Skipper (butterfly)

Skipper Butterfly
Green Grass-Dart Skipper Butterfly, Ocybadistes walkeri
Scientific classification
Kingdom: Animalia Phylum: Arthropoda Class: Insecta Order: Lepidoptera (unranked) Rhopalocera Superfamily: Hesperioidea Family: Hesperiidae Latreille, 1809
Diversity
About 550 genera, 3,500 species
Subfamilies
Coeliadinae Hesperiinae Heteropterinae Megathyminae (disputed) Pyrginae Pyrrhopyginae Trapezitinae

In zoology, skipper or skipper butterfly is the common name for any of the butterflies comprising the family Hesperiidae, characterized by antennae clubs hooked backward, stocky bodies, and typically quick, darting flight habits, which is the source of their name. They also differ from the true butterflies of the family Papilionoidea by generally having stronger wing muscles and better eyes. There are about 4,000 recognized species of skippers and they occur worldwide, but with the greatest diversity occurring in the tropical regions of Central and South America.

Overview and description

Skippers are considered a type of butterfly. The Order Lepidoptera commonly is separated into two groups, the butterflies and the moths. A lepidopteran generally is considered a butterfly if it belongs either to the superfamily Papilionoidea ("the true butterflies") or the superfamily Hesperioidea (“the skippers”), the latter of which has only one family, Hesperiidae. Some authors also would include as butterflies the members of the superfamily Hedyloidea ("the American butterfly moths"). Although the skippers are usually counted as butterflies, they are somewhat intermediate between the rest of the true butterflies and the remaining Lepidoptera, the moths.

Skippers differ in several important ways from the true butterflies. However, Hesperioidea and Papilionoidea are considered sister taxa, so the butterflies collectively are thought to constitute a natural group or true clade. Indeed, some modern taxonomists place them all in superfamily Papilionoidea, distinguishing the skippers from the other butterflies at the series level only. In this system, Papilionoidea consists of the series Hesperiiformes (with one family only, the skipper family Hesperiidae) and the series Papilioniformes (with five families). When skippers are classified in the superfamily Hesperioidea, it also includes the one family, the Hesperiidae. Hesperioidea, Papilionoidea, and Hedyloidea also are viewed by some taxonomists as constituting a clade.

Skippers differ in several important ways from the true butterflies of the superfamily Papilionoidea and members of the neotropical superfamily Hedyloidea. Collectively, these three groups of butterflies share several characteristics especially in the egg, larval, and pupal stage (Ackery et al. 1999). However, skippers have the antennae clubs hooked backward like a crochet hook, while butterflies have club-like tips to their antennae, and hedylids have feathered or pectinate antennae giving them an even more moth-like appearance than skippers. Skippers also have generally stockier bodies than the other two groups, with stronger wing muscles, and have more well-developed eyes.

Hesperiid geographical distributions, larval foodplants, immature stages, and phylogenetic relationships remains poorly understood (Warren et al. 2008).

Classification

There are about 4,000 known species of skippers (Bridges 1993) distributed among 567 genera (Warren et al. 2008). Many species of skippers look frustratingly alike. For example, some species in the genera Erynnis, Hesperia, and Amblyscirtes cannot currently be distinguished in the field by experts, the only reliable method of telling them apart involving dissection and examination of the genitalia.

Taxonomy of the subfamilies remains unsettled. For example, some authors recognize the "giant skippers" as the subfamily Megathyminae, while others recognize them as a family, or a group of genera within the subfamily Hesperiinae (Warren et al. 2008).

Skippers usually are classified into the following seven subfamilies (Brower and Wilson 2008):

• Subfamily Coeliadinae (Awls, awlets, and policemen), about 75 species
• Subfamily Hesperiinae (Grass skippers), over 2000 species
• Subfamily Heteropterinae (skipperlings), about 150 species
• Subfamily Megathyminae (Giant skippers), about 100 species
• Subfamily Pyrginae (Spread-winged skippers), about 1000 species)
• Subfamily Pyrrhopyginae (Firetips), about 150 species)
• Subfamily Trapezitinae (Australian skippers), about 60 species)

Some authors have recognized an eighth subfamily, Euschemoninae, which includes only the large, brightly-colored Australian skipper, Euschemon rafflesia, which is unique among hesperiids, and indeed butterflies, in having a frenulum and retinaculum in the male, which joins the fore- and hindwing together (Warren et al. 2008). Some authors treat Heteropterinae or Megathyminae as subordinate taxonomic groups within the subfamily Hesperiinae (Warren and Bridges et al. 2008). Brower and Warren (2008) recognized the seven subfamilies of Coeliadinae, Hesperiinae, Eudaminae, Euschemoninae, Heteropterinae, Pyriginae, and Trapezitinae.

Coeliadinae "Pyrginae" (including Pyrrhopyginae) Heteropterinae Trapezitinae Hesperiinae (including Megathyminae) A phylogeny of some subfamlies families based on DNA sequence data.

Warren et al. (2008), using DNA sequence data from three gene regions, found strong support for the monophyly of the family Hesperiidae. They also found support for the monophyly of several of the traditionally recognized subfamilies. The monophyly of Coeliadinae, Pyrrhopyginae, Heteropterinae, Trapezitinae, and Megathyminae is strongly supported by their research, while the monophyly of Hesperiinae is moderately supported. Pyrginae if found to be paraphyletic. However, Warren et al. placed Pyrrhopyginae and Euschemon deep within the Pyrginae and placed the giant skippers (Megathyminae) deep within Hesperiinae.

Thus, Warren et al. (2008) felt that four subfamilies of Hesperiidae should be recognized, with the paraphyletic "Pyrginae" currently a fifth group:

• Subfamily Coeliadinae
• Subfamily Heteropterinae
• Subfamily Trapezitinae
• Subfamily Hesperiinae.
• "Pyrginae"

"Pyrginae," being of paraphyletic grade composed of several clades, requires additional word to make a satisfactory classification.

References

ISBN links support NWE through referral fees

• Ackery, P.R., de Jong, R and Vane-Wright, R.I. (1999). The Butterflies: Hedyloidea, Hesperioidea and Papilionoidae. Pp. 263-300 in Kristensen, N.P. (Ed.). Lepidoptera, Moths and Butterflies. Volume 1: Evolution, Systematics, and Biogeography. Handbuch der Zoologie. Eine Naturgeschichte der Stämme des Tierreiches / Handbook of Zoology. A Natural History of the phyla of the Animal Kingdom. Band / Volume IV Arthropoda: Insecta Teilband / Part 35: 491 pp. Walter de Gruyter, Berlin, New York.

• Bridges, C. A. 1993. Catalogue of the family-group, genus-group, and species-group names of the Hesperiidae (Lepidoptera) of the world. Published by Author, Urbana. IL. Cited in Warren et al. (2008).

http://tolweb.org/Hesperiidae/12028 Brower, Andrew V. Z. and Andrew Warren. 2008. Hesperiidae Latreille 1809. Skippers. Version 07 April 2008 (under construction). http://tolweb.org/Hesperiidae/12028/2008.04.07 in The Tree of Life Web Project, http://tolweb.org/

http://encarta.msn.com/encyclopedia_761582498/Skipper_(butterfly).html MSN Encarta

External links

• Nearctica North America (Index page)
• Skippers of North America: Large format diagnostic photographs Cirrus Digital Imaging
• Tree of Life Hesperiidae
• bean leafroller on the UF / IFAS Featured Creatures Web site
• Megathymus yuccae, yucca giant-skipper on the UF / IFAS Featured Creatures Web site
• Epargyreus clarus, silver-spotted skipper on the UF / IFAS Featured Creatures Web site
• Internet Archive Free downlad of Watson, E.Y. 1891 Hesperiidae Indicae : being a reprint of descriptions of the Hesperiidae of India, Burma, and Ceylon

Credits

New World Encyclopedia writers and editors rewrote and completed the Wikipedia article in accordance with New World Encyclopedia standards. This article abides by terms of the Creative Commons CC-by-sa 3.0 License (CC-by-sa), which may be used and disseminated with proper attribution. Credit is due under the terms of this license that can reference both the New World Encyclopedia contributors and the selfless volunteer contributors of the Wikimedia Foundation. To cite this article click here for a list of acceptable citing formats.The history of earlier contributions by wikipedians is accessible to researchers here:

• Skipper_(butterfly)  ^history

The history of this article since it was imported to New World Encyclopedia:

• History of "Skipper (butterfly)"

Note: Some restrictions may apply to use of individual images which are separately licensed.