Four new species of Xenotarsonemus (Acari: Tarsonemidae) from Brazil
Lofego, Antonio C.
De Moraes, Gilberto J.
Ochoa, Ronald
Zootaxa
2007
2007-11-26
1646
1
1
15
Lofego & De Moraes & Ochoa, 2007
Lofego & De Moraes & Ochoa
2007
[151,453,1601,1627]
Arachnida
Tarsonemidae
Xenotarsonemus
GBIF
Animalia
Acari
6
7
Arthropoda
species
cerrado
sp. nov.
( Figs.13–18)
Diagnosis.Females of this new species resemble Xenotarsonemus viridis( Ewing, 1939)but differ by having shorter tegula, extending to only half of length of leg IV; whereas in X. viridisit extends to the entire length of leg IV. Xenotarsonemus cerradoalso differs from X. viridisby having dorsal setae c 1, dand happroximately twice longer. Adult female( 3 specimensmeasured). Gnathosoma: capsule subcircular, length 27; dorsal apodeme indistinct. Setae ch10 (10–11) and vm6, smooth; seta ppnot seen. Palpus short, with 2 small subterminal setae and terminal cone-shaped structures. Pharynx fusiform, 16 long and 6 wide at widest region. FIGURES 9–12. Xenotarsonemus pirassunungaensis(female). 9, leg I; 9’, sensorial cluster; 10, leg II; 11, leg III; 12, leg IV. Idiosoma( Figs. 13and 14): length 167 (150–185), width at level of c 1107 (105–110); prodorsal shield covering gnathosoma. Stigma on lateral of prodorsal shield, slightly closer to bases of setae v 1than of sc 2. Lengths of the setae: v 124 (22–25), sc 115, sc 235 (34–38), c 130 (29–32), c 229 (27–32), d29 (28–30), e20 (18–23), f25 (24–27), h33 (29–35). All setae, except sc 1, serrate and setiform; sc 1capitate and with tiny spines. Distances between dorsal setae: v 1-v 131 (29–34), sc 2-sc 252 (50–55), v 1-sc 219 (18–22), c 1-c 171 (68– 72) c 2-c 295 (90–100), c 1-c 228 (25–29), d-d36 (35–37), f-f13 (12–14), e-f22 (22–23), h-h31 (31–32). Seta sc 1inserted anteriorly to sc 2. FIGURE 13. Xenotarsonemus cerrado(female). Dorsum. Coxisternal setae 1a9 (8–9), near middle of apodeme I; 2a13 (13–14), near middle of apodeme II; 3a17 (16–18), near anterior end of apodeme III; 3b12 (10–14), near external margin of posterior end of apodeme IV. Apodeme I conspicuous, fused to anterior end of prosternal apodeme. Apodeme II not fused to prosternal apodeme. Prosternal apodeme conspicuous, diffuse near sejugal apodeme, with a bifurcate node on anterior third. Sejugal apodeme uninterrupted. Apodeme III with anterior end foot-like, extending diagonally from proximity of base of seta 3ato anterior margin of trochanter III. Apodeme IV extending diagonally from the middle of the poststernal apodeme to base of seta 3b; diffuse on anterior third. Poststernal apodeme bifurcate anteriorly. Coxistenal plates smooth. Tegula elongate and pointed, 16 long and 5 wide. All ventral setae smooth. FIGURE 14. Xenotarsonemus cerrado(female). Venter. Legs( Figs. 15–18): lengths (femur to tarsus): leg I 47 (46–49), leg II 45 (44–47), leg III 55 (52–58), leg IV 30 (28–32). Number of setae (solenidia in parentheses) on femur, genu, tibia and tarsus, respectively: leg I: 4-4-5(2)-8(1), leg II: 3-3-4-6(1), leg III: 1+3-4-5. Tarsal solenidion ω of tibiotarsus I 6, stout, narrow near base. Sensory cluster of tibia I complete, solenidion Φ1 3, slender, capitate; solenidion Φ 23, stout, narrow near base; famulus k5 (4-5); Φ 2is the most proximal and kthe most distal element of the cluster. Seta dof tibia I 29 (27–31), serrate. Solenidion ω of tarsus II proximal, 5 (5–6) long, stout, narrow near base; seta pl´´6, spinelike, inserted on the middle of tarsus II. Seta dof tibia II 11 (11–12), serrate. Femorogenu IV 24 (22–25); tibiotarsus IV 6 (5–7). Lengths of setae of leg IV: v´F11 (10–12), v´G18 (16–19), v´Ti33 (32–35) and tc´´42 (41–44); all setae smooth. Adult male: unknown.
Type material: holotypefemale from Campomanesia pubescens(DC.), Pirassununga, State of São Paulo, Brazil, 03/ V/2000, A.C. Lofego, deposited at ESALQ/ USP; 2 paratype females, from São José do Rio Preto, State of São Paulo, Brazil, 24/IV/1992, R.J. F. Feres, one on Desmodium canum(J.F.Gmel.) (Fabaceae)and the other on an unidentified plant, both specimens are deposited at DZSJRP.
Etymology:the species name cerradorefers to vegetation typeof the region where the typespecimens were collected.