Itanura brasiliensis ( Arlé, 1959 )

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: 142-146

publication ID

http://dx.doi.org/10.11646/zootaxa.4020.1.5

publication LSID

lsid:zoobank.org:pub:3989C109-39F2-43FA-A5B1-B51B859A1BA4

persistent identifier

http://treatment.plazi.org/id/038187C0-945A-116E-FF31-F996FE324FAB

treatment provided by

Plazi

scientific name

Itanura brasiliensis ( Arlé, 1959 )
status

comb. nov.

Itanura brasiliensis ( Arlé, 1959)  comb. nov.

Figs 17–21View FIGURE 17View FIGURES 18 – 21; Tabs 4, 5

Neanura brasiliensis Arlé, 1959 

Paleonura brasiliensis ( Arlé, 1959)  comb. nov. in Cassagnau & Oliveira, 1990

Material examined. Lectotype of Neanura brasiliensis Arlé, 1959  hereby designated. One female (slide 241). Itajubá, MG, Brazil. Leaf litter of Atlantic Forest. 11.x. 1957. About 950 m a.s.l. Arlé, R. leg. Deposited at MNRJAbout MNRJ. Paralectotypes of Neanura brasiliensis Arlé, 1959  : one female on slide with lectotype; same data as lectotype. Deposited at MNRJAbout MNRJ. One male, one female and one juvenile (slide 246). Itajubá, MG, Brazil. Leaf litter of Atlantic Forest. 12.x. 1957. About 950m a.s.l. Arlé, R. leg. Deposited at MNHNAbout MNHN.

Other material examined. Cassagnau collection: four females on slide 753 (1); two specimens on slide 753 (2); three specimens on slide 753 (3); two females and four juveniles on slide 753 (4); three females and four juveniles on slide 753 (5). Itajubá, MG, Brazil. Leaf litter of Atlantic Forest. 1961. About 950 m a.s.l. Arlé, R. leg. Locality. Itajubá municipality, Minas Gerais State, Brazil. About 950 m a.s.l. Local approximate coordinates: 22 ° 25 ′ 33 ″S, 45 ° 27 ′ 10 ″W. Leaf litter of Atlantic Forest.

Redescription. Length 0.50–1.01mm (n= 5). Colour white in ethanol. Eyes 2 + 2, their diameter twice the length of Ocm socket diameter. Habitus stocky ( Fig. 17View FIGURE 17). Weak cryptopygy. Head and tergite tubercles moderately developed, differentiated in bosses, with tertiary granulation. Dorso-internal area of head and Th I –Abd IV without elementary tubercles. No reticulations. No plurichaetosis. No button-hole structures on tergites.

Dorsal chaetotaxy constituted of ordinary chaetae and S-chaetae. Ordinary chaetae differentiated in dorsal macrochaetae of similar length and morphology, rather small, with serrations covering the apical 1 / 3 of their length, rounded apically; 1 + 1 mesochaetae of CL and 3 mesochaetae of (L+So) on head, 3 mesochaetae of L on abd IV and 2 of (DL+L) on Abd V smooth and acuminate; microchaetae, thinner, shorter, bent, acuminate, smooth. S-chaetae thinner, smaller than closest macrochaetae.

Antennae shorter than head, less than two times as long as wide at basis. Ant I with 7 chaetae, Ant II with 11 chaetae. Ant III organ with 5 S-chaetae, guard chaetae Sgd and Sgv slightly longer and slender than S-chaetae of Ant IV. Ant IV organite as a very small rod, almost entirely burried in the integument; apical bulb as a single mass, fused to Ant IV tip. Eight subequal S-chaetae (S 1 –S 8) on Ant IV.

Buccal cone moderately elongated. Maxilla styliform, mandible thin and probably bidentate. Labrum rounded apically ( Fig. 18View FIGURES 18 – 21), elongated, labral formula?/? 2,4. Labium with 4 basal, 3 distal and 3 lateral chaetae; x-papillae not observed.

Head chaetotaxy as in Table 4, with 12 chaetal groups: CL, Af, 2 Oc, 2 Di, 2 De, 2 DL, 2 (L+So). Tubercles moderately developed, Af composed of 8–9 elementary tubercles, separated from Oc and CL ( Fig. 19View FIGURES 18 – 21). Central area with A, B, D, F, G, Oca, Ocm and Ocp (C, E, H and O absent; A, B and F, G on the border of tubercles, D free). No tubercle Di (Di 1 free).

Tergite chaetotaxy illustrated on Fig. 17View FIGURE 17. Tubercles moderately developed, most visible laterally from head to Abd VI. No tubercles Di from Th I to Abd IV. Th II –III with 3 chaetae Di. Tubercle De of Th –III with 3 chaetae (De 1 and De 3 as M, De 2 as mi) and 1 S-chaeta. Abd V with tubercles Di adjacent on the axis, separated from De; two chaetae VL(+?L) located ventrally, without tubercle. Tubercle Di of Abd V with Di 1 M, Di 2 as mi and Di 3 absent. Abd VI bilobed. S-chaetotaxic formula: 2 +ms, 2 / 11111.

Tita without chaeta M and with B 4 –B 5 not longer than other long chaetae ( Fig. 20View FIGURES 18 – 21). Claw untoothed, not striated in its basal part, and devoid of secondary granulation.

Ventral chaetotaxy of Abd I –VI as in Fig. 21View FIGURES 18 – 21. Furcal rest with 3 chaetae, apparently devoid of mi. Postcephalic chaetotaxy summarized in Table 5.

Material examined. Two females (# 2147 CM/ MNRJAbout MNRJ), 15.vii. 2011, Queiroz G.C. leg. Deposited at MNRJAbout MNRJ in Brazil and MNHNAbout MNHN in Paris, France. Locality. Parque Nacional do Itatiaia (ICMBio), Itatiaia municipality, Rio de Janeiro State, Brazil. 2300–2500 m a.s.l. Local coordinates: 22 º 22 ' 59 "S, 44 º 40 ' 1 "W. Leaf litter and soil of "campos de altitude".

Remarks. Labium with 2 x-papillae visible ( Fig. 24View FIGURE 23 – 27). Head with Af composed of 7–8 tubercles separated from Oc and CL. Leg chaetotaxy of legs I –III as follows: Scx 2 – 0, 2, 2; Cx – 3, 8, 8; Tr – 6, 6?, 6?; Fe – 12?, 11, 10?; Tita – 18, 18, 17. Furcal rest with 3 chaetae, devoid of mi; Ve chaetae, on ventral anal valves, 11–12 ( Fig. 26View FIGURE 23 – 27). For other differences see Table 6.

TABLE 4. Dorsal Cephalic chaetotaxy of Itanura brasiliensis (Arlé, 1959) comb. nov. from Itajubá-MG, type locality.

Group of chaetae Tubercle Number of chaetae Type of chaetae
L1, L4, So1 L2, So3, So4, So6

TABLE 5. Postcephalic chaetotaxy of Itanura brasiliensis (Arlé, 1959) comb. nov. from Itajubá-MG, type locality.

Scx2 Cx Tita
3+S
3+S

TABLE 4. Dorsal Cephalic chaetotaxy of Itanura brasiliensis (Arlé, 1959) comb. nov. from Itajubá-MG, type locality.

Group of chaetae Tubercle Number of chaetae Type of chaetae
L1, L4, So1 L2, So3, So4, So6
MNRJ

Museu Nacional/Universidade Federal de Rio de Janeiro

MNHN

Museum National d'Histoire Naturelle

Kingdom

Animalia

Phylum

Arthropoda

Class

Entognatha

Order

Collembola

Family

Neanuridae

Genus

Itanura

Loc

Itanura brasiliensis ( Arlé, 1959 )

Queiroz, Gabriel C. & Deharveng, Louis 2015

2015
Loc

Neanura brasiliensis Arlé, 1959

Arle 1959

1959
Loc

Paleonura brasiliensis ( Arlé, 1959 )

Arle 1959

1959