Tribasodites Jeannel, 1960
publication ID |
https://doi.org/ 10.11646/zootaxa.5111.1.1 |
publication LSID |
lsid:zoobank.org:pub:836B0F69-037C-4D0F-80DB-94FE454F48E3 |
DOI |
https://doi.org/10.5281/zenodo.6964400 |
persistent identifier |
https://treatment.plazi.org/id/C822F213-FF45-24F8-CB88-A22D70FB2288 |
treatment provided by |
Plazi |
scientific name |
Tribasodites Jeannel, 1960 |
status |
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Tribasodites Jeannel, 1960 View in CoL
Chinese common name: ûḃà甲¤
Tribasodites Jeannel, 1960: 411 View in CoL ; Newton & Chandler 1989 (catalog); Sugaya & Maruyama 2003 (biological notes); Yin et al. 2011d, 2015b (cave species); Nomura & Aung 2020 (first record from Myanmar). Type species: Tribasodites View in CoL antennalis Jeannel, 1960: 412 (original designation).
This genus appears to be poorly defined by Jeannel (1960), since the presence of three basal elytra foveae and discal and marginal spines of the pronotum, as well as a relatively short tergite 1 (IV) of the abdomen is shared by many related genera. All species described here possess a lateral frontal fovea, which may potentially serve as a synapomorphy of the genus, or of a broader group that contains Tribasodites . Two major lineages occur in Tibet. The first contains six species that have modified antennomeres 11 (and often antennomeres 10), relatively short postocular margins, lack of a distinct row of discal spines on the pronotum, and the aedeagus with a plate-like dorsal lobe that partially surrounds the ventral stalk of the median lobe. The second lineage also includes six species, with all having elongate and simple antennae, the postocular margins of the head are relatively much longer, the pronotum usually bears two distinct rows of discal spines, and the aedeagus often has an elongate and slender ventral stalk of the median lobe and dorsal lobe. Tribasodites vertexalis , which possesses simple antennae, a modified vertex, and has a different aedeagal form, is also placed here. Numerous undescribed species possessing male sexual and aedeagal characters of varying forms have been seen from China and other areas of Asia.
In Asia, Tribasodites contains many species that inhabit cave environments ( Yin et al. 2011d, 2015b; Yin & Zhou 2018; Yin & He 2020), and others were commonly collected in decomposing logs or under bark of dead fallen trees, often with ants or termites ( Nomura 1986; Zhao et al. 2010; Inoue & Maruyama 2020). However, there is no direct evidence, both ecologically or morphologically, indicating that these beetles are oblique myrmecophiles or termitophiles ( Sugaya & Maruyama 2003), because many species of Tribasodites were often found without ants/ termites from the same habitats. Tribasodites hubeiensis Yin, Nomura & Li , originally described from material collected in two caves in southern Hubei, was found in a leaf litter sample at Maoer Mountain (á儿山) of Guangxi (W.-X. Zhang & Z.-W. Yin unpublished data), some 500 km south from the type locality. It is inferred that at least some of the cavernicolous Tribasodites are loosely associated with cave habitats. The fact that most of the described species have been taken only in caves likely reflects inadequate sampling efforts in the surrounding environments. Three species described here and that are sympatric in Gyirong were collected under barks on the same day: T, gyirong, T, kiypu , T, pugiunculus .
The 13 Tibetan species may be distinguished by using the following key.
Key to Tibetan species of Tribasodites (male)
1 Vertex and frons each with large median tubercle ( Fig. 73B View FIGURE 73 ).................................... T. vertexalis View in CoL sp. nov.
- Vertex and frons simple, lacking modifications ( Figs 62–72 View FIGURE 62 View FIGURE 63 View FIGURE 64 View FIGURE 65 View FIGURE 66 View FIGURE 67 View FIGURE 68 View FIGURE 69 View FIGURE 70 View FIGURE 71 View FIGURE 72 , 74 View FIGURE 74 )................................................ 2
2 Antennomere 10 and/or 11 modified; pronotum lacking row of spines along discal carina; aedeagus with broad dorsal lobe partially surrounding ventral stalk of median lobe ( Figs 62–64 View FIGURE 62 View FIGURE 63 View FIGURE 64 , 66 View FIGURE 66 , 68 View FIGURE 68 , 72 View FIGURE 72 )........................................ 3
- Antenna simple, lacking modifications; pronotum often with row of spines along discal carina (spines lacking in two species that have modified metafemur); aedeagus usually with long and slender median and dorsal lobe (one species has broad dorsal lobe, but not partially surrounding ventral stalk) ( Figs 65 View FIGURE 65 , 67 View FIGURE 67 , 69–71 View FIGURE 69 View FIGURE 70 View FIGURE 71 , 74 View FIGURE 74 )......................................... 8
3 Antennomere 10 lacking impression or cavity on ventral side.................................................. 4
- Antennomere 10 with impression or cavity on ventral side ( Figs 62C View FIGURE 62 , 66D View FIGURE 66 , 68C View FIGURE 68 , 72D View FIGURE 72 ).............................. 5
4 Pronotum with small marginal spines ( Fig. 63B View FIGURE 63 ); mesofemur lacking spine on ventral margin........ T. cellulanus View in CoL sp. nov.
- Pronotum lacking marginal spines ( Fig. 64B View FIGURE 64 ); mesofemur with long ventral spine ( Fig. 64D View FIGURE 64 ) at base....................................................................................................... T. constrictus View in CoL sp. nov.
5 Head dark brown, much darker than pronotum and elytra which are reddish-brown ( Fig. 66A, B View FIGURE 66 ); antennomere 11 with broad, short prominence at base ( Fig. 66C View FIGURE 66 )....................................................... T. elongatus View in CoL sp. nov.
- Head, pronotum and elytra reddish-brown, unicolorous; antennomere 11 with distinctly much longer projection or protuberance at base.............................................................................................. 6
6 Antennomere 11 with markedly large and extended basal projection ( Fig. 62C View FIGURE 62 ); mesotibia with indistinct apical tubercle............................................................................................. T. bari View in CoL sp. nov.
- Antennomere 11 with distinct conical basal protuberance; mesotibia with large, blade-like apical spine.................. 7
7 Body length greater than 2.5 mm (2.68–2.78 mm); anterior portion of vertex with distinct transverse impression ( Fig. 68B View FIGURE 68 ); aedeagus ( Fig. 68I, J View FIGURE 68 )..................................................................... T. gyirong View in CoL sp. nov.
- Body length smaller than 2.5 mm (2.30–2.41 mm); anterior portion of vertex lacking distinct impression ( Fig. 72B View FIGURE 72 ); aedeagus ( Fig. 72I, J View FIGURE 72 )........................................................................ T. pugiunculus View in CoL sp. nov.
8 Body length greater than 2.5 mm (2.52–2.53 mm)............................................... T. kiypu View in CoL sp. nov.
- Body length smaller than 2.2 mm ......................................................................... 9
9 Metatibia expanded and with curved setose tuft on dorsal margin ( Fig. 70F View FIGURE 70 )........................ T. mirabilis View in CoL sp. nov.
- Metatibia simple..................................................................................... 10
10 Pronotum lacking row of spines along discal carina; metafemur modified........................................ 11
- Pronotum with row of spines along discal carina; metafemur simple............................................ 12
11 Head relatively broader, ratio (length/width) 43:47, eyes weakly prominent (with 35 ommatidia); dorsal lobe of aedeagus strongly twisted at apex ( Fig. 67H–J View FIGURE 67 )..................................................... T. grandiceps View in CoL sp. nov.
- Head relatively longer, ratio (length/width) 49:48, eyes markedly prominent (with 45 ommatidia); dorsal lobe of aedeagus slightly curved at apex ( Fig. 71H–J View FIGURE 71 ).................................................... T. prolixicornis View in CoL sp. nov.
12 Dorsal lobe of aedeagus conspicuously broad in dorsal view ( Fig. 65G View FIGURE 65 )............................ T. dilophus View in CoL sp. nov.
- Dorsal lobe of aedeagus long and slender in dorsal view ( Fig. 74H, J View FIGURE 74 ).............................. T. yatung View in CoL sp. nov.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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Pselaphinae |
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Batrisini |
Tribasodites Jeannel, 1960
Yin, Zi-Wei 2022 |
Tribasodites
Jeannel, R. 1960: 411 |
Jeannel, R. 1960: 412 |