Four new species of Xenotarsonemus (Acari: Tarsonemidae) from Brazil
Author
Lofego, Antonio C.
Author
De Moraes, Gilberto J.
Author
Ochoa, Ronald
text
Zootaxa
2007
2007-11-26
1646
1
1
15
https://www.biotaxa.org/Zootaxa/article/view/zootaxa.1646.1.1
journal article
10.11646/zootaxa.1646.1.1
11755334
5103781
E277A2B1-D0D3-4D6C-B05B-6269CFA66AB1
Xenotarsonemus 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. viridis
it extends to the entire length of leg IV.
Xenotarsonemus cerrado
also differs from
X. viridis
by having dorsal setae
c
1
,
d
and
h
approximately twice longer.
Adult female
(
3 specimens
measured).
Gnathosoma
: capsule subcircular, length 27; dorsal apodeme indistinct. Setae
ch
10 (10–11) and
vm
6, smooth; seta
pp
not 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. 13
and
14
): length 167 (150–185), width at level of
c
1
107 (105–110); prodorsal shield covering gnathosoma. Stigma on lateral of prodorsal shield, slightly closer to bases of setae
v
1
than of
sc
2
. Lengths of the setae:
v
1
24 (22–25),
sc
1
15,
sc
2
35 (34–38),
c
1
30 (29–32),
c
2
29 (27–32),
d
29 (28–30),
e
20 (18–23),
f
25 (24–27),
h
33 (29–35). All setae, except
sc
1
, serrate and setiform;
sc
1
capitate and with tiny spines. Distances between dorsal setae:
v
1
-v
1
31 (29–34),
sc
2
-sc
2
52 (50–55),
v
1
-sc
2
19 (18–22),
c
1
-c
1
71 (68– 72)
c
2
-c
2
95 (90–100),
c
1
-c
2
28 (25–29),
d-d
36 (35–37),
f-f
13 (12–14),
e-f
22 (22–23),
h-h
31 (31–32). Seta
sc
1
inserted anteriorly to
sc
2
.
FIGURE 13.
Xenotarsonemus cerrado
(female). Dorsum.
Coxisternal setae
1a
9 (8–9), near middle of apodeme I;
2a
13 (13–14), near middle of apodeme II;
3a
17 (16–18), near anterior end of apodeme III;
3b
12 (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
3a
to 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
2
3, stout, narrow near base; famulus
k
5 (4-5); Φ
2
is the most proximal and
k
the most distal element of the cluster. Seta
d
of 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
d
of tibia II 11 (11–12), serrate. Femorogenu IV 24 (22–25); tibiotarsus IV 6 (5–7). Lengths of setae of leg IV:
v´F
11 (10–12),
v´G
18 (16–19),
v´Ti
33 (32–35) and
tc´´
42 (41–44); all setae smooth.
Adult male
: unknown.
Type material:
holotype
female 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
cerrado
refers to vegetation
type
of the region where the
type
specimens were collected.