Beardius Reiss et Sublette

Pinho, Luiz Carlos, Mendes, Humberto Fonseca & Andersen, Trond, 2013, Revision of Beardius Reiss et Sublette, 1985 (Diptera: Chironomidae), with the description of twenty new species, Zootaxa 3742 (1), pp. 1-78 : 4-5

publication ID

https://doi.org/ 10.11646/zootaxa.3742.1.1

publication LSID

lsid:zoobank.org:pub:78959DF2-CFF7-442A-B7B3-0B1A053A4D73

persistent identifier

https://treatment.plazi.org/id/DB2587A5-E46D-FFD0-FF19-66C17AC2FB41

treatment provided by

Felipe

scientific name

Beardius Reiss et Sublette
status

 

Beardius Reiss et Sublette View in CoL View at ENA

Beardius Reiss et Sublette, 1985: 175 View in CoL .

Beardius Reiss et Sublette View in CoL ; Andersen & Saether (1996: 34), Jacobsen & Perry (2000: 130).

Type species: Beardius parcus Reiss et Sublette, 1985: 183 View in CoL , by original designation.

Other included species: Beardius abbadi sp. n.; B. aciculatus Andersen et Saether, 1996 View in CoL ; B. arawak sp. n.; B. bizzoi sp. n.; B. breviculus Reiss et Sublette, 1985 View in CoL ; B. bucephalus sp. n.; B. chapala sp. n.; B. cristhinae View in CoL Trivinho-

Strixino et Siqueira, 2007; B. curticaudatus sp. n.; B. dioi sp. n.; B. fittkaui Pinho, Mendes et Andersen, 2009 ; B. hirtidorsum sp. n.; B. krenak sp. n.; B. kumadueni sp. n.; B. lingulatus Andersen et Saether, 1996 View in CoL ; B. longicaudatus sp. n.; B. mileneae sp. n.; B. nebularius sp. n.; B. neusae sp. n.; B. novoairensis sp. n.; B. phoenix sp. n.; B. phytophilus Trivinho-Strixino et Strixino, 2000 View in CoL ; B. reissi Jacobsen, 2000 View in CoL ; B. roquei Trivinho-Strixino et Siqueira, 2007 View in CoL ; B. sapiranga sp. n.; B. triangulatus Andersen et Saether, 1996 View in CoL ; B. truncatus Reiss et Sublette, 1985 View in CoL ; B. tupinamba sp. n.; B. urupeatan Pinho, Mendes et Andersen, 2009 ; B. vanessae sp. n.; B. xylophilus View in CoL Trivinho- Strixino et Strixino, 2000; B. yperoig sp. n.

The diagnosis of the adults is emended based on Andersen & Saether (1996) and Jacobsen & Perry (2000). When describing the new species it became evident that the structure previously regarded as the median volsella in fact is two different structures. Previously the median volsella in Beardius View in CoL has been regarded as a very plastic structure, varying from a low wart-like tubercle bearing long setae as in B. phytophilus View in CoL ( Fig. 1 View FIGURES 1–10 ), to a long, triangular to rounded microtrichiose projection as in B. lingulatus View in CoL ( Fig. 3 View FIGURES 1–10 ) and B. urupeatan ( Fig. 6 View FIGURES 1–10 ), sometimes bearing long lamellae as in B. xylophilus View in CoL ( Fig. 151 View FIGURES 150–151 ). However, in the hypopygium of for instance B. phoenix sp. n. or B. dioi sp. n. two structures which can be interpreted as the median volsella are evident, both a proximal wart-like tubercle and a distal microtrichiose projection ( Figs 2, 7, 8 View FIGURES 1–10 ). The median volsellae in other Chironomini View in CoL genera are usually either wart-like, as in Microtendipes Kieffer View in CoL and Oukuriella Epler View in CoL , or somewhat longer and cylindrical, as in Nilothauma Kieffer View in CoL and Paratendipes Kieffer View in CoL , both types bearing one to several apical setae. Thus, the median volsella in Beardius View in CoL is most likely to be the proximal wart-like tubercle with strong apical setae, as described for B. phytophilus View in CoL , B. cristhinae View in CoL , B. roquei View in CoL , B. parcus View in CoL and B. reissi View in CoL .

The distal microtrichiose “median volsella” is to a varying degree attached to the inferior volsella ( Figs 8–10 View FIGURES 1–10 ) and in some of the new species, like in B. phoenix sp. n. ( Fig. 2 View FIGURES 1–10 ), B. arawak sp. n. ( Fig. 4 View FIGURES 1–10 ), and B. novoairensis sp. n. ( Fig. 5 View FIGURES 1–10 ) arises from the very base of the inferior volsella. This structure is thus regarded as part of the inferior volsella and is called the basal lobe or basal projection of the inferior volsella below.

Both structures, the median volsella and the microtrichiose projection of the inferior volsella may be present or absent and the description of some of the previous named species is emended below accordingly. However, when only one structure is present, our interpretation might be questionable for a few species. We have for instance interpreted the structure in B. curticaudatus sp. n. and B. xylophilus View in CoL sp. n. as being a projection of the inferior volsella rather than a median volsella, even though it might resemble the median volsella in many Tanytarsini View in CoL species.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Chironomidae

Loc

Beardius Reiss et Sublette

Pinho, Luiz Carlos, Mendes, Humberto Fonseca & Andersen, Trond 2013
2013
Loc

Beardius Reiss et Sublette

Jacobsen, R. E. & Perry, S. A. 2000: 130
Andersen, T. & Saether, O. A. 1996: 34
1996
Loc

Beardius Reiss et Sublette, 1985: 175

Reiss, F. & Sublette, J. E. 1985: 175
1985
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