Nilothauma reissi (Soponis) Soponis, 2009

Mendes, Humberto Fonseca & Andersen, Trond, 2009, Neotropical Nilothauma Kieffer, 1921, with the description of thirteen new species (Diptera: Chironomidae), Zootaxa 2063, pp. 1-45 : 31-32

Nilothauma reissi (Soponis) comb. n.

( Figs 49–51 )

Paranilothauma reissi Soponis, 1987: 13 , Figs 1–11 ; Spies and Reiss (1996: 71).

Material examined. BRAZIL: Amazonas: Rio Itu, tributary of middle Rio Negro, male paratype with pupal exuviae, 13.ii.1962, E. J. Fittkau, reared (A 348–1, ZSM); Amazonas: Lago do Calado, near Manpuru, Rio Solimões, 1 male with pupal exuviae, 12.ii.1972, F. Reiss, reared Series XIII ( ZSM). BRAZIL: Minas Gerais: Santa Rita de Cássia, 20º51'S, 46º58'W, 2 males, 18.vi.2000, light trap, H. F. Mendes. BRAZIL: São Paulo: Luis Antônio, Estação Ecológica do Jataí, 21º33'– 21º37'S, 47º45'– 47º51'W, 1 male, 2003, M. Peláez- Rodríguez; 1 male, as previous except 17.x.2001, S. Trivinho-Strixino ( ZMBN, UFSCar, MZUSP).

Diagnostic characters. The absence of dorsal lobe(s) on tergite IX and anal point combined with a pediform superior volsella, median volsella apparently represented by two strong, curved setae on short tubercles basally on superior volsella, and R1 without setae separate the male of N. reissi from all other Nilothauma species. The pupa can be separated from other known Neotropical pupae by having a thoracic horn with 8 branches and tergites VII–VIII with anterior shagreen patches only.

Male and pupa. The male and pupa are described in detail by Soponis (1987). Hypopygium and superior volsella as in Figures 49–51 .

Female and larva. Unknown.

Distribution. The species was originally described from the Amazonian region; the range is now extended to include São Paulo and Minas Gerais States in southeastern Brazil.

Figures

FIGURES 49 – 51. Nilothauma reissi (Soponis) comb. n., male. 49 — dorsal aspect of hypopygium. 50 — hypopygium with tergite IX and anal point removed, dorsal view left, ventral view right. 51 — superior volsella, dorsal view.

FIGURES 1 – 2. Parsimony analysis of Nilothauma Kieffer species with Paratendipes Kieffer and Pseudochironomus Malloch fixed as outgroup. Characters and character states as in text, matrix of characters as in Appendix 1. strict consensus of shortest tree. 2 — strict consensus of shortest tree after reweighting according to rescaled consistency index.

FIGURES 3 – 4. Parsimony analysis of Nilothauma Kieffer species with Paratendipes Kieffer and Pseudochironomus Malloch fixed as outgroup. Characters and character states as in text, matrix of characters as in Appendix 1. 3 — strict consensus of shortest tree after reweighting according to rescaled consistency index. 4 — area cladogram based on the consensus tree. Abbreviations: AC = Acre State, AM = Amazonas State, ES = Espírito Santo State, MT = Mato Grosso State, SP = São Paulo State.