Itanura brasiliensis, Queiroz, Gabriel C. & Deharveng, Louis, 2015

Queiroz, Gabriel C. & Deharveng, Louis, 2015, New genus, new species and new record of Neanurinae (Collembola, Neanuridae) for the Neotropics, Zootaxa 4020 (1), pp. 134-152 : 146-151

Itanura brasiliensis comb. nov., specimens from Serra dos Órgãos, Rio de Janeiro State

Figs 28–34

Material examined. Female (#2313 CM/ MNRJ), 15.iii.2012, Queiroz G.C. leg. Deposited at MNRJ in Brazil. One male (#2212 CM/ MNRJ), 10.xi.2011, Queiroz G.C. leg. Deposited at MNHN in Paris, France. Locality. Parque Nacional da Serra dos Órgãos (ICMBio), Teresópolis municipality, Rio de Janeiro State, Brazil. 2100 m a.s.l. Local coordinates: 22º27'38"S, 43º1'45"W. Leaf litter and soil of "campos de altitude".

Remarks. Labium with 2 x-papillae visible ( Fig. 30 ). Head with Af composed of 7–8 tubercles separated from Oc and CL. Leg chaetotaxy of legs I–III as follows: Scx2– 0, 2, 2; Cx– 3, 7, 8; Tr– 6, 6, 6; Fe– 13, 12, 11; Tita– 18, 18, 17. Furcal rest with 4 chaetae, devoid of mi; Ve chaetae, on ventral anal valves, 13 ( Fig. 32 ). For other differences see Table 6 .

Discussion. The specimens of the three localities where Itanura brasiliensis comb. nov. was found are extremely similar, yet differences on important details of chaetotaxy and tubercle development are noteworthy ( Table 6 ). In this way, they recall the pattern of closely related subspecies within Deutonura deficiens ( Deharveng, 1984) , suggesting that sampling intermediate locations in this Brazilian region may disclose a complex of parapatric forms (with narrow hybrid or overlapping zones), leading to upgrade these three populations to either subspecies or species level.

ET=elementary tubercle. *one asymmetric specimen with 3+S on left side and 4+S on right side and another specimen with 2+S on left side and 3+S on right side.

Figures

FIGURE 28. Dorsal chaetotaxy of Itanura brasiliensis comb. nov. from Serra dos Órgãos, RJ. Scale bar: 80 µm.

FIGURE 29 – 34. Itanura brasiliensis comb. nov. from Serra dos Órgãos, RJ. 29. Dorsal chaetotaxy of Ant III – IV; 30. Labium; 31. Tita I; 32. Ventral chaetotaxy of Abd I – VI; 33. Female genital plate; 34. Male genital plate. Scale bars: 20 µm (Figs 29 – 31, 33, 34); 40 µm (Fig. 32).

Tables

TABLE 6. Main differences between specimens of Itanura brasiliensis comb. nov. from the studied localities.

	Itajubá – MG (type locality)	Itatiaia – RJ	Serra dos Órgãos – RJ
N of ET on DL of head	5	6	5
N of ET on (L+So) of head	3–4	5	3
N of ET on De of Abd I–III	1–2	3–4	3–4
De2 of Abd I–III / tubercles	out	on edge	on edge
N of chaetae De+DL of Abd V	3+S*	3+S	4+S
N of chaetae VL(+?L) of Abd V	2	3	3