Erebia is a
Holarcticgenus of
brush-footed butterflies,
family Nymphalidae. Most of the about 90–100
species (see also
below) are dark brown or black in color, with reddish-brown to orange or more rarely yellowish wing blotches or bands. These usually bear black spots within, which sometimes have white center spots.
This genus has found it easy to adapt to
arid and especially cold conditions. Most of its members are associated with high-altitude lands, forest clearings or high
latitude and
tundra. Erebia species are frequent in the
Alps,
Rocky Mountains,
subarctic and even
Arctic regions, and the cooler parts of
Central Asia. In fact, the North American term for these butterflies is alpines.
Palearctic species are collectively known as ringlets or arguses. However, none of these terms is used exclusively for this genus.
Taxonomy and systematics
The genus Erebia was erected by
Johan Wilhelm Dalman in 1816. As
type species, the
Arran brown—described as Papilio ligea by
Carl Linnaeus in 1758—was chosen. This is a very complex genus with over 1300
taxa, but a massive proportion of these are
junior synonyms. Some of the
available names are listed by Vladimir Lukhtanov.[1] A fully comprehensive
taxonomic checklist (i.e., without discussing synonymy and relationships) was published in 2008.[2]
Only three years after the genus' inception, the known species were reviewed by
Jacob Hübner.[3] He established no less than five new genera for a fraction of what would eventually be named as "species" of Erebia. But things hardly improved as more and more of the diversity of these butterflies came to note. In
Europe, a large number of Erebia taxa was described from the
Alps. In the 19th and early 20th century the Alps were a popular destination for butterfly collectors and specimens of Alpine butterflies were very profitable for dealers. The dealers, mostly German, not only sold specimens, but were
entomologists, entomological book dealers, entomological authors and publishers. Examples are
Fritz Rühl,
Alexander Heyne,
Otto Staudinger,
Andreas and
Otto Bang-Haas and, in
Paris,
Achille and
Émile Deyrolle.
Eventually, it became common to arrange supposed species and subspecies to "species groups" (not
superspecies, but an informal
phenetic arrangement) as pioneered by
B.C.S. Warren,[4] and attempt to resolve their true nature by and by. As
molecular phylogenetic studies add to the available data, it is becoming clear that most "varieties" that have at least been commonly considered subspecies in the latter 20th century are indeed lineages distinct enough to warrant some formal degree of recognition. Another result of recent research is confirmation of the theory that this genus contains many glacial
relict taxa, e.g., in the
brassy ringlet group (E. tyndarus and similar species).[5]
The number of currently recognized Erebia species is given variously around 90-100, as developments happen so fast that it is hard for authors to remain up to date regarding the newest changes.[5]
Species list
As of early 2008, the following good species and some rather distinct subspecies are listed:[6]
First of the three Erebia plates in the 1915 Macrolepidoptera of the World, edited by
Adalbert Seitz. This work was published near the height of
taxonomic confusion about these butterflies.
Another Macrolepidoptera of the World plate, showing larger species.
Third Macrolepidoptera of the World plate, of the 31 named
taxa depicted, probably less than 10 are actual species.
^Brower (2006), Albre et al. (2008), and see Savela (2008) for more sources
^Brock, Jim P. and K. Kaufman (2003). Kaufman Field Guide to Butterflies of North America. New York, NY:Houghton Mifflin.
References
Albre, Jerome; Gers, Charles & Legal, Luc (2008). Molecular phylogeny of the Erebia tyndarus (Lepidoptera, Rhopalocera, Nymphalidae, Satyrinae) species group combining CoxII and ND5 mitochondrial genes: A case study of a recent radiation. Mol. Phylogenet. Evol.47(1): 196–210.
doi:
10.1016/j.ympev.2008.01.009 (HTML abstract)