Taxonomical, ecological and zoogeographical studies on anisitsiellid water mites (Acari: Hydrachnidia: Anisitsiellidae Koenike, 1910) from Madagascar
Author
Goldschmidt, Tom
text
Zootaxa
2008
2008-12-05
1954
1
1
120
https://biotaxa.org/Zootaxa/article/view/zootaxa.1954.1.1
journal article
10.11646/zootaxa.1954.1.1
11755334
5240917
Nilotonia
(
Cookonia
)
anjozorobe
sp. nov.
(
Figs 98–111
,
Table 6
)
Type series:
Holotype
male
,
MD 11
c,
Anjozorobe
(
Antananarivo
),
Ravoandrina
,
Rivière Ampanakamonty
near campsite,
1280 m
asl
, 12.8 °C, 78 µS/cm,
21.07.2001
, mounted;
paratype
, same locality and date, 0/1/0 mounted.
Habitat:
Stream at
1280 m
asl.
Distribution:
Madagascar
(Central Highland).
Derivatio nominis:
Anjozorobe
; according to the only sample site of the species near the village of Anjozorobe.
Diagnosis:
Integument lined; dorsal plate bears Dgl-3 to -5 and post-ocular setae in both sexes (additionally Dgl-6 and Lgl-
4 in
males); coxal field and secondary sclerotization of Cx-IV and post-genital sclerite fused to extended, unified ventral shield; suture lines of individual coxae still clearly visible; Cxgl-2 between Cx-II and Cx-III; Vgl-2 and -4 free on separate platelets; Cx-I medially fused, Cx-III medially approximate to each other; genital field rectangular pear-shaped, acetabula mid-sized, elongated-oval, touching each other; sub-terminal seta on leg-IV-6 mid-sized, inserted relatively far proximal; capitulum stout, ventral margin convex; palp compact, P4 distally swollen.
FIGURES 98–105.
Nilotonia
(
Cookonia
)
anjozorobe
subgen. et sp. nov.
, male holotype (MD 11c): 98, idiosoma, ventral view; 99, idiosoma, dorsal view; 100, lateral eyes, detail. Scale bar = 25 µm. 101, leg-II-2 to -6; 102, distal claws on leg-II, detail. Scale bar = 30 µm. 103, leg-IV (sub-terminal seta at segment 6 completed (only socket visible)); 104, capitulum with left palp, lateral view; 105, right palp, medial view. Scale bars (except for 100, 102) = 100 µm.
FIGURES 106–111.
Nilotonia
(
Cookonia
)
anjozorobe
subgen. et sp. nov.
, female paratype (MD 11c): 106, idiosoma, ventral view; 107, idiosoma, dorsal view; 108, leg-II; 109, leg-IV-2 to -6; 110, capitulum with left palp and chelicera, lateral view; 111, right palp, medial view. Scale bars = 100 µm.
TABLE 6.
Measurement data for
Nilotonia
(
Cookonia
)
anjozorobe
subgen. et sp. nov.
and
Nilotonia
(
Cookonia
)
avomonina
subgen. et sp. nov.
Measurements given in µm.
|
Nilotonia (Cookonia
)
|
anjozorobe
|
avomonina
|
| male |
female |
female |
| holotype |
paratype |
holotype |
| Dorsal plate L |
693 |
735 |
775 |
| Dorsal plate W |
441 |
536 |
544 |
| Dorsal plate L/W |
1.57 |
1.37 |
1.42 |
| Ventral shield L |
683 |
662 |
706 |
| Ventral shield W |
567 |
672 |
755 |
| Ventral shield L/W |
1.20 |
0.98 |
0.94 |
| Coxal field tL |
425 |
462 |
476 |
| Cx-III W |
378 |
425 |
422 |
| Coxal field L/Cx-III W |
1.13 |
1.09 |
1.13 |
| Cx-I mL |
125 |
128 |
145 |
| Cx-III mL |
90 |
75 |
74 |
| Cx-I / Cx-III mL |
1.39 |
1.70 |
1.97 |
| Genital field L |
150 |
190 |
216 |
| Genital field W |
115 |
150 |
159 |
| Genital field L/W |
1.30 |
1.27 |
1.35 |
| Pregen sc W |
123 |
| Pregen sc L |
47 |
| Postgen sc W |
348 |
| Postgen sc L |
145 |
| Ac1 L |
62 |
| Ac1 W |
18 |
| Ac2 L |
61 |
| Ac2 W |
21 |
| Ac3 L |
69 |
| Ac3 W |
22 |
| Egg, diameter |
159 |
| Capitulum vL |
150 |
185 |
172 |
| Capitulum H |
110 |
135 |
125 |
| Chelicera L |
300 |
245 |
| Chelicera bs L |
210 |
191 |
| Chelicera claw L |
90 |
60 |
| Chel bs / claw L |
2.33 |
3.18 |
| Chelicera H |
60 |
53 |
| Chelicera L/H |
5.00 |
4.65 |
| P1 dorsal L |
20 |
25 |
26 |
| P2 dL |
70 |
90 |
94 |
| P3 dL |
40 |
48 |
59 |
| P4 dL |
75 |
93 |
114 |
......continue
TABLE 6.
(continued)
|
Nilotonia (Cookonia
)
|
anjozorobe
|
avomonina
|
| male |
female |
female |
| holotype |
paratype |
holotype |
| P5 dL |
15 |
15 |
29 |
| Palp tL |
220 |
270 |
322 |
| P1 rel L |
0.09 |
0.09 |
0.08 |
| P2 rel L |
0.32 |
0.33 |
0.29 |
| P3 rel L |
0.18 |
0.18 |
0.18 |
| P4 rel L |
0.34 |
0.34 |
0.35 |
| P5 rel L |
0.07 |
0.06 |
0.09 |
| P1 H |
35 |
43 |
37 |
| P2 H |
45 |
53 |
49 |
| P3 H |
38 |
45 |
39 |
| P4 H |
33 |
35 |
32 |
| P5 H |
15 |
18 |
17 |
| P1 L/H |
0.57 |
0.59 |
0.70 |
| P2 L/H |
1.56 |
1.71 |
1.93 |
| P3 L/H |
1.07 |
1.06 |
1.50 |
| P4 L/H |
2.31 |
2.64 |
3.58 |
| P5 L/H |
1.00 |
0.86 |
1.71 |
| II-leg-1 L |
70 |
83 |
| H |
48 |
59 |
| II-leg-2 L |
75 |
90 |
93 |
| H |
50 |
55 |
54 |
| II-leg-3 L |
88 |
100 |
108 |
| H |
50 |
55 |
54 |
| II-leg-4 L |
115 |
140 |
140 |
| H |
53 |
55 |
54 |
| II-leg-5 L |
145 |
155 |
174 |
| H |
50 |
50 |
47 |
| II-leg-6 L |
155 |
160 |
184 |
| H |
50 |
50 |
49 |
| III-leg-1 L |
86 |
| H |
49 |
| III-leg-2 L |
100 |
| H |
51 |
| III-leg-3 L |
113 |
| H |
51 |
| III-leg-4 L |
203 |
| H |
54 |
| III-leg-5 L |
225 |
| H |
47 |
......continue
TABLE 6.
(continued)
|
Nilotonia (Cookonia
)
|
anjozorobe
|
avomonina
|
| male |
female |
female |
| holotype |
paratype |
holotype |
| III-leg-6 L |
203 |
| H |
49 |
| IV-leg-1 L |
120 |
142 |
| H |
65 |
67 |
| IV-leg-2 L |
90 |
105 |
110 |
| H |
55 |
60 |
54 |
| IV-leg-3 L |
100 |
120 |
123 |
| H |
55 |
60 |
51 |
| IV-leg-4 L |
143 |
178 |
184 |
| H |
50 |
55 |
50 |
| IV-leg-5 L |
168 |
190 |
221 |
| H |
35 |
40 |
39 |
| IV-leg-6 L |
150 |
190 |
216 |
| H |
25 |
28 |
25 |
| Sub-terminal seta 1 L |
25 |
Description, male
(n = 1): Idiosoma rounded-oval (
Fig. 98
); dorsum mainly covered by large plate (L/W 693/441), including Dgl-3 to -6, Lgl-4 and post-ocular setae, colour greyish dark-purple; lateral eyes separated on each side, free under soft integument, anterior eyes irregularly shaped, posterior eyes oval; soft integument around dorsal plate lined, bearing Dgl-2, Lgl-1 to -3 on small platelets, one pair of very small platelets above anterior eyes (
Fig. 100
), and l1-5 (
Fig. 99, 100
); coxal field and secondary sclerotization form unified ventral shield (L/W 683/567); Cx-I medially fused (rostral 1/3 of medial margin free), postero-lateral margin of Cx-II overlap Cx-III; Cx-III medially approximate each other; coxal field medially fused by fine secondary sclerotization; suture line between Cx-III and Cx-IV straight; medial and latero-caudal margin of Cx-IV straight to slightly convex, caudal corner rectangular with hook-like notch, insertion of leg-IV anterior to genital field (
Fig. 98
); Cx-IV laterally fused with secondary sclerotization without visible margin (
Fig. 98
); genital bay rostral very narrow; genital flaps rectangular-rounded, caudally broadened (
Fig. 98
); acetabula mid-sized, oval, touching each other, Ac1 slightly distant from anterior, Ac3 from posterior margin of genital flaps; pre- and post-genital sclerites completely fused with secondary sclerotization; setae of Vgl-1 lateral of caudal margin of genital field, Vgl-3 approximate to latero-caudal margin of Cx-IV; Vgl-2 and Vgl-4 on platelets posterior to distinct caudal margin of ventral shield (platelets of Vgl-2 laterally extended); excretory pore without sclerotization (
Fig. 98
); leg segments relatively short; claws on leg-I to -III with well developed ventral and smaller dorsal clawlet (
Figs 101, 102
), leg-IV-6 without claws, short, distally tapering, rounded, subterminal seta mid-sized (only socket visible in mounted specimen) (
Fig. 103
); capitulum very short, stout, ventral margin convex (
Fig. 104
), palps relatively compact, ventral seta at P2 more laterally, five dorsal setae, ventral margin irregular, P3 with two latero-dorsal and two medio-dorsal setae, P4 compact club-shaped distally, P5 short with large terminal claws (
Figs 104, 105
).
Female
(n = 1): Less sclerotized than male (
Fig. 106
); dorsal plate larger (L/W 735/536), bearing Dgl-3 to -5 and post-ocular setae; Lgl-4 on separate platelets lateral to dorsal plate, Dgl-6 on irregular platelets posterior dorsal plate, two pairs of small platelets anterior to Lgl-4 and posterior to Dgl-6 (
Fig. 107
); coxal field compacter, Cx-I medially completely fused, capitular bay shallower, caudal margin of Cx-IV oriented more laterally, insertions of legs-IV lateral to genital field, ventral shield broad, less extended (L/W 662/672), caudally only reaches half way between genital field and excretory pore, Vgl-2 and -4 (
Fig. 106
); leg-II as in male (
Fig. 108
); distal segments of leg-IV slenderer (
Fig. 109
); gnathosoma as in male, chelicera compact, proximally high, claw very broad (
Figs 110, 111
).