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Species Alcaeorrhynchus grandis - Giant Strong-nosed Stink Bug

Spined Soldier Bug (Podisus maculiventris) - Alcaeorrhynchus grandis Spined Soldier Bug (Podisus maculiventris) - Alcaeorrhynchus grandis Giant Stink Bug - Alcaeorrhynchus grandis Hemipteran nymph - Alcaeorrhynchus grandis Soldier bug? - Alcaeorrhynchus grandis nymph of giant strong-nosed stinkbug - Alcaeorrhynchus grandis Unknown stink bug - Alcaeorrhynchus grandis Assassin bug ? - Alcaeorrhynchus grandis
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 Asopinae (Predatory Stink Bugs)
Genus Alcaeorrhynchus
Species grandis (Giant Strong-nosed Stink Bug)
Explanation of Names
Alcaeorrhynchus grandis (Dallas 1851)
♂ 16-21 mm, ♀ 18-25 mm
Large, flat, speckled brown, with a short stabbing beak; can be distinguished from Podisus by larger size (>15 mm; Podisus adults reach only 14 mm) and by the double-pointed humeral spines.

First instar is hard to distinguish from that of Euthyrhynchus floridanus: both have a blue-black head and thorax and red abdomen with dark central and lateral rows of dark-colored plates, but egg masses differ: in E. floridanus, it's loosely oval and contain 20-90 eggs; in A. grandis, 100-200 eggs in multiple rows. Instars III-V are blue-black with red keels on the pronotum; instar V also has reddish bars.[Cite:185010]
se US (SC-FL to KS-TX) to Argentina; W. Indies(1)(2)(2)(BG data)
on soybean, eggplant, and shrubs near streams & marshes(3)
Life Cycle
overwinters in c. TX as adults and mature nymphs:
Internet References
Fact sheet (Richman & Mead 2014)(4)