Tytthonyx
LeConte, 1851
Tytthonyx is a of comprising approximately 19 described . It occupies a phylogenetically ambiguous position, currently classified as incertae sedis within Silinae in its own tribe Tytthonyxini, though phylogenetic analysis indicates it is sister to Malthininae. The genus exhibits a combination of morphological traits shared with both . Some species possess distinctly .
Pronunciation
How to pronounce Tytthonyx: /ˈtɪθ.ə.nɪks/
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Identification
Members of Tytthonyx can be distinguished by separated gular and the absence of gonostyli. Some (subgenus Tytthonyx) have distinctly . The shares with a retinaculum, radially symmetrical maxillary palpomeres, shape, reduced , and specific patterns with Malthininae, while ventrite/tergite structures and resemble Silinae.
Images
Similar Taxa
- NothotytthonyxExtinct fossil distinguished from Tytthonyx by merged gular and presence of gonostyli
- Malthininae (subfamily)Tytthonyx shares mandibular, palpal, pronotal, elytral, and characters, but differs in ventrite/tergite and structures
- Silinae (subfamily)Tytthonyx resembles Silinae in ventrite/tergite and structures, but differs in mandibular, palpal, pronotal, elytral, and characters
More Details
Taxonomic Position
Tytthonyx has been historically difficult to place within . It is currently classified as incertae sedis within Silinae in its own tribe Tytthonyxini, though phylogenetic analysis has revealed it as the sister group of Malthininae. This intermediate position explains its mosaic of morphological characters from both .
Fossil Record
Tytthonyx has been used as a comparative for interpreting fossil , including the amber Nothotytthonyx from mid-Cretaceous Burmese amber (~99 million years ago).