Tetrastichus Haliday, 1844
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https://dx.doi.org/10.3897/BDJ.8.e59177 |
publication LSID |
lsid:zoobank.org:pub:AD70B3AB-6763-4D28-85F2-90988225C5C8 |
persistent identifier |
https://treatment.plazi.org/id/D9E0ACBA-9BED-52F0-B5B5-3947CE0E7F46 |
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scientific name |
Tetrastichus Haliday, 1844 |
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Tetrastichus Haliday 1844:297-298. Type species Cirrospilus attalus Walker, by monotypy (= T. miser (Nees)). Not Tetrastichus Walker 1842:116, a name suppressed by the International Commission on Zoological Nomenclature (1965).
Tetrastichus Graham (1991)
Diagnosis
European species of Tetrastichus can be diagnosed by a combination of three features: submarginal vein in fore wing with one dorsal seta, mid-lobe of mesoscutum with at least three adnotaular setae on each side and propodeum with a ± complete lateral longitudinal carina that splits into two in posterior part (like an inverted "Y", Fig. 2 c). In addition, most species have a strong exoskeleton, preventing specimens from collapsing when dried. This last feature is not unique to Tetrastichus , but in combination with the other three features, it helps when diagnosing this group.
Identification keys
Figs 2, 3:The identification keys are based on the two keys in Graham (1991), one for females and one for males, with the new species included and with some modifications of features included and order of couplets slightly changed. The main reason for keeping the sexes apart is that differences between species are frequently based on features unique to each sex (antennal characteristics and length of female gaster). Since males are unknown for several of the species, the male key is distinctly shorter than the female key.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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Tetrastichus Haliday, 1844
Hansson, Christer & Schmidt, Stefan 2020 |
Tetrastichus
Haliday 1844 |
Tetrastichus
Haliday 1844 |
Tetrastichus
Haliday 1844 |
Tetrastichus
Haliday 1844 |
Cirrospilus attalus
Walker 1839 |