Temnelytron, Lawrence, 2019

Lawrence, John F., 2019, Australian Nitidulinae: general review with descriptions of new genera and species (Coleoptera: Nitidulidae), Zootaxa 4657 (2), pp. 261-290 : 279

publication ID	https://doi.org/ 10.11646/zootaxa.4657.2.3
publication LSID	lsid:zoobank.org:pub:0B82344A-CD64-4DC0-B029-4453A1BADB9D
DOI	https://doi.org/10.5281/zenodo.3800359
persistent identifier	https://treatment.plazi.org/id/F4375F2C-B610-8378-27E2-D650FE62F96A
treatment provided by	Valdenar
scientific name	Temnelytron
status	gen. nov.

Treatment

Temnelytron , gen. nov.

Type species: Temnelytron nigrum , sp. nov.

Diagnosis. This monotypic genus differs from all other nitiduline genera in the distinct excision at the apex of each elytron. It resembles the genera Aethinodes , Gaulodes Erichson, 1843 , Lasiodactylus , Lasiodites , Ostomarcha Kirejtshuk, 2006b , Phenolia and Plesiothina in that 1) the elytra are clothed with dense longitudinal rows of inclined to decumbent megasetae, which are never bristle-like or brush-like, alternating with two or occasionally more rows of microsetae and their associated pits ( Figs 14–15, 18 View FIGURES 13–30 ) and 2) the anterior edge of the metaventrital lobe is not or only slightly or gradually declined to meet the posterior edge of the mesoventrite. Temnelytron nigrum shares the following characters with one or more of seven genera listed above: 1) vertexal line incomplete at middle ( Gaulodes ); 2) mandible unidentate with a subapical tooth ( Gaulodes , Lasiodactylus , Lasiodites , Plesiothina ); 4) prosternum short- er than procoxal cavities (all except Phenolia and Plesiothina ); 5) mesoventrite without median carina (most genera); 6) axillary spaces relatively small ( Gaulodes , Ostomarcha , Phenolia , Plesiothina ); 7) protibial ridge present in male (most genera); 8) mesotibia not modified in male ( Aethinodes , Ostomarcha , Phenolia , Plesiothina ); 9) basal protarsomeres and mesotarsomeres distinctly widened ( Gaulodes , Plesiothina ); 10) intercoxal process on ventrite 1 more or less truncate ( Aethinodes , Lasiodites ); 11) postcoxal lines on ventrite 1 broadly curved and not extending far from coxal rim ( Gaulodes , Lasiodactylus , Plesiothina ); 12) gonostyli highly reduced and lateral ( Gaulodes ); 13) genital capsule of male with subapical pit ( Gaulodes and Phenolia ). Temnelytron differs from some of the above genera as follows: 1) incomplete vertexal line (complete in most genera, absent in Phenolia ); 2) unidentate mandible (bidentate in Ostomarcha and Phenolia ); 3) anterior pronotal angles produced forward (not in Lasiodactylus ); 4) pronotal microsetae arising from within pits (adjacent to pits in other genera); 5) mesoventrite without median carina (with short carina in Aethinodes ); 6) elytral megasetae gradually narrowed, apically acute, not ribbed ( Fig. 15 View FIGURES 13–30 ) (similar but with several ribs in Gaulodes and Plesiothina , abruptly narrowed at about middle with fine ribs in Phenolia ); 7) protibial ridge present in male ( Fig. 30 View FIGURES 13–30 ) (absent in Phenolia ); 8) mesotibia not modified in male (modified in Gaulodes , Lasiodactylus , Lasiodites ); 9) basal protarsomeres and mesotarsomeres distinctly widened (basal protarsomeres only in Aethinodes , Lasiodites , Ostomarcha and Phenolia , all tarsomeres in Lasiodactylus ); 10) weak, broadly curved postcoxal lines on ventrite 1 (well-developed, angulate lines in Aethinodes , no lines in Lasiodites , Ostomarcha and Phenolia ); 11) short, broad, lateral gonostyli ( Fig. 32 View FIGURES 31–46 ) (elongate, parallel-sided, apical or subapical gonostyli in Aethinodes , Lasiodactylus , Lasiodites , Phenolia , and Plesiothina ; gonostyli absent in Gaulodes and Ostomarcha ); 12) gonocoxites without lateral recurved teeth ( Fig. 79 View FIGURES 79–92 ) (present in Gaulodes ); 13) genital capsule without subapical, transverse carina ( Fig. 57 View FIGURES 47–62 ) (present in Aethinodes , Lasiodactylus , Lasiodites , Ostomarcha and Plesiothina ).