Five new species of the feather mite genus Trouessartia Canestrini from South America (Acari: Trouessartiidae)
Author
Hernandes, Fabio Akashi
text
Zootaxa
2014
3856
1
journal volume
42630
10.11646/zootaxa.3856.1.2
cf9c4ba4-685b-4800-9c74-dd2bbf3520a9
1175-5326
230902
F2E274C7-A445-42F0-A8C0-34EB2157370F
Trouessartia picumni
sp. nov.
(
Figs. 13–15
)
Type-host
:
Picumnus fulvescens
(Stager, 1961)
(
Piciformes
,
Picidae
), Tawny Piculet.
Type-locality:
Mata
da Escola Agrícola de Jundiaí-UFRN, Macaíba, Rio Grande do Norte,
Brazil
.
Material examined.
Male
holotype
,
14 males
and
31 females
ex
Picumnus fulvescens
(bird code #99),
1 male
(#673),
2 males
and
2 females
(#47),
2 males
and
2 females
(#117),
1 female
(#673),
BRAZIL
: Rio Grande do Norte, Macaíba,
5°53'S
,
35°23'W
, coll. H.M. Silva;
1 male
and
1 female
ex
Picumnus temmincki
Lafresnaye, 1845 (Picidae)
(#Y-79, 788, 90-125),
BRAZIL
: São Paulo State, Jacupiranga,
24°41'34''S
,
48°00'07''W
, 0
8 February 1979
, coll. Y. Oniki & E.O. Willis.
Type
specimen deposition:
holotype
and most
paratypes
at DZUnesp-RC;
2 male
and
2 female
paratypes
at each
DZSJRP
,
OSAL
,
UMMZ
,
ZISP
.
Etymology.
The specific epithet is taken from the generic name of the host, and is a noun in the genitive case.
Description.
Male (
holotype
, range for 5
paratypes
in parentheses). Length of idiosoma from anterior end to bases of setae
h3
436 (430–454), greatest width of idiosoma at level of humeral shields 180 (175–185). Length of hysterosoma from sejugal furrow to bases of setae
h3
294 (261–299). Prodorsal shield: length along midline 141 (142–159), greatest width of posterior part 148 (145–155), anterior end narrow and with conspicuous hump-like extension, part at level of trochanters II not narrowed, antero-lateral extensions almost extending to bases of epimerites Ia between legs I and II, lateral margins fused with anterior end of scapular shields, posterior margin uneven, slightly convex in median part, surface smooth without ornamentations (
Fig. 13
A). Vertical setae
ve
represented only by alveoli. Internal scapular setae
si
thin needle-like, 15 (16–26) long, separated by 49 (49–53); external scapular setae
se
149 (135–147) long, separated by 95 (95–100). Humeral shield with setae
c2
needle-like, 27 (27–31) long. Setae
c3
narrowly lanceolate, acute apically, 23 (23–25) long. Dorsal hysterosoma with broadly connected prohysteronotal shield and lobar shield. Prohysteronotal shield: length 188 (180–195), width at anterior margin 146 (140–149), lateral margins with narrow incision at level of trochanters III, dorsal hysterosomal apertures (DHA) absent, lateral and posterior margins conspicuously darker than remaining area, central area without ornamentation. Dorsal setae
c1
,
d1
,
d2
absent. Length of lobar shield excluding lamellae 98 (94–102). Apical parts of opisthosomal lobes approximate, separated by narrow parallel-sided terminal cleft, length of cleft from anterior end to apices of lamellae 66 (62–71), width in anterior part 19 (18–21). Lamellae semi-ovate, slightly attenuate apically, margins smooth, length from bases of setae
h3
to lamellar apices 34 (29–35). Seta
h2
225 (220–247) long, seta
h3
147 (137–155) long. Distance between dorsal setae:
h2
:
h3
31 (32–36),
h2
:
h2
65 (58–61),
h3
:
h3
50 (48–54).
Epimerites I free. Rudimentary sclerites rEpIIa small, irregularly shaped. Genital apparatus situated between levels of trochanters III, IV, length excluding basal sclerite 34 (35–38), greatest width 22 (20–23) (
Fig. 13
B). Epiandrum present. Setae
g
short, filiform, their alveoli separated. Postgenital plaque present. Adanal apodemes heavily sclerotized, without rounded apophyses. Translobar apodeme present. Adanal shields small, triangular, bearing setae
ps3
. Anal suckers 14 (13–16) in diameter, distance between centers of discs 25 (21–25). Epimerites IVa thin, triangular, anterior ends reaching level of setae
4a
. Setae
4b
situated slightly anterior to level of setae
3a
, setae
g
slightly posterior to
4a
. Distance between ventral setae
4b
:
3a
30 (33–37),
4b
:
g
89 (83–91),
g
:
ps3
44 (43–47),
ps3
:
ps2
59 (54–59).
Legs IV extending by ambulacral disc to level of setae
h3
. Setae
sR
of trochanters III setiform, thickened basally, 26 (24–28) long. Modified setae
d
of tarsus IV barrel-shaped, with discoid cap, situated at distal third of segment; modified setae
e
hemispheroid, without cap, situated apically (
Fig. 15
D). Length of solenidia:
σ1
of genu
I 26
(24–27),
σ
of genu
II 10
(7–11),
σ
of genu
III 15
(12–14),
ϕ
of tibia
I 63
(60–63),
ϕ
of tibia
II 65
(63–67),
ϕ
of tibia
III 60
(57–59),
ϕ
of tibia
IV 36
(31–39),
ω1
of tarsus
I 18
(16–20),
ω3
of tarsus
I 30
(28–33),
ω1
of tarsus
II 20
(18–21).
Female (range for 5
paratypes
). Length of idiosoma from anterior end to apices of lamellar lobar processes 498–555, greatest width 184–198. Length of hysterosoma from sejugal furrow to apices of lamellar lobar processes 340–378. Prodorsal shield: shaped as in male,
147–168 in
length,
150–160 in
width, surface without ornamentation (
Fig. 14
A). Vertical setae
ve
represented only by alveoli. Setae
si
thin needle-like, 16–24 long, separated by 53–59; setae
se
125–155 long, separated by 95–108. Humeral shields with setae
c2
needle-like, 32–34 long. Setae
c3
narrowly lanceolate, acute apically,
23–28 in
length. Hysteronotal shield: length from anterior margin to bases of setae
h3
290–310, width at largest part near anterior margin 137–156, lateral margins with narrow incision at level of trochanters III, DHA absent, anterior part narrowly fused to scapular shields, surface without ornamentation, lateral and posterior parts conspicuously darker (
Figs 14
A). Dorsal setae
c1
,
d1
,
d2
,
e1
absent in most specimens (
d1
present as microsetae in both male and female from
Picumnus temmincki
). Setae
h1
short filiform, 5–9 long, situated anterior to bases of setae
h2
, 5–8 from each lateral margin of hysteronotal shield. Width of opisthosoma at level of setae
h2
85–93. Setae
ps1
positioned dorsally on opisthosomal lobes, closer to inner margins of lobes, and slightly closer to bases of
h2
than to
h3
. Distance from bases of setae
h3
to membranous apices of lobes 38–46. Setae
f2
absent. Supranal concavity open posteriorly into terminal cleft. Length of terminal cleft together with supranal concavity 126–148, width of cleft at level of setae
h
3
16–25. Interlobar membrane narrow. External copulatory tube absent. Spermatheca as in
Fig.
15
I. Distance between dorsal setae:
h2
:
h3
59–67,
h2
:
h2
71–77,
h3
:
h3
42–58,
h1
:
h
2
8–13,
h1
:
h1
66–70,
ps1
:
h3
35:41.
FIGURE 13.
Trouessartia picumni
sp. nov.
, male. A—dorsal view; B—ventral view.
FIGURE 14.
Trouessartia picumni
sp. nov.
, female. A—dorsal view; B—ventral view.
FIGURE 15.
Trouessartia picumni
sp. nov.
: tarsi I-IV of male (A–D) and female (E–H); I—spermatheca of female.
Epimerites I free. Epigynum
41–51 in
length,
82–98 in
width (
Fig. 14
B). Epimerites IVa present, very thin. Setae
sR
of trochanters III setiform, thickened basally, 24–26 long. Legs IV extending by ambulacral disc to midlevel between setae
h2
and
h3
. Length of solenidia:
σ1
of genu
I 22–28
,
σ
of genu
II 11–14
,
σ
of genu
III 11–14
,
ϕ
of tibia
I 61
–68,
ϕ
of tibia
II 65
–70,
ϕ
of tibia
III 56
–62,
ϕ
of tibia
IV 11–14
,
ω1
of tarsus
I 16–20
,
ω3
of tarsus
I 28–35
,
ω1
of tarsus
II 18–21.
Differential diagnosis.
Trouessartia picumni
sp. nov.
resembles
T. megadisca
Gaud, 1962
by having, in males, translobar apodemes present, terminal lamellae entire, dorsal hysterosomal apertures (DHA) absent, setae
d2
absent, and lateral margins of hysteronotal shield with incisions at level of trochanters III. The new species is clearly distinguishable from the latter, and also from all species of the genus by lacking dorsal setae
d1
,
d2
, and
e
2
in both sexes. It is also unique in having the anterior end of the prodorsal shield strongly narrowed.