| Urostylididae | |
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| Urochela quadrinotata | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Hemiptera |
| Suborder: | Heteroptera |
| Superfamily: | Pentatomoidea |
| Family: | Urostylididae Dallas, 1851 |
| Genera | |
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Urostylididae is a family of true bugs and is considered a basal or "primitive" family within the stink-bug lineage. They are found only in Asia. Older works used the spelling Urostylidae but this clashes with the name used for a protozoan family and a spelling correction (emendation) has been suggested that also avoids the confusion created by homonyms. The family name Urolabididae has also been used for some members in the past.
This family has about 100 species, with distribution limited mainly to eastern Asia. Urostylidids are 4 to 15 mm and somewhat longer than broad with elongated legs, three tarsal segments, and a small head. The antenna has 5 segments of which the first is longer than the head. The base of the antenna has broad tubercles and has a ringed appearance. The simple eyes or ocelli, when present (Urolabida lacks ocelli), are very close to each other. They show a wide separation between the hind and mid coxae on the underside. Other important family characters are the presence of a structure for stridulation, the stridulitrum on the first anal vein of the hind wing, and bristles on the claws. The female genital structure has nine gonocoxites that form a M or W-shaped sclerite. They suck plant sap. The male reproductive anatomy suggests close affinities to the Tessaratomidae subfamily Natalicolinae. The spermatheca has two pump flanges in two genera which is a feature found also in the Aradidae and Leptopodidae. Thus the phylogeny of the group is unclear but lies within the Pentatomoidea. In the past the family was divided into two subfamilies, but one group, the Saileriolinae, has since been suggested as a distinct family, Saileriolidae, by at least two studies. The position of Saileriolidae within the Pentatomoidea is still unclear.
References
- Berger, H.; Heiss, E.; Kerzhner, I.M. (2001). "Removal of homonymy between Urostylidae Dallas, 1851 (Insecta, Heteroptera) and Urostylidae Buetschli, 1889 (Ciliophora, Hypotrichia)" (PDF). Annalen des Naturhistorischen Museums in Wien. 103B: 301–302.
- Distant, WL (1902). Fauna of British India. Rhynchota. Volume 1. London: Taylor and Francis. p. 303.
- ^ Grazia, Jocelia; Schuh, Randall T.; Wheeler, Ward C. (2008). "Phylogenetic relationships of family groups in Pentatomoidea based on morphology and DNA sequences (Insecta: Heteroptera)" (PDF). Cladistics. 24 (6): 932–976. doi:10.1111/j.1096-0031.2008.00224.x. PMID 34892882. S2CID 41951432.
- Schuh, Randall T.; Slater, James Alexander (1995). True Bugs of the World (Hemiptera:Heteroptera): Classification and Natural History. Cornell University Press. pp. 245–246.
- Ren, Shu-Zhi; Lin, Cheng-Shing (2003). "Revision of the Urostylidae of Taiwan, with descriptions of three new species and one new record (Hemiptera-Heteroptera: Urostylidae)" (PDF). Formosan Entomologist. 23: 129–143.
- Kumar, R. (1971). "Morphology and relationships of the Pentatomoidea (Heteroptera) 5-Urostylidae". American Midland Naturalist. 85 (1): 63–73. doi:10.2307/2423912. JSTOR 2423912.
- Yao, Yunzhi; Cai, Wanzhi; Rider, David A.; Ren, Dong (2012). "Primipentatomidae fam. nov. (Hemiptera: Heteroptera: Pentatomomorpha), an extinct insect family from the Cretaceous of north-eastern China". Journal of Systematic Palaeontology. 11: 1–20. doi:10.1080/14772019.2011.639814. S2CID 86753502.
| Taxon identifiers | |
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| Urostylididae | |
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