The water mite genusNeumania Lebert, 1879 in Australia (Acari: Hydrachnidia
Author
Smit, Harry
text
Acarologia
2021
2021-05-21
61
2
479
485
http://dx.doi.org/10.24349/acarologia/20214446
journal article
2637
10.24349/acarologia/20214446
6e5d3204-f25f-47db-b2be-d1179167692b
2107-7207
5400192
Neumania (Lemienia) australica
n. sp.
Zoobank:
9827A63C-A485-4D1B-A8BE-D69931A285FF
(
Fig. 1A – E
,
2
)
Material examined
—
Holotype
male
,
Maitland River
,
pools
,
at crossing with NW Coastal Highway
,
Western Australia
,
Australia
,
20°51.005
′
S
116°36.608
′
E
, alt.
8 m
asl
,
31 Jan. 2019
(
WAM
)
.
Paratypes
:
ten females
(
WAM
),
11 females
(
RMNH
), same data as
holotype
;
one male
,
two females
, pool in Weetootla Creek, Gammon Ranges
NP
,
South Australia
,
24 Oct. 2001
(
SAM
);
two males
, Onkaparinga River at Sundews Trail,
South Australia
,
Australia
,
35°09.478
′
S 138°34.791
′
E
, alt.
95 m
asl,
6 Apr. 2008
(
RMNH
).
Other material.
Northern Territory
. 2/7/0, pools upstream of Waterfall Creek, Kakadu
NP
,
13°25.762
′
S
132°25.089
′
E
,
25 July 1994
.
Western Australia
. 2/5/0, pool Lennard River, Windjana Gorge
NP
, Kimberley,
9 Sept. 1998
;
1/0/0, pool Lennard Gorge, Kimberley,
10 Sept. 1998
;
1/1/0, pool Manning Gorge Falls, Kimberley,
13 Sept. 1998
;
2/29/1, pool Amalia Gorge, El Questro Station, Kimberley,
16 Sept. 1998
;
7/11/0, pools in creek at Old Halls Creek, S of Halls Creek,
26 Sept. 1998
;
1/1/0, Geikie Gorge, western side, Geikie Gorge
NP
,
18°7
′
23.92
″
S
125°39
′
42.47
″
E
,
28 Sept. 1998
.
Queensland
. 12/13/0, Mt Carbine Dam, Mt Carbine,
16°32.019
′
S
145°07.525
′
E
, alt.
358 m
asl,
14 Oct. 2005
;
3/5/0, Porcupine Creek, Porcupine
NP
,
20°21.039
′
S
144°27.852
′
E
,
23 Oct. 2005
;
1/3/0, rockpool Porcupine Creek, Porcupine Gorge
NP
,
20°21.039
′
S
144°27.852
′
E
,
23 Oct. 2005
;
1/0/0, Yabba Creek at Peach Trees Campground, Jimna,
26°38.251
′
S
152°26.924
′
E
, alt.
465 m
asl,
2 Nov. 2005
.
Diagnosis
— Male: IV-leg-6 bowed, IV-leg-5 with a distinct ventral indentation, anterior to this indentation a bowed stout seta, IV-leg-6 relatively short.
Description
— Male: Idiosoma with very fine papillae, yellowish, 446 (470 – 518) long and 340 (381 – 405) wide, ventrally 454 (486 – 502) long. Apodemes of anterior coxae extending onto Cx-IV. Suture line Cx-III/IV incomplete. Area between the coxae lightly sclerotized. Gonopore ellipsoid, 61 long. Genital field with 7 – 8 pairs of acetabula, one of these distinctly larger than the others. Genital plates fused with venter without suture line. Length of P1-5:
16,
68, 40, 74, 25. P4 distally with a setal tubercle. Length of I-leg-4 – 6: 160, 172, 140. Length of IV-leg-4 – 6: 154, 178, 147. IV-leg-5 with a ventral indentation, anterior to this indentation a stout, bowed seta, ventral margin of this segment with seven pectinate setae, the five anterior setae more stout; IV-leg-6 bowed, ventral margin with 5 – 6 stout setae. True swimming setae absent, but instead legs with relatively short stiff setae.
Figure 1
Neumania australica
n. sp
.
, A – D holotype male, E paratype female. A = venter male; B = palp, C = III-leg-4 – 6; D = IV=leg=5 – 6; E = genital field female. Scale bars: A, E = 100 µm, B – D = 50 µm.
Female: Idiosoma yellowish, dorsally 697 (624 – 826) long and 526 (486 – 640) wide, ventrally 648 (616 – 697) long. Integument with very fine papillae. Coxae as in male. Medial margin of Cx-IV with a strip of secondary sclerotization. Genital field with 11 – 13 pairs of acetabula, genital plate 80 long; pre-genital sclerite 66 wide. Length of P1-5: 30, 97, 52, 96, 36. Palp as in male. Length of I-leg-4 – 6: 219, 200, 140. Length of IV-leg-4 – 6: 194, 235, 194. Legs with stiff swimming setae, IV-leg-3 with two, III-leg-5, IV-leg-4 and -5 with three and III-leg-4 with four swimming setae.
Figure 2
Neumania australica
n. sp
.
, paratype male from Onkaparinga River. Scale bar = 50 µm.
Etymology
— Named after the Australian continent.
Remarks
— The male of the new species is close to
N. gila
. The new species has IV-leg-5 distinctly bowed over its whole length (bowed anteriorly, but straight over most of its posterior part in
N. gila
), and IV-leg-6 is shorter (147 – 160 versus
225 – 258 in
N. gila
). Females are not separable.
The new species is similar also to
N. lacustris
Smit, 2002
from
New Caledonia
. The third leg of the male of
N. lacustris
is slightly modified, especially III-leg-4. The third leg of the male of the new species is hardly modified, III-leg-4 is not much broader than other segments of this leg.
Smit (1992)
reported
N. falcipes
from
Queensland
. I re-examined this material, lodged in RMNH, and concluded that the
two males
belong
N
to.
australica
n. sp
.
Therefore,
N. falcipes
must be omitted from the Australian list.