23 de abril de 2021

Spilostethus

Spilostethus longulus :

Salalah, Oman, by Moayed Salim Bahajjaj

Desertical species, often found on the ground, under the host plants, such as Calotropis procera. In North Africa, Arabia and Near East. Elongated, head is red with black patterns. Apex of scutellum is red.

Spilostethus macilentus

Bulawayo, Zimbabwe, by nickypegg

Much similar to S. longulus, to the point it was, at first, confused with it by its author, Carl Stål. A Southern African species, differs from longulus by its overall, darker habit. Head mostly black, apically and basally around the eyes, with either a "Y"-shaped red pattern, or but a simple, faint, red patch. Scutellum red apically.

Ingresado el 23 de abril de 2021 por fabienpiednoir fabienpiednoir | 0 comentarios | Deja un comentario

17 de marzo de 2021

Lygaeinae de Guyane

Oncopeltus cingulifer / sandarachatus

Deux espèces difficiles à distinguer, qui ont fait l'objet de confusion par le passé. Oncopeltus sandarachatus n'ayant jamais été rapporté de la région, il s'agit probablement ici plutôt d'O.cingulifer, mais dans l'attente de trancher, je mentionne ici les deux noms.

Craspeduchus variegatus

Ingresado el 17 de marzo de 2021 por fabienpiednoir fabienpiednoir | 0 comentarios | Deja un comentario

04 de junio de 2020

Genus Erythrischius in North America

Oncopeltus sandarachatus / Oncopeltus cingulifer.


Orlando, by Andrew Lamb, August 28th 2017

Two very close species, hard to distinguish. The key features remains unclear, and subspecies or varieties have been described, that are not necessarly of some taxonomic importance. It is not impossible that, in the future, observations refered to both the two would have to be reviewed in the light of new discoveries.
O'Rourke's subspecies antillensis poses problems that should be examed.

Smaller, on average : 9-12 mm, about the size of a Lygaeus sp.. The size remains by far the simplest way to distinguish from O. fasciatus. Appears to be the most common Oncopeltus species in Florida, with Oncopeltus fasciatus more uncommon.

More slender, often with a contrasting bright red head. Pronotal pattern also slighly different, though pretty variable, in many case more enlarged on the posterior margin, often reaching the posterior angles. Last three abdominal segment bright red, visible ventrally only on adults, making ventral view often easier to identify than dorsal ones.

https://ibb.co/DYLMnMR




Ingresado el 04 de junio de 2020 por fabienpiednoir fabienpiednoir | 0 comentarios | Deja un comentario

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