Schwenckfeldina archoica
| Schwenckfeldina archoica Temporal range:
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|---|---|
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Diptera |
| Family: | Sciaridae |
| Genus: | Schwenckfeldina |
| Species: | †S. archoica
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| Binomial name | |
| †Schwenckfeldina archoica Mohrig & Solórzano Kraemer, 2007
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Schwenckfeldina archoica is an
Late Oligocene to Early Miocene[1] fossil found in Mexico. S. archoica is the only species in the genus Schwenckfeldina to have been described from fossils found in Mexican amber.[2]
History and classification
Schwenckfeldina archoica is known from a single fossil, an
Greek word "archaic" as a reference to the great number of features shared between modern species and the fossil.[2]
Description
The Schwenckfeldina archoica male is small, approximately 3.5 millimetres (0.14 in) long, and has a body
flagellomeres in each antenna, with all the flagellomeres wider than they are long, and all covered with a dense grouping of setae. The fore wings are pale and the halteres are short and brown. The species is distinguishable by the structure of the male genitalia, the gonocoxites and gonostyli. The inner sides of the gonocoxites are covered in numerous long bristles, while the gonostyli have an overall broad rounded shape and are brown in color. The outer sides of the gonostyli have long bristles that progress to coat the upper third of the inner side. Three large spines are present in the middle of the inner surface, with the uppermost spine shorter the other two.[2]
References
- ^ .
- ^ a b c d Solórzano Kraemer, M. M.; Mohrig, W. (2007). "Schwenckfeldina archoica sp. nov. (Diptera, Sciaridae) from the middle Miocene Mexican amber" (PDF). Alavesia. 1: 105–108.