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
Platymamersopsis
(s. str.)
palustris
sp. nov.
(
Figs 248–256
,
Table 12
)
Type series:
Holotype
male
,
MD 79
,
Fort Dauphin
(Tulear),
Mandena
(
QMM
area), swamp with
Sphagnum
et left border of
Rivière Amendano
(
1 km
downstream road bridge),
10 m
asl
, 21.4 °C, 290 µS/cm,
13.09.2001
, mounted;
paratypes
,
MD 82
,
Fort Dauphin
(Tulear),
Mandena
(
QMM
area), swamp with
Sphagnum
near road from nursery to coastal lake (
MD 080
),
5 m
asl
,
14.09.2001
, 0/1/0 mounted, 0/1/0 unmounted;
MD 83
,
Fort Dauphin
(Tulear),
Mandena
(
QMM
area), pond with
Nepenthes
near road from nursery to coastal lake (
MD 080
),
5 m
asl
, 25.0 °C, 23 µS/cm,
14.09.2001
, 1/0/0 mounted, 1/0/0 unmounted.
Habitat:
Swamps and pond in coastal forest at
5–10 m
asl.
Distribution:
South-east
Madagascar
(Fort Dauphin, Mandena).
Derivatio nominis:
Palustris
(Latin) — living in the swamp; as the species has only been found in swamps in the coastal forest near Fort Dauphin.
Diagnosis:
Idiosoma mid-sized, rounded; ridge on dorsal shield remote from margin, only visible as anterior and lateral bow; dorsal shield anterior very broad; coxal field short, broad, medial margins of Cx-I relatively long, of Cx-III relatively short; genital field broad rectangular, caudally surpassing genital bay; acetabula mid-sized, oval; legs relatively slender, claws on leg-I to -III with small, single dorsal clawlet and short comb-like ventral clawlets; leg-IV-6 with two short terminal setae and longer sub-terminal seta; capitulum short, compact; palp typical, relatively stout, ventral margin of P2 straight to slightly convex, dorsal margin rounded.
FIGURES 248–255.
Platymamersopsis palustris
sp. nov.
, male holotype (MD 79): 248, idiosoma, ventral view; 249, idiosoma, dorsal view; 250, leg-I; 251, leg-II; 252, leg-III; 253, leg-IV; 254, capitulum with left palp and chelicera, lateral view; 255, right palp, medial view. Scale bars = 100 µm.
FIGURE 256.
Platymamersopsis palustris
sp. nov.
, female paratype (MD 82): 256, idiosoma, ventral view. Scale bar = 100 µm.
Description, male
(n = 2): Idiosoma rounded (
Fig. 248
), purple-blue, coxae and legs more brown-greyish; dorsal shield rounded (L/W 549 (569)/471 (491)), ridge on dorsal shield far central, only developed anteriorly and laterally, open bell-shaped, Dgl-3 to -5 with stronger setae on straight line relatively far central, Dgl-6 and Lgl-4 with smaller setae far peripheral; soft integument in dorsal furrow fine lined (
Fig. 249
); ventral shield nearly circular (L/W 589 (628)/530 (569),
Table 12
); coxal field short, broad, transverse-oval, Cx-I to -III relatively small, anteriorly not surpassing ventral shield; medial margin Cx-I long (77 (74)), Cx-III short (27 (25)) (
Fig. 248
); Cxgl-2 near posterior margin of Cx-II, Cxgl-4 at anterior margin of Cx-III; Cx-IV caudally and, laterally rounded, dorso-laterally extended to Cx-II, lateral ridge straight (
Fig. 248
); genital field relatively small, broad-rectangular (L/W 115 (137)/115 (125)), anteriorly and posteriorly truncated, laterally nearly straight, caudally slightly extended beyond genital bay; acetabula rather small, oval (Ac1 and Ac3 far remote from anterior and posterior end of genital flaps respectively), setae on genital flaps very small (
Fig. 248
); setae of Vgl-1 and Vgl-3 close to caudal margin of Cx-IV; excretory pore and Vgl-2 relatively close together, close to caudal margin of ventral shield, Vgl-4 and Lgl-1 to -3 close to lateral margin; legs relatively slender, leg-I and -II with several stronger and many fine hair-like setae; leg-III with more heavy setae and very few fine setae, claws on leg-I to -III strong, curved, with single, small dorsal clawlet and relatively short, comb-like ventral clawlets (
Figs 250-252
); leg-IV with many heavy setae, terminal segment slender, with two small terminal setae and a row of four stronger sub-terminal setae (
Fig. 253
); capitulum very short, compact, dorsal apodemes slender, ventral margin proximally inflated, rostrum very short, truncated (
Fig. 254
); chelicera typical; palp very compact; P2 short, compact, with four dorsal and two latero-dorsal setae, dorsal margin curved; ventral margin straight to convex (
Figs 254, 255
), ventral seta mid-sized, pointed; P3 with two dorsal and one lateral setae, the latter far proximal; P4 with ventral and ventro-distal protrusions, ventral setae centrally and distally; P5 compact (
Figs 254, 255
).
Female
(n = 1): Idiosoma larger than in males (L/W, dorsal shield 706/569, ventral shield 741/647), darker purple; genital field more elongated (L/W 167/145) (
Fig. 256
); legs and capitulum similar to males.
Remarks:
See below below
P.spinalis
.