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| Rybaxis laminata (Motschulsky, 1836) - Staphylinidae Pselaphinae http://www.entomologiitaliani.net/public/forum/phpbb3/viewtopic.php?f=345&t=93797 |
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| Autore: | Chalybion [ 30/12/2020, 20:58 ] | ||||
| Oggetto del messaggio: | Rybaxis laminata (Motschulsky, 1836) - Staphylinidae Pselaphinae | ||||
Di questo maschio penso che la femmina sia questa viewtopic.php?f=345&t=93435&hilit=Pselaphinae , preso nello stesso luogo e contesto (alla luce); uniformemente fulvo, con solchi tra le fossette pronotali e processo ventrale ad ancora. Mi pongo gli stessi quesiti espressi nel link: se è una Ribaxis è una forma unicolore di longicornis? Grazie e buona fine d'anno!!  Che peggio del 2020  non può andare!
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| Autore: | Centrotoma [ 30/12/2020, 21:37 ] |
| Oggetto del messaggio: | Re: Pselaphinae da ID |
Rybaxis laminata, male |
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| Autore: | marco villa [ 31/12/2020, 10:14 ] |
| Oggetto del messaggio: | Re: Pselaphinae da ID |
Centrotoma ha scritto: Rybaxis laminata, male In the Catalogue of Palearctic Coleoptera, volume 2, Rybaxis laminata is considered a synonym of longicornis. Is it currently considered a valid taxon? |
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| Autore: | Chalybion [ 31/12/2020, 20:36 ] |
| Oggetto del messaggio: | Re: Pselaphinae da ID |
Thank a lot Adam. According with what Adam says here viewtopic.php?f=345&t=30906 laminata male bears a ventral process like in photo above, I suppose absent in longicornis male (not obviously but conceivable confirmed by Adam in the linked topic) not a negligible detail if so. That shows why I haven't found pictures of that process in the several pictures of longicornis males in web pages. Here https://www.naturbasen.dk/art/10476/rybaxis-laminata a picture of laminata male wich shows a lateral view of the process and male aedagal structure.
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| Autore: | Honza [ 31/12/2020, 22:40 ] | |||
| Oggetto del messaggio: | Re: Pselaphinae da ID | |||
According to Besuchet (1989) R. laminata is a synonym of R. longicornis. However, a more recent publication (Hansen et al., 1999) considers them to be two separate species; this is based on male genitalia. In the present study all the specimens were determined using Besuchet (1974, 1989), and therefore treated as R. longicornis. HANSEN M., PEDERSEN J. & PRITZL G. 1999: Records of beetles from Denmark, 1998 (Coleoptera). Entomol. Medd. 67:71–102 [in Danish, English abstract].
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| Autore: | Centrotoma [ 01/01/2021, 16:53 ] |
| Oggetto del messaggio: | Re: Pselaphinae da ID |
In my opinion, there are two separate and easily distinguishable species. I really do not understand why the completely different penises combined with excessive external characteristics are not taken into account, but.... as I said, it only is my conviction. |
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| Autore: | Chalybion [ 01/01/2021, 19:09 ] |
| Oggetto del messaggio: | Re: Pselaphinae da ID |
Thanks' Jan for pictures. Please someone of you can confirm only laminata bears the ventral process in males and by this, the identity of it is possible without dissection or must I to dissect? Happy new year to all!
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| Autore: | Centrotoma [ 02/01/2021, 22:26 ] |
| Oggetto del messaggio: | Re: Rybaxis laminata (Motschulsky, 1836) - Staphylinidae Pselaphinae |
The ventral lamina is only in R. laminata males. Dissection is not necessary.
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| Autore: | Chalybion [ 03/01/2021, 12:04 ] |
| Oggetto del messaggio: | Re: Rybaxis laminata (Motschulsky, 1836) - Staphylinidae Pselaphinae |
Very well. Thank a lot.
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