Araneagryllus

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Araneagryllus
Temporal range: Burdigalian
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Araneagryllus dylani holotype OSF 01.jpg
A. dylani holotype female
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Orthoptera
Suborder: Ensifera
Family: Phalangopsidae
Genus: Araneagryllus
Heads, 2010
Species:
A. dylani
Binomial name
Araneagryllus dylani
Heads, 2010

Araneagryllus is an extinct monotypic genus of cricket in the subfamily Phalangopsinae with the sole species Araneagryllus dylani. [1] The fossil was recovered in the Dominican Republic from early Miocene Burdigalian stage Dominican amber deposits on the island of Hispaniola. [1] [2] Araneagryllus is the first Phalangopsinae cricket to be described from the fossil record. [1]

The genus is known from a single 12.11 millimetres (0.477 in) long female specimen, the holotype, currently deposited in the collections of the American Museum of Natural History in New York City, as number "DR-12-32", and which was first studied by Dr. Sam W. Heads. [1] Dr. Heads published his 2010 type description in the Zoological Journal of the Linnean Society volume number 158. [1] The genus name is a combination of the Latin aranea meaning "spider" and gryllus, meaning "cricket" in reference to the common name given the subfamily where Araneagryllus is placed. [1] The species name is in honor of Dylan L. Heads, son of Dr. Heads. [1] The female has a notable development of a white "emulsion" developed around the mouth parts and on the abdomen. [1]

Araneagryllus dylani possesses a wide shield-like, pronotum which has irregularly spaced setae and prominent ridges along the center and margins. [1] The legs are long with areas of short and long setae, and are marked with a pattern of dark marking ranging from spots on the profemur to stripes on the mesotibia. [1] The metatibia sports two rows of ten to twelve spines, four subapical spurs, and three apical spurs. The middle apical spur is notably longer than the other two spurs. [1] Both cerci the joint of one hind leg and the ovipositor are incomplete, having been removed during shaping and polishing of the amber specimen. [1] Cladistic analysis places Araneagryllus within a clade composed of Arachnopsita , Leptopedetes , Longuripes , Mayagryllus , Nemoricantor , and Prolonguripes . All seven genera, among other characters, possessing an elongated middle apical spur. [1]

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References

  1. 1 2 3 4 5 6 7 8 9 10 11 12 13 Heads, S.W. (2010). "The first fossil spider cricket (Orthoptera: Gryllidae:Phalangopsinae): 20 million years of troglobiomorphosis or exaptation in the dark?". Zoological Journal of the Linnean Society. 158 (1): 56–65. doi: 10.1111/j.1096-3642.2009.00587.x .
  2. Iturralde-Vinent, M.A.; MacPhee, R.D.E. (1996). "Age and Paleogeographical Origin of Dominican Amber". Science. 273 (5283): 1850–1852. Bibcode:1996Sci...273.1850I. doi:10.1126/science.273.5283.1850. S2CID   129754021.