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Species Ramosiana insignis

predatory stink bug? - Ramosiana insignis
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hemiptera (True Bugs, Cicadas, Hoppers, Aphids and Allies)
Suborder Heteroptera (True Bugs)
Infraorder Pentatomomorpha
Superfamily Pentatomoidea
Family Pentatomidae (Stink Bugs)
Subfamily Pentatominae
Tribe Pentatomini
Genus Ramosiana
Species insignis (Ramosiana insignis)
Synonyms and other taxonomic changes
Ramosiana insignis (Blanchard)
Orig. Comb: Edessa insignis Blanchard 1841
Size
21-25 mm (1)
Range
s TX (one BG record), Mexico (Tamps to Chiapas) (1), also reported from Costa Rica (Nielsen et al. 2004)
Food
feeds on flower buds, fruits, and vegetative structures of gulf graytwig (Schoepfia schreberi, Olacaceae) (1)
host ranges from n. Mex to Venezuela, Caribbean, and Peninsular Florida(2)(3)
Life Cycle
large egg masses are usually arranged in a rhomboid shape
maternal care is restrained to the egg mass and first instar nymphs, and their behavior seems to be directed to deter parasitoids and predators.(1)
Nymphs hatched mainly in October and the middle of November.
Nymphs always left the egg mass collectively. As with most pentatomids, first instar nymphs do not feed. Soon after they moulted to the second instar they began to disperse, usually during November and December.
They reached the adult stage by the end of February or beginning of March.
After the fruiting season of S. schreberi at the end of March, adults aggregated in specific trees and stayed almost without movement until the end of June, when the rainy season started. (1)

predators include Euthyrhynchus floridanus (L.) (Hemiptera: Pentatomidae: Asopinae) found feeding on first and second-instar nymphs when the mother was absent. (1)
- Range: se US to Brazil
Remarks
Given that Schoepfia schreberi apparently doesn't occur in s. TX, are there any potential alternate hosts?
In the continental US, the genus Schoepfia is only found in Florida (2)
Apparently, the only other member of the Olax Family (Olacaceae) present in the US is Tallow wood - Ximenia americana which is endemic to Peninsular Florida.(4)(5)
Some (but not USDA(4)) consider Schoepfia to be a member of the newly erected family, Schoepfiaceae. Following that taxonomic split, the only genus of the family in the US is Schoepfia (in Florida).
Having said all that, note that the closely related pentatomid, Vulsirea violacea, also hosts on Schoepfia schreberi, and has also been recorded in Texas(1) (as a stray?).
See Also
Vulsirea violacea (F.) - Range: Texas (as a stray?) to Costa Rica(1)
The fact that both species have very similar nymphs, that both have an aposematic coloration, and that both species exhibit maternal behavior could be evidence that indeed these two genera are related. (1)
Print References
López M., & Cervantes L. 2010. Life histories of Ramosiana insignis (Blanchard) and Vulsirea violacea (F.) (Hemiptera: Heteroptera: Pentatomidae), with descriptions of immature stages. Proceedings of the Entomological Society of Washington 112(1): 81-96. (1)
Nielsen, V., P. Hurtada, D. H. Janzen, G. Tamayo, and A. Sittenfeld. 2004. Recolecta de artropodos para prospeccion de la biodiversidad en el area de conservacion Guanacaste, Costa Rica. Revista de Biologia Tropical 52(1): 119–132.
Internet References