Stenomorphus sinaloae
Darlington, 1936
Stenomorphus sinaloae is a ground beetle in the Carabidae, described by Darlington in 1936. It belongs to the S. sinaloae group, which also includes S. penicillatus. The species exhibits allometric trends in prothorax shape and hind tibia proportions, with evolutionary trends associated with burrowing and .
Pronunciation
How to pronounce Stenomorphus sinaloae: //ˌstɛnoʊˈmɔrfəs sɪnəˈloʊi//
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Habitat
Tropical dry forests and savannas. The is part of a specialized for life in drier tropical forests and open savanna .
Distribution
Mexico and the United States. The occurs in Middle America (Mesoamerica), with its geographic history tied to isolation and differentiation in response to cyclical climatic changes and mountain formation in the region during the Late Cretaceous through Quaternary periods.
Behavior
(burrowing) habits have been inferred from structural adaptations and allometric trends in the . is present, with allometric differences in prothorax form and hind tibia proportions between sexes.
Similar Taxa
- Stenomorphus penicillatusForms the S. sinaloae group with S. sinaloae; closely related phylogenetically based on structural features of male genitalia and ovipositor .
- Stenomorphus convexiorSister group to the S. sinaloae group (S. penicillatus + S. sinaloae) in the phylogenetic reconstruction of the .
More Details
Phylogenetic placement
S. sinaloae is part of a monophyletic Stenomorphus -group that includes Anisocnemus and Trichopselaphus. Within Stenomorphus, the S. sinaloae group is one of three recognized , alongside the S. convexior group and the S. angustatus group.
Evolutionary significance
The Stenomorphus, including S. sinaloae, provides evidence for evolutionary trends in allometry related to prothorax form and hind tibia proportions, driven by and specialization for burrowing. The geographic history of the genus reflects isolation in Middle America from South American ancestral stock, followed by specialization for drier tropical and differentiation in response to geological and climatic events.