Palaeoperissomma Kovalev in Kalugina & Kovalev, 1985
publication ID |
https://doi.org/ 10.11646/zootaxa.4718.4.3 |
publication LSID |
lsid:zoobank.org:pub:32C51811-97BA-40E4-B503-F25F8C4CF98A |
DOI |
https://doi.org/10.5281/zenodo.5920778 |
persistent identifier |
https://treatment.plazi.org/id/03C75260-FF90-FFAE-FF26-A0A24A60FD49 |
treatment provided by |
Plazi |
scientific name |
Palaeoperissomma Kovalev in Kalugina & Kovalev, 1985 |
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Palaeoperissomma Kovalev in Kalugina & Kovalev, 1985 View in CoL
( Figures 7A, B View FIGURE 7 , 8 View FIGURE 8 A–D)
Palaeoperissomma: Kalugina & Kovalev 1985: 115 View in CoL .
Palaeoperissomma Kovalev in Kalugina & Kovalev, 1985 View in CoL : Lukashevich 2011: 32.
Type species. Palaeoperissomma collessi Kovalev in Kalugina & Kovalev, 1985 View in CoL (Kubekovo, Siberia, J 2).
Species included. Besides type species,? Palaeoperissomma demetrii Kovalev, 1990 View in CoL (Turga, Transbaikalia, K 1) and P. ornatum Lukashevich, 2011 View in CoL (Shar Teg, Mongolia, J 3).
Remarks. Two of three known species were described based on the single isolated wings each ( Kalugina & Kovalev 1985; Lukashevich 2011): P. collessi (holotype PIN, No.1255/261) and P. ornatum (holotype PIN, No.4270/2278). An additional specimen of type species (PIN, No.1255/1341) was collected from the same locality (Kubekovo) in 1989 and studied herein ( Fig. 8A, B View FIGURE 8 ). Some characters of living Perissomma are observed in body structures: V-shaped suture of the tipuloid type; thorax with large metanotum; legs slender, rather elongate, without tibial spurs. Probably three ocelli placed close together in a triangle on the dorsum of the head are present too. As in Perissomma , antenna moniliform, rather short and stout, with 11 segments, segments 2 and 3 enlarged (pedicel and first flagellomere), segment 11 very small, all segments with fine setae only. However, all segments are transverse (shorter than broad).
The holotype of? P. demetrii (PIN, No. 1742/667) was re-studied by us ( Figs 7A, B View FIGURE 7 ; 8C, D View FIGURE 8 ). Kovalev (1990) tentatively suggested that it was a male, but re-examination revealed elongated cerci, therefore the specimen is a female. Visible facets are of similar size. In the original description Kovalev noted that the pattern of antenna (11 segments, enlarged pedicel and tiny last flagellomere) and U-shaped suture on mesonotum ( Fig. 7 A,B View FIGURE 7 ) are similar to living Perissomma , however, the robust habitus differs from one of Perissomma and from habitus of Jurassic P. collessi as now became obvious. Due to poor state of wing preservation Kovalev was hesitant in the generic attribution of this species and these doubts remain (see Discussion).
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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Palaeoperissomma Kovalev in Kalugina & Kovalev, 1985
Lukashevich, Elena D. & Blagoderov, Vladimir A. 2020 |
Palaeoperissomma Kovalev in Kalugina & Kovalev, 1985
Lukashevich, E. D. 2011: 32 |
Palaeoperissomma:
Kalugina, N. S. & Kovalev, V. G. 1985: 115 |