018.
  3. 1 2 3 Lu, Xiaoyu; Costeur, Loïc; Hugueney, Marguerite; Maridet, Olivier (2021-02-01). "New data on early Oligocene dormice (Rodentia, Gliridae) from southern Europe: phylogeny and diversification of the family". Journal of Systematic Palaeontology. 19 (3): 169–189. doi:10.1080/14772019.2021.1888814. ISSN   1477-2019.
  4. Random House Dictionary, dormouse.
  5. Wedgwood, Hensleigh (1855). "On false etymologies". Transactions of the Philological Society (6): 66.
  6. Juškaitis, R. (2001). "Weight changes of the common dormouse (Muscardinus avellanarius L.) during the year in Lithuania" (PDF). Trakya University Journal of Scientific Research.
  7. 1 2 3 4 Baudoin, Claude (1984). Macdonald, D. (ed.). The Encyclopedia of Mammals . New York: Facts on File. pp.  678–680. ISBN   978-0-87196-871-5.
  8. Freedman, Paul (March 6, 2008). "Meals that Time Forgot". Gourmet.com. Archived from the original on March 11, 2008. Retrieved February 13, 2017.
  9. Kolumbić, Igor. "Fifth Puhijada". otok-hvar.com. Hvar: Offero Prima d.o.o. Archived from the original on March 7, 2021. Retrieved February 13, 2017.
  10. "10 ways to get a really good sleep". BBC. 27 March 2009. Retrieved February 13, 2017.
  11. "www.oocities.org/efexotics/africandormouse.html". 2009. As far as I know, my own pet shop in Cambridgeshire was the first pet shop in Britain to regularly stock the species (this was as recently as the 1990s).
  12. "Crittery Exotics". crittery.co.uk.
  13. "Crittery Exotics". crittery.co.uk.
  14. 1 2 Li, Zhaoyu; Mörs, Thomas (June 2023). "Dormice (Rodentia, Gliridae) from the Middle Miocene of Hambach 6C, Northwest Germany". Geobios. 78: 15–31. doi:10.1016/j.geobios.2023.05.002.
  15. Hennekam, Jesse J.; Benson, Roger B. J.; Herridge, Victoria L.; Jeffery, Nathan; Torres-Roig, Enric; Alcover, Josep Antoni; Cox, Philip G. (2020-11-11). "Morphological divergence in giant fossil dormice". Proceedings of the Royal Society B: Biological Sciences. 287 (1938): 20202085. doi:10.1098/rspb.2020.2085. ISSN   0962-8452. PMC   7735280 . PMID   33143584.
  16. Petrova, Tatyana V.; Panitsina, Valentina A.; Bodrov, Semyon Yu.; Abramson, Natalia I. (2024-09-27). "The mitochondrial genome of the critically endangered enigmatic Kazakhstani endemic Selevinia betpakdalaensis (Rodentia: Gliridae) and its phylogenetic relationships with other dormouse species". Scientific Reports. 14 (1). doi:10.1038/s41598-024-73703-2. ISSN   2045-2322. PMC   11436627 . PMID   39333293.
  17. Holden, Mary Ellen; Levine, Rebecca S (2009). "Chapter 9. Systematic Revision of Sub-Saharan African Dormice (Rodentia: Gliridae: Graphiurus) Part II: Description of a New Species of Graphiurus from the Central Congo Basin, Including Morphological and Ecological Niche Comparisons with G. crassicaudatus and G. lorraineus". Bulletin of the American Museum of Natural History. 331: 314–355. doi:10.1206/582-9.1. S2CID   85409018.

Further reading