Tylosis jimenezii
Dugès, 1879
Tylosis jimenezii is a of longhorn in the , first described by Dugès in 1879. It belongs to the tribe Trachyderini, a group of often large and strikingly colored cerambycids. The species is currently considered a synonym of Tylosis jimenezi, with records from both the United States and Mexico. Limited field observations suggest it may be associated with Malvaceae plants in arid regions of the southwestern United States.
Pronunciation
How to pronounce Tylosis jimenezii: /tɪˈloʊsɪs dʒɪˈmɛnɛzi/
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Identification
Identification to level within Tylosis requires examination of detailed morphological characters including antennal proportions, pronotal and elytral , and male . T. jimenezii can be distinguished from the similar T. maculatus by subtle differences in color pattern and body proportions, though precise diagnostic characters require taxonomic literature. The species has been treated as a synonym of T. jimenezi in recent , complicating identification.
Habitat
Observations indicate association with arid and semi-arid environments in the southwestern United States. A documented field record from Texas describes individuals found perched on foliage of Sphaeralcea angustifolia (narrow-leaved globemallow, Malvaceae), suggesting potential association with this plant family in desert scrub and grassland .
Distribution
Recorded from North America (United States) and Middle America (Mexico). Specific localities include western Texas and adjacent regions. Distribution records are sparse, reflecting limited effort rather than actual rarity.
Seasonality
A field observation from late July (July 19–31, 2021) documents active , suggesting summer and activity period. This timing is consistent with other Trachyderini that typically emerge during the warm season to feed and reproduce.
Host Associations
- Sphaeralcea angustifolia - perched on foliageNarrow-leaved globemallow (Malvaceae); observed with male/female pair on foliage in Van Horn, Texas area
Behavior
have been observed perched on foliage during daylight hours. The of remaining stationary on vegetation is consistent with mate location and feeding activities typical of .
Similar Taxa
- Tylosis maculatusSimilar large size, bold red and black coloration, and shared tribe Trachyderini; distinguished by subtle differences in elytral maculation pattern and body proportions
- Crossidius speciesShared tribe Trachyderini with similar color patterns and associations on Asteraceae; distinguished by generally smaller size and different antennal structure
More Details
Taxonomic Status
Tylosis jimenezii Dugès, 1879 is currently treated as a synonym of Tylosis jimenezi in major databases including Catalogue of Life and GBIF. The original spelling 'jimenezii' versus 'jimenezi' reflects historical variations in Latinization of patronymic epithets. The was originally described by Dugès in 1879, with Monné & Giesbert (1994) contributing to subsequent taxonomic treatment.
Field Documentation
The only detailed field observation available documents a male/female pair collected in Van Horn, Texas area in late July 2021, found perched on Sphaeralcea angustifolia (narrow-leaved globemallow). This represents a significant range extension or documentation gap, as previous records were primarily from Mexico. The noted this as a first encounter with the , highlighting its relative obscurity in United States faunal surveys.