A new water mite species from a karstic cavern in southwestern Anatolia: Acherontacarus burduricus n. sp. (Acari, Hydrachnidia) Author Gülle, Pinar Author Boyaci, Yunus Ömer Author Gülle, İskender text Zootaxa 2018 2018-03-16 4394 4 590 593 journal article 30503 10.11646/zootaxa.4394.4.10 808938d1-ef43-4d70-8c4d-971fb161d51f 1175-5326 1199896 15313F90-2F46-4BB3-A0E2-0BAEDEBCC395 Acherontacarus burduricus n. sp. Studied material. Holotype : Adult male, a small karstic cavern in Aksu River valley in Burdur province near Antalya , Turkey , 0 8.07.2014, 37° 23.173 ′ N , 30° 50.152 ′ E , 380 m a.s.l. , leg. İ. Gülle. Paratypes : one male, three females, same data as holotype. The type material is deposited in Eğirdir Fisheries Faculty, Süleyman Demirel University , Isparta , Turkey . Diagnosis. Palp stout, P-2 longer than P- 4 ( Fig. 2e ). IV-L-5 and IV-L-6 are approximately equal in size. Male IV-L- 5 slightly enlarged to form a groove in basal half and bearing a stout seta in distal part ( Fig. 2b ). IV-L-4 enlarged, with three pairs of long hairs on the ventral prominence ( Fig. 2b ). Description. Both sexes. Ten pairs of small platelets, surrounding the central plate, four pairs with setae. Dorsal shield with tubercles at lateral and posterior. Anterior plate with straight posterior margin. Cx-I and Cx-II are fused and morphologically similar. Male. Idiosoma L/W 900/578. Dorsum with a large posterior plate, L/W 635/440, surrounded by 10 pairs of small platelets, four pairs with setae, anterior plate L/W 175/350; with straight posterior margin; three pairs of setae located on the anterior plate and four pairs of setae on the posterior plate ( Fig. 1c ). Venter: Gonopore between one pair of genital plates flanked by posterolateral platelets and located posterior to the anteromedial and anterolateral platelets and III-Leg coxal plates, genital field L/W 85/105; excretory pore plate L/W 185/340; posterolateral platelets anteriorly concave embracing genital plates, reaching posterior margin of excretory pore plate ( Fig. 1d ). Palp: Palp stout, P-2 is longer than the other parts of palp, capitulum L 237. Palp ( Fig. 2d, e ), L and setation (in parentheses): P-1, 31; P-2, 170 (four setae); P-3, 95 (two setae); P-4, 110 (three normal setae and one stout ventral seta), P-5, 33. FIGURE 1. Acherontacarus burduricus n. sp. a–b, female a) dorsum b) venter, c–d, male c) dorsum d) venter FIGURE 2. Acherontacarus burduricus n. sp. male a) III-L b) IV-L c) chelicera d) gnathosoma and palps e) palp Leg: Dorsal length and setation (in parentheses) of leg segments: I-L-2, 162; I-L-3, 92; I-L-4, 135; I-L-5, 133,;I-L-6, 132; II-L-2, 190; II-L-3, 98; II-L-4, 154; II-L-5, 148; II-L-6, 144; III-L-2, 320; III-L-3, 125; III-L-4, 165; III-L-5, 150; III-L-6, 245; IV-L-1, 70; IV-L-2, 340; IV-L-3, 140; IV-L-4, 240 (three long setae in ventral side); IV-L-5, 180 (1 stout, 8 setae); IV- L-6, 245 (13 dorsal setae, 8 stout lateral setae, plus 11 distal setae ( Fig. 2a,b ). Female. Idiosoma L/W 945/600. Dorsum: anterior plate L/W 160/340; posterior plate L/W 680/425 ( Fig. 1a ). Venter: gonopore between paired genital plates flanked by posterolateral platelets and located posterior to the anteromedial and anterolateral platelets and III-Leg coxal plates, genital field L/W 185/85; posterior part of excretory pore plate narrower than in male, L/W 200/300; posterolateral platelets curved anteriorly around genital plates, not reaching posterior margin of excretory pore plate ( Fig. 1b ). Capitulum L 300. Palp, L and setation (in parentheses): P-1, 36; P-2, 192 (three setae); P-3, 98; P-4, 109; P-5, 36. Legs without swimming setae; dL: I-L-2, 170; I-L-3, 88; I-L-4, 166; I-L-5, 130; I-L-6, 131; IV-L-2, 345; IV-L-3, 145; IV- L-4, 250; IV-L-5, 177; IV-L-6, 224. Etymology. The species is named after the area of the collecting site, Burdur province , Turkey . Remarks. Acherontacarus burduricus n. sp . is the third Acherontacarus species recorded from Turkey , following A. anatolicus and A. rutilans ( Boyacı et al. 2010 ; Aykut et al. 2016 ). Together with the species A. dividuus , A. vietsi , A. bicornis , A. tuberculatus , A. nicoleiana , and A . anatolicus , A. burduricus belongs to a species group characterized by the presence of stout setae on the male IV-L-6. Acherontacarus burduricus n. sp . differs from all known Acherontacarus species in the shape of IV-L-5, in its basal half slightly enlarged to form a groove, in the distal half with a stout seta. Acherontacarus anatolicus differs from A. burduricus also in the presence of a ventral extension on P-3 ( Boyacı et al. 2010 ). Acherontacarus cedro and A. rutilans have a relatively shorter P-2, but a longer P-5 ( Gerecke & Benfatti 2004 ). Acherontacarus vietsi can be easily distinguished by the presence of only two thick setae on IV-L-6 and A. bicornis is characterized by a thick seta on the expanded distal half of IV-L-6 ( Valdecasas et al. 2005 ). IV-L-6 is not expanded in A. anatolicus , A. nicoleiana , and A. burduricus . Acherontacarus anatolicus and A. burduricus (8-9 stout setae in IV-L-6) differ from A. nicoleiana with 6-7 stout setae in the same region. In A. dividuus and A. burduricus , IV-L-5 and IV-L-6 are approximately equal in size while in A. nicoleiana , IV-L-5 is longer than IV-L-6 ( Gerecke & Benfatti 2004 ; Valdecasas et al. 2005 ; Boyacı et al. 2010 ).