A review of the genus Tycherobius (Acari: Camerobiidae), with descriptions of four new species from Australia
Author
Fan, Qing-Hai
Author
Walter, David E.
text
Zootaxa
2006
1121
1
52
journal article
50772
10.5281/zenodo.171702
1edf6823-9117-4b17-bf91-eb07b79403d4
11755326
171702
Tycherobius elongata
sp. n.
(Plate 4;
Figs. 29–32
,
33
)
Material examined
Holotype
: adult male, from forest litter, 27°33'S, 153°03'E, Toohey Forest, Nathan, Brisbane, Queensland,
Australia
, coll. H.C. Proctor,
21 Mar 1999
. In QM.
Diagnosis
Adult male. Peritremes with 2 loops; palptarsus with 2 + 1 eupathidium + 1;
pdx
present; idiosomal setae lanceolate,
c1
much longer than others;
c1
:
c2
= 3.1,
d1
:
d2
= 0.9,
e1
:
e2
= 1.3,
c1
:
d1
:
e1
:
f1
= 5.4: 1.4: 1.4: 1.0; femora with 4, 3, 3, 2; tarsi I–II with 9 + 1, 8 + 1; tibia I with an additional long terminal solenidion and each tarsus with an elongate solenidion.
Description
ADULT
MALE (Plate 4;
Figs. 29–32
)
Gnathosoma
. Stylophore stumpy, 47; movable digits 22; peritremes with two loops. Palp 42; counts of setae and solenidia from trochanter to tarsus: 0, 2, 1, 3 + 1 claw, 2 + 1 eupathidia + 1 solenidion (). Subcapitular setae
m
20, distance
m–m
, 25.
Idiosoma
. Hysterosoma tapered, 227 long, 181 wide. Prodorsum bearing one pair of eyes,
7 in
diameter, one pair of postocular bodies,
12 in
diameter, and five pairs of lanceolate setae,
c1
obviously longer than others setae,
vi
39
,
ve
21,
sci
21,
sce
20,
pdx
17; ratio
vi
:
ve
= 1.9; distances:
vi–
vi
34,
vi–ve
25,
vi–pdx
22,
ve–sci
20,
sci–sce
40. Hysterosoma bearing ten pairs of setae,
c1
108,
c2
35,
d1
28,
d2
30,
e1
27
,
e2
21
,
f1
20,
f2
23,
h1
13,
h2
20; ratios
c1
:
c2
= 3.1,
d1
:
d2
= 0.9,
e1
:
e2
= 1.3,
c1
:
d1
:
e1
:
f1
= 5.4: 1.4: 1.4: 1.0; distances:
c1–c1
20,
c1–c2
77,
c1–d1
67,
d1–d1
10,
d1–d2
55,
d1–
e
1
35,
e1–
e
1
12,
e1–
e
2
50,
e1–f1
37,
f1–f1
10,
f1–f2
24,
f1–h1
27,
h1–h1
7,
h1–h2
12. Venter with three pairs of setae,
1a
18,
3a
25,
4a
15; coxal setae
1c
1.3x of
1b
,
1b
23,
1c
30. Aggenital and genital setae absent; genitoanal valves with four pairs of setae,
g
13,
ps3
12,
ps2
12,
ps1
13.
FIGURE 29.
Tycherobius elongata
sp. n.
(adult male). Dorsal view of idiosoma.
Legs
. Length (from base of trochanter to tip of tarsus): leg I 523, leg II 412, leg III 467, leg IV 552. Setae on genua lanceolate, IV> III> II> I, length:
I 27
, II 30,
III 49
,
IV 62
. Tibiae I with two solenidia,
I 68
and
I 16
; tibiae II–IV each with one solenidion: II
8,
III 9
,
IV 10
; ratio I: I = 4.3, I: II = 8.5. Tarsi I–IV each with one solenidia:
I 55
,
II 50
,
III 38
, IV 31. Counts of setae and solenidia on legs I–IV: coxae
1a
+ 2, 1, 2, 2; trochanters 1, 1, 1, 1; femora 4, 3, 3, 2; genua 1 + 1, 1 + 1, 1, 1; tibiae 9 + 2, 8 + 1, 7 + 1, 7 + 1; tarsi 9 + 1, 8 + 1, 7 + 1, 7 + 1.
FIGURE 30.
Tycherobius elongata
sp. n.
(adult male). Ventral view of idiosoma.
FIGURE 31.
Tycherobius elongata
sp. n.
(adult male). A, chelicerae; B, palp; C, subcapitulum; D, aedeagus and genitoanal valves; E, dorsal idiosomal setae; F, tarsus I; G, tarsus II.
FIGURE 32.
Tycherobius elongata
sp. n.
(adult male). A, leg I; B, leg II; C, leg III; D, leg IV.
FIGURE 33
. Geographic distribution of
Tycherobius stipula
sp. n.
,
T. australis
sp. n.
,
T. acicula
sp. n.
,
T. variegata
sp. n.
and
T. elongata
sp. n.
Remarks
Adult males of this species are similar to that of
T. turcicus
Ayy
₁ld₁z &
Doğan,
2003
in having a pair of
pdx
and a similar apperance, but differs from the latter in having 9 + 1 (vs: 8 + 1) on tarsus I, 2 (vs: 1 seta) palptarsal setae, setae
c1
being 3.1x of
c2
(vs: 1.4), and ratio
c1
:
d1
:
e1
:
f1
= 5.4: 1.4: 1.4: 1.0 (vs: 3.0: 1.7: 1.3: 1.0).