Feltria (Azugofeltria) motasi Schwoerbel 1961
Creators: name: Martin, Peter
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Trombidiformes
Feltriidae
Feltria
Feltria motasi

description: Feltria (Azugofeltria) motasi (Schwoerbel, 1961)
Material examined. Larvae attached to various chironomid hosts collected from Lurenzgriecht emergence collections in 2002, measurements refer to 5 larvae. Attribution by differing characters to the fragmentary described larva of F. rou x i (see below), the only other Feltria species present in the benthos of the stream (Tab. 1).
Description. Character states as in generic diagnosis. Habitus of the idiosoma longish (Fig. 8 A); anterior idiosoma slightly narrowed, posterior idiosoma rounded. L idiosoma 182–203 (187), W 122–174 (143). Dorsal idiosoma (Fig. 8 A): Dp relatively large and striated, shape anteriorly slightly tapered, posteriorly rounded, L Dp 159–169 (163), W 96–109 (105), L eye capsule 14–17 (16), Mp2-Amdp 31–33 (32), Mp1-Mp1 37–40 (38), Mp2- Mp2 41–44 (43), Lp1-Lp 1 27–30 (28), Lp2-Lp2 67–68 (68), Mp1-Lp1 8–9 (8), Mp2-Lp 2 14–15 (15), Mp1-Mp 2 21–24 (23), Lp1-Lp 2 29–31 (30), Mp 1 14–16 (15), Mp 2 15–20 (18), Lp1 38–44 (41), Lp2 37–43 (41), Hu 34–42 (39), Mh1 32–37 (35), Mh2 35–42 (39), Mh 3 28–32 (29), Mh 4 20–25 (23), Lh 1 28–40 (35), Lh 2 25–28 (26), Lh 3 22–25 (23). Ventral idiosoma (Fig. 8 B): almost completely covered by alveolar coxal plates, setae V1 located laterally of Expp, setae V2 and V3 located more laterally, V4 more posteriomedially. CXI separated from CXII+III only laterally, common median L of both parallel CXI–CXIII 1 07–119 (114), max. W CXI– III 52 –58 (55), C1–C2 39–44 (42), C1-Mmcp 20–22 (21), C1–C4 47–52 (50), C 1 18–35 (23), C 2 25–35 (29), C 3 18–20 (19), C 4 27–29 (28); Expp subquadrangular, bearing two pairs of setae, Exp located slightly anteriorly, Expp L 8–11 (9), W 11–13 (12), E1– E1 6 –7 (6), E2– E2 8 –9 (8), E 1 7 –10 (8), E 2 5 –12 (9), V 1 8–13 (10), V 2 15–20 (18), V 3 22–28 (24), V4 35 –38 (36). Gnathosoma (dorsal view): L of base 58–60 (59), W 29–33 (31), chelicera L 42–48 (45), chela L 12– 13 (12), claw L 15–17 (16), L seta P3 36–40 (39).
Legs: All legs distinctly striated. Leg I (Fig. 9 A): total L 156–168 (162), L IL-1 (1se) 20–22 (22), IL-2 (7se) 28–31 (29), IL-3 (4se, 1so) 28–30 (29), IL-4 (7se, 2so) 35–37 (36), IL-5 (10se, 1so, 1eu) 45–48 (46), H IL- 1 16–17 (17), IL- 2 15–17 (16), IL- 3 15–16 (15), IL- 4 15–16 (16), IL- 5 15–16 (16). Leg II (Fig. 9 B): total L 166–173 (169), L IIL-1 (1se) 25–26 (26), IIL-2 (7se) 26–30 (28), IIL-3 (4se, 1so) 30–30 (30), IIL-4 (8se, 2so) 36–37 (36), IIL-5 (11se, 1so, 1eu) 49–50 (50), H IIL- 1 16–16 (16), IIL- 2 15–16 (16), IIL- 3 15–16 (15), IIL- 4 15–16 (15), IIL- 5 13– 14 (14). Leg III (Fig. 9 C): total L 199–207 (202), L IIIL-1 (1se) 38–40 (39), IIIL-2 (6se) 34–36 (35), IIIL-3 (5se) 34–35 (35), IIIL-4 (7se, 1so) 41–43 (42), IIIL-5 (11se) 52–53 (52), height IIIL- 1 13–13 (13), IIIL-2 1 3–14 (14), IIIL- 3 13–14 (13), IIIL- 4 14–14 (14), IIIL- 5 13–14 (13). Leg claws consist of one short empodium and two longer ambulacra (Fig. 9 B), all with one large median tooth and two small lateral teeth.
Remarks. Up to now there has been no detailed description of larval Feltriidae. Even Smith (1976) who gave a preliminary family diagnosis has not described any species. A preliminary diagnosis for the genus Feltria was given by Martin (2006). In addition to F. rouxi (see below), some more or less not clearly attributable larvae have also been described (Walter 1922a: F. cf. setigera Koenike, 1896, Walter 1922b: F. cf. minuta Koenike, 1892, Schechtel 1910: F. cf. setigera, Gerecke & Martin 2006: F. cf. setigera, Martin 2006: Feltria sp.). Only if there are more thorough descriptions will the variability of characters and clearer species differentiations be possible in that genus which includes about 30 species in Europe (Gerecke 2012).
description: Published as part of Martin, Peter, 2016, Larval morphology of benthic and interstitial water mites (Acari: Hydrachnidia) from a Luxembourgian stream, pp. 451-480 in Zootaxa 4139 (4) on pages 466-468, DOI: 10.11646/zootaxa.4139.4.1, http://zenodo.org/record/265489