Rhabdomys dilectus

Mesic four-striped grass rat
At the Prague Zoo
Conservation status
Least Concern  (IUCN 3.1)[1]
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Rodentia
Family:	Muridae
Genus:	Rhabdomys
Species:	R. dilectus
Binomial name
Rhabdomys dilectus De Winton, 1897
Synonyms
Rhabdomys algoae Roberts, 1946 Rhabdomys angolae (Wroughton, 1905) Rhabdomys bethuliensis Roberts, 1946 Rhabdomys chakae (Wroughton, 1905) Rhabdomys cradockensis Roberts, 1946 Rhabdomys diminutus (Thomas, 1893) Rhabdomys griquoides Roberts, 1946 Rhabdomys moshesh (Wroughton, 1905) Rhabdomys nyasae (Wroughton, 1905) Rhabdomys vaalensis Roberts, 1946 [2]

Rhabdomys dilectus, the mesic four-striped grass rat, is a species of rodent in the family Muridae.^[3]

Taxonomy

Traditionally the genus Rhabdomys has been seen as a single species, Rhabdomys pumilio, though modern evidence on the basis of karyotype and mtDNA analysis suggests that it comprises a second species, Rhabdomys dilectus .^[4]

R. dilectus is divided in the following subspecies.

• R.d.dilectus (karyotypic form 2n = 46): Lesotho, South African province of KwaZulu-Natal, and eastern Zimbabwe;
• R.d.angolae (Wroughton, 1905): central and southern Angola;
• R.d.diminutus (Thomas, 1893): central and western Kenya, central-eastern Uganda, highlands of central-northern Tanzania, south-east Democratic Republic of Congo, northern Malawi;

Description

Rhabdomys dilectus is a fairly typical smallish murid, rather larger than house mice. Head+body length is between 90 and 135 mm, the length of the tail between 80 and 135 mm, the length of the foot between 17 and 33 mm, the length of the ears between 10.0 and 20 mm and the weight up to 68 g.^[5]

The back is dark reddish-brown and displays characteristic black longitudinal stripes.^[6] The stripes inspired the generic name, which is derived from the Greek rhabdos meaning rod, giving Rhabdomys, meaning something like "barred mouse". The ventral sides are lighter. The legs are dark grizzled. The tail is shorter than the head and body. It is a terrestrial species, crepuscular and solitary. It feeds mainly on seeds of wheat and partly on plants, berries and small invertebrates. It is considered a plague by farmers.

Distribution

It is found throughout southern Africa.

Habitat

Rhabdomys dilectus lives in the wetter mountain savannas up to 2,300 meters above sea level. It often invades cultivated fields. In urban areas it may enter houses.

References