A new species of Hexabdella (Acari: Bdellidae) from Brazil
Author
Hernandes, Fábio A.
PPG Biologia Animal, UNESP - São José do Rio Preto, São Paulo, Brazil; E-mail: fabio _ akashi @ yahoo. com. br, rodrigodaud @ yahoo. com. br UNESP - São Paulo State University - Instituto de Bioci ncias, Letras e Ci ncias Exatas; Rua Crist v o Colombo, 2265, Jardim Nazareth, São José do Rio Preto, São Paulo, Brazil. 15054 - 000; Depto. Zoologia e Botanica. E-mail: reinaldo @ ibilce. unesp. br
Author
Daud, Rodrigo D.
PPG Biologia Animal, UNESP - São José do Rio Preto, São Paulo, Brazil; E-mail: fabio _ akashi @ yahoo. com. br, rodrigodaud @ yahoo. com. br UNESP - São Paulo State University - Instituto de Bioci ncias, Letras e Ci ncias Exatas; Rua Crist v o Colombo, 2265, Jardim Nazareth, São José do Rio Preto, São Paulo, Brazil. 15054 - 000; Depto. Zoologia e Botanica. E-mail: reinaldo @ ibilce. unesp. br
Author
Feres, Reinaldo J. F.
text
Zootaxa
2007
2007-06-07
1501
1
57
63
https://biotaxa.org/Zootaxa/article/view/zootaxa.1501.1.4
journal article
10.11646/zootaxa.1501.1.4
11755334
5086939
61BF9A7F-9A54-45FA-8623-C4AB5BD0E8A6
Hexabdella cinquaginta
sp.n.
Figs 1–13
Body red in life.
Female
.
Dimensions
: Body length 759 (649–770), width 352 (297–396), leg lengths: I 275 (275–308), II 231 (242–275), III 319 (275–341), IV 352 (319–374),
VES
81.6 (70.3–84.3),
DES
106.1 (100.6–108.8), palp segments I–V: 12 (8.2–19), 63 (59.8–76.2), 33 (19–33), 16 (16–19), 49 (43–54.4),
vi
76 (76–84),
ve
27 (27–38),
sci
109 (90–111),
sce
30 (27–33),
c1
33 (33–38),
c2
46 (43–54.4),
d1
33 (30–33),
e1
35 (33–38),
f1
30 (24– 30),
f2
30 (34–37),
h1
38 (35–41),
h2
46 (38–46).
Gnathosoma
(
Figs. 1–3
): six pairs of ventral hypostomal setae longitudinally aligned (
vh1 – vh6
,
Fig. 1
). Chelicera with longitudinal striae; two setae present, distal seta about twice length of proximal seta; movable chela with two teeth and longer than fixed chela (
Fig. 3
).
Palp chaetotaxy
(
Fig. 2
): trochantera 0, basifemur
6t
, telofemur
1t
, genu
4t
, tibiotarsus 1s,
3t
, 2 long end setae (VES, DES).
Dorsum
: lateral areas of hysterosoma irregularly striated, with rounded lobes on striae, wider than long and spaced (
Fig.13
), visible as interrupted striae under small magnification (400x) (
Figs. 4
;
12–13
): propodosomal striae longitudinal along midline (
Fig. 6
); two pairs of eyes posterolateral to
ve
with longitudinal striae between each pair. Setae
ve
closer to
vi
than to
sci
. Opisthosomal setae and
sce
setae distally branched, transverse striae between dorsocentral setae; lobed and sparsely broken striae on lateral margins of hysterosoma (
Figs. 4
,
12; 13
).
Venter
(
Fig. 5
;
11
): eversible ovipositor present; genital valves each with 6–7 setae; seven pairs of agenital setae; setae
ps1 – ps3
smooth; one pair of ventral setae between coxae IV.
Legs
(
Figs. 7–10
): Leg chaetotaxy:
coxae
I–IV 5t-4t-
4t
, 1 prop-
2t
;
trochantera
I–IV 1t-1t-2t-
1t
;
basifemora
I–IV
6t
, 2 reduced-7t-
6t
, 1 reduced-
5t
;
telofemora
I–IV
4t
, 1 macr.plum.-
4t
, 1 macr.plum.-
4t
, 1 macr.plum.-
3t
, 1 macr.plum.;
genua
I–IV 1s, 4t-1s, 4t-1s, 4t-1s,
4t
;
tibiae
I–IV
6t
, 3s, 1tr-
5t
, 2s-
5t
, 1s-
6t
, 1tr;
tarsi
I–IV
20t
, 4s, 1micr., 2 trichobothrium-like—
14t
, 2s, 1micr., 2 trichobothrium-like—
13t
, 1tr, 2 trichobothrium-like—
13t
, 1micr, 1 trichobothrium-like.
Male
. Unknown.
Differential diagnosis:
The new species resembles
H. singula
Van der Schyff, Theron & Ueckermann, 2004
by the opisthosomal setae being distally branched. It can be distinguished from the latter by its lobed striae on lateral region of opisthosoma, by the distally branched macroseta on telofemur I–II (smooth in
H. singula
), microseta present proximally on tarsi IV and by having 6 setae on palpal basifemur (rather than
5 in
H. singula
). Chaetotaxy of trochanter II also differs from that of
H. singula
.
FIGURE 11.
H. cinquaginta
sp.n.
: genital valves and paragenital setae.
Remarks:
The specimens from rubber trees were found at the basis of leaflets, inside a silken cocoon similar to that of
Tetrabdella neotropica
, whereas all specimens collected from
Tibouchina
sp. (Melastomataceae)
were found wandering on twigs.
Etymology:
From Latin
cinquaginta
, meaning fifty, in tribute to the 50
th
anniversary of the Instituto de Biociências, Letras e Ciências Exatas (IBILCE/UNESP).
Type material
:
Holotype
female (n. 6802),
Hevea brasiliensis
Muell. Arg. (Euphorbiaceae)
07-III-2005
, Itiquira (
17°23’S
,
54°45’W
),
Mato Grosso
,
Brazil
;
two paratype females
with the same data as
holotype
. Four
paratype
females,
Tibouchina
sp. (Melastomataceae)
,
XII-2006
, Serra do Japi (
23
o
11’S
,
46
o
52’W
)—Atlantic Forest remnants,
São Paulo
,
Brazil
, deposited in DZSJRP.