Tetranodus
Linell, 1896
Species Guides
1Tetranodus is a of longhorn beetles (Cerambycidae) in the tribe Tillomorphini. The genus was established by Linell in 1896 and contains seven described distributed in the Americas. Species have been described from the late 19th century through the late 20th century, with several described by Chemsak and colleagues. The genus is placed in the Cerambycinae, a diverse group of primarily wood-boring beetles.
Pronunciation
How to pronounce Tetranodus: //tɛtrəˈnoʊdəs//
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Identification
Members of Tetranodus can be distinguished from related in Tillomorphini by the combination of four-segmented antennal clubs (the source of the genus name, from Greek 'tetra' meaning four and 'nodus' meaning knot or node) and specific pronotal and elytral sculpturing patterns. -level identification relies on details of pronotal shape, elytral surface texture, and coloration of the pronotum and .
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Distribution
The occurs in the Americas. Specific distribution records include Mexico and Central America for several , with T. reticeps originally described from Panama and T. niveicollis from Guatemala.
Similar Taxa
- Other Tillomorphini generaSimilar body form and antennal structure; distinguished by the four-segmented antennal club characteristic of Tetranodus and specific combinations of pronotal and elytral features.
More Details
Etymology
The name Tetranodus refers to the four-segmented antennal club (Greek: tetra = four, nodus = knot/node), a diagnostic feature of the genus.
Taxonomic history
Authorship dates vary in sources: Linell, 1896 per Catalogue of Life versus Linell, 1897 per GBIF. The has been revised by Chemsak, who described five of the seven known between 1969 and 1988.