Description of five new species of the genus Stigmaeus Koch (Acari: Raphignathoidea: Stigmaeidae) from Turkey
Author
Doğan, Sibel
Author
Doğan, Salih
Author
Erman, Orhan
text
Zootaxa
2017
4276
4
451
478
journal article
32846
10.11646/zootaxa.4276.4.1
4819771b-1204-45ae-8cc1-2ea1c1bd7c69
1175-5326
807819
F75E595B-8D3C-424E-ADBE-B761B1D59638
Stigmaeus fimus
sp. nov.
Female
(
n
= 5) (
Figs. 6–8
). Length of body 680 (657–677), width 456 (420–450).
Gnathosoma
139 (138–147). Leg I 315 (317–333), leg II 278 (258–284), leg III 283 (265–296), leg IV 291 (277–302).
Dorsum of idiosoma.
All dorsal shields polygonally reticulated, distinctly visible on both central and lateral margins of dorsal shields. Propodosomal shield triangular and bearing setae
vi
,
ve
and
sci
. A pair of
pob
present, 60 (58–64) in diameter. Eyes and apodemal marking absent.
sce
on minute platelets laterally.
c
1 and
d
1 on central shield.
d
2 located on marginal shield.
e
1 on divided median zonal shields.
e
2 located on lateral zonal shields. Intercalary shield divided and transversely elongated, and bearing setae
f
1. Suranal shield undivided and bearing two pairs of setae,
h
3 absent. Humeral shields placed on lateral body, having setae
c
2. Dorsum with 13 pairs of setae. Setae
ve
pointed and slightly barbed distally, all dorsal setae distinctly barbed distally except setae
c
2 smooth and the longest. Lengths of dorsal idiosomal setae:
vi
93
(86–94),
ve
140 (143–149),
sci
71 (72–76),
sce
99 (104–118),
c
1 86 (83–93),
c
2 150 (154–160),
d
1 84 (82–93),
d
2 90 (88–91),
e
1 83 (85–96),
e
2 105 (101–104),
f
1 99 (93–101),
h
1 103 (97–101),
h
2 84 (86–93). Distances between dorsal idiosomal setae:
vi -
vi
33 (33–37),
ve -ve
106 (102–105),
vi - ve
67 (56–66),
sci -sci
190 (187–191),
ve -sci
63 (64–68),
sce -sce
273 (280–291),
sci -sce
49 (43–48),
c
1-
c
1 98 (90– 94),
d
2-
d
2 340 (325–340),
c
1-
d
1 104 (106–108),
c
1-
d
2 140 (125–135),
d
1-
d
1 108 (94–111),
d
2-
d
1 101 (97–120),
e
2-
e
2 362 (350–357),
d
2-
e
2 132 (125–131),
d
1-
e
1 97 (90–95),
d
1-
e
2 112 (110–155),
e
1-
e
1 107 (96–105),
e
2-
e
1 119 (108– 125),
f
1-
f
1 174 (169–186),
e
1-
f
1 104 (74–100),
e
2-
f
1 110 (106–118),
f
1-
h
1 103 (86–99),
f
1-
h
2 94 (59–93),
h
1-
h
1 61 (50– 63),
h
2-
h
2 152 (150–155),
h
1-
h
2
47 (45–51). Ratio of seta
ve
/
sci
1.9 (2.0).
Venter of idiosoma
. Coxisternal shields divided, with reticulum and bearing three pairs of intercoxal setae (
1a
,
3a
,
4a
). Aggenital shields entire with reticulum and having three pairs of setae (
ag
1-3),
ag
3 longer and thicker than others. Anogenital shields smooth, bearing a pair of genital (
g
1) and three pairs of pseudanal setae (
ps
1-3).
ps
1 bluntended weakly barbed distally and much longer than other pseudanal setae.
ps
2 and
ps
3 smooth and pointed. Lengths and distances of these setae:
1a
42 (40–43),
3a
38 (35–42),
4a
38 (37–42),
1a -1a
39 (33–40),
3a -3a
62 (59–66),
4a - 4a
59 (57–58),
ag
1 38 (39–42),
ag
2 43 (39–42),
ag
3 51 (50–55),
g
1 26 (22–23),
ps
1 65 (64–68),
ps
2 45 (42–44),
ps
3 40 (37–39).
FIGURE 6.
Stigmaeus fimus
sp. nov.
(Female) A Dorsal view of idiosoma, B. Ventral view of idiosoma.
FIGURE 7.
Stigmaeus fimus
sp. nov.
(Female) Some dorsal setae.
FIGURE 8.
Stigmaeus fimus
sp. nov.
(Female) A. Leg I, B. Leg II, C. Leg III, D. Leg IV.
Gnathosoma
. Chelicerae 161 (160–169). Palp 185 (177–186), with reticular patterns. Subcapitulum reticulated, with two pairs of adoral setae (
or
1,2) and two pairs of subcapitular setae. Lengths and distances of these setae:
m
38 (35–39),
n
31 (26–30),
m -m
47 (44–46),
n -n
31 (28–37),
m -n
28 (22–29).
Legs
. Leg segments with reticulum. Counts of setae and solenidia on legs I–IV: coxae 2–2–2–2, trochanters 1– 1–2–1, femora 6–5–3–2, genua 3(+1κ)–3(+1κ)–1–1, tibiae 5(+1φ+1φρ)–5(+1φρ)–5(+1φρ)–5(+1φρ), tarsi 13(+1ω)–9(+1ω)–7(+1ω)–7(+1ω).
Male
(
n
= 2) (
Figs. 9
,
10
). Length of body 403–439, width 230–283.
Gnathosoma
113–119. Length of legs: Leg I 246–262, leg II 203–230, leg
III 19 8
–211, leg IV 221–239.
Dorsum of idiosoma
. As in female except median zonal shield undivided.
pob
36–40 in
diameter. All dorsal idiosomal setae faintly barbed as in female except
ve
tapering towards tip. Lengths of dorsal idiosomal setae:
vi
53
– 64,
ve
104–121,
sci
43–47,
sce
74–85,
c
1 53–55,
c
2 95–116,
d
1 55–56,
d
2 46–54,
e
1 35–36,
e
2 85–113,
f
1 81–104,
h
1 20–25
,
h
2 66–70. Distances between dorsal idiosomal setae:
vi -
vi
21–28,
ve -ve
73–82,
vi -ve
38–51,
sci -sci
122– 142,
ve -sci
44–44,
sce -sce
161–187,
sci -sce
19–22,
c
1-
c
1 51–66,
c
2-
c
2 198–267,
c
1-
c
2 106–107,
d
2-
d
2 177–208,
c
1-
d
1 63–81,
c
1-
d
2 73–87,
d
1-
d
1 52–56,
d
2-
d
1 60–75,
e
2-
e
2 144–164,
d
2-
e
2 60–78,
d
1-
e
1 49–49,
d
1-
e
2 54–71,
e
1-
e
1 37–51,
e
2-
e
1 45–59,
f
1-
f
1 87–89,
e
1-
f
1 41–50,
e
2-
f
1 44–61,
f
1-
h
1 39–45,
f
1-
h
2 43–48,
h
1-
h
1 26–35
,
h
2-
h
2 77–88,
h
1-
h
2 24–27.
Venter of idiosoma
. As in female except genital setae absent. Lengths and distances of intercoxal setae:
1a
23– 26,
3a
22–23,
4a
21–22,
1a -1a
20–22,
3a -3a
35–36,
4a -4a
19–22. Aggenital shield with three pairs of setae (
ag
1-3),
ag
3 the longest. Anal shields bearing three pairs of pseudanal setae (
ps
1-3),
ps
1 the longest. Lengths of setae:
ag
1 23– 25
,
ag
2 25–26
,
ag
3 36–38,
ps
1 26–29
,
ps
2 2–3,
ps
3 1–1.
Gnathosoma
. Chelicerae 136–136, palp 139–142. Lengths and distances of subcapitular setae:
m
26–27,
n
25– 27,
m -m
36–38,
n -n
25–26,
m -n
17–18.
Legs
. Leg setation as in female except all tarsi bearing an extra, long solenidion ω♂.
Deutonymph
(
n
= 1) (
Figs. 11
,
12
). Body 325 long, 229 wide.
Gnathosoma
90. Leg I 194, leg II 158, leg III 149, leg IV 163.
FIGURE 9.
Stigmaeus fimus
sp. nov.
(Male) A. Dorsal view of idiosoma, B. Ventral view of idiosoma.
FIGURE 10.
Stigmaeus fimus
sp. nov.
(Male) A. Leg I, B. Leg II, C. Leg III, D. Leg IV.
FIGURE 11.
Stigmaeus fimus
sp. nov.
(Deutonymph) A. Dorsal view of idiosoma, B. Ventral view of idiosoma.
Dorsum of idiosoma
. As in adult female, but patterns on shields not clear.
pob
30 in
diameter. Lengths of dorsal idiosomal setae:
vi
43
,
ve
99,
sci
30,
sce
74,
c
1 42,
c
2 87,
d
1 41,
d
2 43,
e
1 41,
e
2 87,
f
1 84,
h
1 55,
h
2 47. Distances between dorsal idiosomal setae:
vi -
vi
20,
ve -ve
73,
vi -ve
38,
sci -sci
120,
ve -sci
40,
sce -sce
153,
sci -sce
18,
c
1-
c
1 48,
c
2-
c
2 213,
c
1-
c
2 63,
d
2-
d
2 172,
c
1-
d
1 69,
c
1-
d
2 78,
d
1-
d
1 53,
d
2-
d
1 61,
e
2-
e
2 141,
d
2-
e
2 45,
d
1-
e
1 44,
d
1-
e
2 53,
e
1-
e
1 37,
e
2-
e
1 49,
f
1-
f
1 74,
e
1-
f
1 36,
e
2-
f
1 52,
f
1-
h
1 29,
f
1-
h
2 27,
h
1-
h
1 35,
h
2-
h
2 75,
h
1-
h
2 25.
Venter of idiosoma
. Similar to adult female but genital setae absent. Lengths and distances of coxisternal setae:
1a
17,
3a
17,
4a
20,
1a -1a
21,
3a -3a
23,
4a -4a
15. Three pairs of aggenital setae (
ag
1-3) situated on aggenital shields, aggenital setae nearly equal in length. Anogenital shields subterminal and bearing three pairs of pseudanal setae (
ps
1-3). Lengths of aggenital and pseudanal setae:
ag
1 17,
ag
2 18,
ag
3 18,
ps
1 23,
ps
2 12,
ps
3 14.
Gnathosoma
. Chelicerae 111, palp 100. Lengths and distances of subcapitular setae:
m
18,
n
15,
m -m
29,
n -n
19,
m -n
14.
Legs
. Counts of setae and solenidia on legs I–IV: coxae 2–2–2–2, trochanters 1–1–2–0, femora 6–4–3–2, genua 3(+1κ)–2(+1κ)–0–0, tibiae 5(+1φρ+1φ)–5(+1φρ)–5(+1φρ)–5(+1φρ), tarsi 13(+1ω)–9(+1ω)–7(+1ω)–7(+1ω).
Protonymph
(
n
= 1) (
Figs. 13
,
14
). Length of body 237, width 122.
Gnathosoma
64. Leg I 145, leg II 112, leg III 109, leg IV 108.
Dorsum of idiosoma
. As in deutonymph.
pob
18 in
diameter. Lengths of dorsal idiosomal setae:
vi
24
,
ve
60,
sci
21,
sce
30,
c
1 24,
c
2 53,
d
1 27,
d
2 26,
e
1 24,
e
2 47,
f
1 44,
h
1 29,
h
2 19. Distances between dorsal idiosomal setae:
vi -
vi
16,
ve -ve
44,
vi -ve
20,
sci -sci
77,
ve -sci
28,
sce -sce
101,
sci -sce
12,
c
1-
c
1 35,
c
2-
c
2 113,
c
1-
c
2 62,
d
2-
d
2 78,
c
1-
d
1 48,
c
1-
d
2 51,
d
1-
d
1 40,
d
2-
d
1 33,
e
2-
e
2 82,
d
2-
e
2 41,
d
1-
e
1 35,
d
1-
e
2 47,
e
1-
e
1 28,
e
2-
e
1 57,
f
1-
f
1 35,
e
1-
f
1 34,
e
2-
f
1 45,
f
1-
h
1 21,
f
1-
h
2 14,
h
1-
h
1 22,
h
2-
h
2 28,
h
1-
h
2 24.
FIGURE 12.
Stigmaeus fimus
sp. nov.
(Deutonymph) A. Leg I, B. Leg II, C. Leg III, D. Leg IV.
Venter of idiosoma
. Coxisternal shields bearing two pairs of intercoxal setae (
1a
,
3a
). Setae
4a
and genital setae absent. Aggenital shields with a pair of setae (
ag
1). Lengths and distances of these setae:
1a
10,
3a
11,
1a -1a
16,
3a -3a
15. Anogenital shields bearing three pairs of pseudanal setae (
ps
1-3).
ps
1 nearly twice length of
ps
2 and
ps
3. Lengths of setae:
ag
1 7,
ps
1 15,
ps
2 8,
ps
3 7.
Gnathosoma
. Chelicerae 87, palp 82. Subcapitulum with only a pair of subcapitular setae;
m
9,
m -m
14.
Legs
. Counts of setae and solenidia on legs I–IV: coxae 2–2–2–0, trochanters 0–0–1–0, femora 4–4–3–1, genua 3(+1κ)–2(+1κ)–0–0, tibiae 5(+1φρ+1φ)–5(+1φρ)–5(+1φρ)–5(+1φρ), tarsi 13(+1ω)–9(+1ω)–7(+1ω)–7(+1ω).
Larva
. Unknown.
Etymology.
The epithet name of this new species,
fimus
means scat, namely dung, refers to the habitat of the species.
Type
materials.
Holotype
female from cow dung, 40° 43' 52''N, 39° 03' 28''E,
1426 m
.a.s.l.,
24 November 2013
,
Harşit Valley
,
TURKEY
.
Paratypes
:
1 female
,
2 males
and 1 protonymph, same data
; 2 females, 3 males and 1 deutonymph from cow dung, 40° 39' 58''N, 38° 59' 52''E,
1994 m
.a.s.l.,
12 October 2013
;
2 females
from cow dung, 40° 55' 51''N, 38° 51' 19''E,
60 m
.
a.s.l.,
22 April 2014
,
Harşit Valley
,
TURKEY
.
Remarks.
Stigmaeus fimus
sp. nov.
closely resembles
S. silvestris
Khaustov, 2014
and
S. uzunolukensis
Özçelik & Doğan,
2011
in having two pairs of setae on the central shield, similar dorsal ornamentation and the same leg setation; however, the new species is much bigger (680 (657–677) long, 456 (420–450) wide
vs.
468 (420–470) long 325 (300–320) wide in
S. silvestris
); lower ratio
ve
/
sci
(1.9 in the new species
vs.
3.0 in
S. silvestris
); setae
elcp
and
elcl
spine-like
vs.
seta-like in
S. silvestris
(
Khaustov 2014
)
.
The new species can be distinguished from
S. uzunolukensis
by the distinctly bigger body size (length of body 680 (657–677), width 456 (420–450) in the new species
vs.
length 322 (300–350), width 171 (150–200) in
S. uzunolukensis
); setae
c
2 longer than
ve
in the new species
vs.
not longer in
S. uzunolukensis
; setae
sci
much longer than that of
S. uzunolukensis
(71 (66–76) in the new species
vs.
22 (18–25) in
S. uzunolukensis
); lower ratio
ve
/
sci
(1.9 in the new species
vs.
3.1 in
S. uzunolukensis
); dorsal idiosomal setae not widened distally in the new species
vs.
most dorsal idiosomal setae, especially
e
1,
f
1,
h
1,
h
2, distinctly widened distally in
S. uzunolukensis
(
Özçelik & Doğan 2011
)
.