Platymamersopsis davecooki Goldschmidt 2008, sp. nov.
Creators: name: Goldschmidt, Tom
Publisher: name: Zenodo
Year: 2008
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Actinedida
Anisitsiellidae
Platymamersopsis
Platymamersopsis davecooki

description: Platymamersopsis (s. str.) davecooki sp. nov.   
(Figs 239–247, Table 12)  
 Type: Holotype male, MD 162 a, Joffreville (Montagne d’Ambre, Antsiranana), Rivière de Manques in Reserve Fontenay, riffle, 730 m asl, 21.5 °C, 15 µS/cm, 20.11.2001, mounted.   
 Additional specimens examined: MD 118a, Maromandia (Majunga), left tributary of Rivière Andranamalaza, riffle, about 1.0 km E from main road, 100 m asl, 25.5 °C, 36 µS/cm, 21.10.2001, 0/1/0 mounted.   
 Habitat: Streams at 100–730 m asl.   
 Distribution: Madagascar (Montagne d’Ambre and northern lowland).   
 Derivatio nominis: Davecooki — named after Dr Dave Cook (Paradise Valley, USA), who made the present study possible and described several species of the genus from West Africa.   
 Diagnosis: Idiosoma small, oval; dorsal shield anteriorly rounded, broad, ridge on dorsal shield apically pointed, caudally undulated; coxal field relatively broad, medial margins of Cx-I long, of Cx-III mid-sized; genital field small, rounded-rectangular, caudally only slightly surpassing genital bay; acetabula mid-sized, oval; legs relatively compact, claws on leg-I to -III strong, with single dorsal clawlet and comb-like ventral clawlets; leg-IV-6 with two mid-sized terminal setae and three strong sub-terminal setae; capitulum very compact; palp relatively stout, ventral margin of P2 straight, dorsal margin rounded.   
 Description, male (n = 1): Idiosoma oval (Fig. 239), pale grey; dorsal shield oval, anteriorly and posteriorly rounded (Fig. 240) (L/W 407/304), ridge on dorsal shield apically tapering, caudally weaker, undulated, Dgl-3 to -5 with strong setae, Dgl-6 and Lgl-4 with small setae; soft integument in dorsal furrow lined (Fig. 240); ventral shield broad-oval (L/W 451/331); coxal field (especially Cx-I to -III) relatively broad, anteriorly surpassing ventral shield; medial margin Cx-I long (56), Cx-III mid-sized (34) (Fig. 239); Cxgl-2 close to posterior margin of Cx-II, Cxgl-4 at anterior margin of Cx-III; caudal margin of Cx-IV rounded, caudo-laterally undulated, laterally slightly convex, dorso-lateral only weakly extended, lateral ridge +/-straight (Fig. 239); genital field small, rounded-rectangular (L/W 83/78), anteriorly rounded, laterally nearly straight, smoothly convex, posteriorly truncated, caudally slightly extended beyond genital bay; acetabula mid-sized, oval (Ac1 and Ac3 slightly remote from anterior and caudal end of genital flaps respectively), few, small setae on genital flaps (Fig. 239); setae of Vgl-1 postero-medial to caudal corner of Cx-IV, Vgl-3 close to caudo-lateral margin of Cx-IV; excretory pore and Vgl-2 close together, remote from caudal margin of ventral shield, Vgl-4 closer to caudal margin, Lgl-1 to -3 at lateral margin; legs compact, leg-I to -III with few strong, pinnate setae and many fine hair-like setae, claws heavy with single dorsal clawlet and comb-like ventral clawlets (Fig. 241); leg-IV with many heavy setae, leg-IV-6 with two mid-sized terminal setae (Fig. 242); capitulum short, compact, dorsal apodemes slender, ventral margin proximally bellied, towards rostrum straight (Fig. 243); chelicera typical, with high dorsal hump (Fig. 244); palp compact, strong; P2 short, compact, with four laterodorsal and two medio-dorsal setae, dorsal margin curved, undulated; ventral margin straight (Fig. 243), ventral seta long, pointed; P3 with two medio-dorsal and one lateral setae; P4 with ventro-distal protrusions, ventral setae located distally; P5 compact with strong distal claw (Fig. 243).   
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 Female (n = 1): Idiosoma similar to male, coxal field as well as genital field slenderer (L/W 87/69) (Fig. 245, Table 12); legs and gnathosoma similar to male (Figs 246, 247).   
 Remarks: See below under P. spinalis.
description: Published as part of Goldschmidt, Tom, 2008, Taxonomical, ecological and zoogeographical studies on anisitsiellid water mites (Acari: Hydrachnidia: Anisitsiellidae Koenike, 1910) from Madagascar, pp. 1-120 in Zootaxa 1954 (1) on pages 98-103, DOI: 10.11646/zootaxa.1954.1.1, http://zenodo.org/record/5240917