Two new chigger mites of the genus Aboriginesia (Acari: Trombiculidae) Author Kováčik, Ján Ninmica 172, 020 01 Slovak Republic Author Kalúz, Stanislav Institute of Zoology, Slovak Academy of Sciences, Dúbravská cesta 9, 845 06 Bratislava, Slovak Republic. text Zootaxa 2010 2010-07-30 2554 1 23 36 https://biotaxa.org/Zootaxa/article/view/zootaxa.2554.1.2 journal article 10.11646/zootaxa.2554.1.2 1175-5326 5303641 Aboriginesia ludmilae , new species Description: Larva. SIF = 7BS-B-3-3-1-1-1-1-0-0-0; fsp=7-7-7; fPp = B-B-N.N.B; Ga = B; fCx = 1-2-1; fSt = 2-4; Numbers of dorsal and ventral setae (holotype-minimal-mean-maximal-standard deviation)(n = 12): DS = 66-62-68-70-2,64; VS = 50-45-52-63-6; NDV = 116-114-122-130-5,38; fDS = 4H-8(12)-6(8)-10(13)- 6(7)-8(12)-10(10)-6(6)-2(2)-2(2) = 62-76; Dorsum ( Fig. 1 ). Scutum anteriorly and laterally subquadrate, posteriorly semirounded, slightly wider than long, with AL, AM, PL, PPL and two sensillae. Small scutal puncta cover prevailing part of scutum. Sensilla ciliated, with 7–12 short lateral cilia situated in second half of sensilla. Oval eyes (2 + 2) in ocular plates, eyes laterally at the level of PL. Humeral setae 51–60 µm long, dorsal anterior 37–48 and posterior setae 37–49 µm long, thickly ciliated, dorsal setae arranged in irregular rows, rows varying in number and in the position of setae. Scutum . ( Tab. 1 ). PL>AM>AL; SB=ASB=PSB(mean values); SD<AW<PW; SB situated at the level of P- PL and slightly anteriorly or at the level of PL setae. TABLE 1 . Aboriginesia ludmilae sp. n. —measurements of scutum (n = 22).

Holotype	Minimal	Mean	Maximal	Standard deviation
AW	83	77	82	91	3.01
PW	108	95	106.7	118	5.61
PPW	82	70	78.1	85	4.06
SB	34	34	36.8	40	1.47
ASB	33	29	35.9	43	3.03
PSB	32	29	35.6	44	3.70
SD	65	63	71.5	87	5.70
AP	32	31	35.2	38	2.12
AM	60	52	61.3	68	3.91
AL	55	48	57.2	66	4.53
PL	73	66	75.3	80	3.10
PPL	60	51	61	66	3.52
Sensilla (length)	89	71	84.2	97	7.36

Venter ( Fig. 2 ). Three pairs of sternal setae, two posterior between coxae III. Second coxa with 2 setae, arranged in tandem to posterior margin of coxa. Ventral side generally with 45–63 irregularly arranged thickly ciliated setae. Anterior setae shorter than caudal ones. Lengths of ventral setae vary and increase from anterior (34–40) to median (33–48) and posterior (43–48) setae. Gnathosoma ( Fig. 3 ). Galeala barbed. Palps 66–78 long, slender palpotibial claw 20–32 long, with 3 deeply indented prongs. Chelicera of stout and hooked contour, anteriorly with tricuspid cap and three convexities in basal part. FIGURE 1. Aboriginesia ludmilae sp. n. –– idiosoma dorsal. FIGURE 2. Aboriginesia ludmilae sp. n. –– idiosoma ventral. Legs ( Figs. 4–5 ). With pretarsus, claws and normal empodia. Setae on legs ciliated, slender, relatively short. Specialized setae on leg segments: Leg I - S 1 , f 1 , (PT´, ST, pST) = N, 2 tibialae, 1 microtibiala, 3 genualae, 1 microgenuala; Leg II - S 2 , f 2 , PT´´= N, 2 tibialae, 1 genuala; Leg III - 1 mastitarsala, 1 tibiala, 1 genuala. Number of plumose setae on leg segments (leg formula): Leg I: Cx (1) - Tr (1) - Bf (1) - Tf (5) - G (4) - Ti (6) - Ta (22); Leg II: Cx (2) - Tr (1) - Bf (4) - Tf (3) - G (6) - Ti (6) - Ta (17); Leg III: Cx (1) - Tr (1) - Bf (2) - Tf (3) - G (3) - Ti (6) - Ta (13); Leg measurements are presented in Table 2 . TABLE 2 . Aboriginesia ludmilae sp. n. —length of legs (n = 18).

Holotype	Minimal	Mean	Maximal	Standard deviation
leg I	316	290	309.5	325	11.35
leg II	299	278	299.1	317	13.23
leg III	366	336	349.8	371	12.00
Ip	981	923	957	1013	26.21

FIGURE 3. Aboriginesia ludmilae sp. n. –– chelicera, palps (A—ventral, B—dorsal). Differential diagnosis: Aboriginesia ludmilae sp. n. belongs to the species with 3 genualae I and fCx = 1- 2-1. Until recently one other described species, Aboriginesia montana (Kudryashova) , had these two features and differs from A. ludmilae sp. n. by having Ga = N and fSt = 2-2, while A. ludmilae sp. n. has fSt = 2-4 and Ga = B. Two other close species are Aboriginesia armata (Schluger & Bibikova) and A. tokobajevi (Hushcha & Kharadov) . These species differ from A. ludmilae sp. n. in having the coxal formula fCx = 1-1-2 and PPL setae situated between the scutum and ocular plate, and completely barbed palpal segments fPp = B-B-B.B.B, while A. ludmilae sp. n. has PPL setae on the scutum, fCx = 1-2-1 and fPp = B-B-N.N.B. Material studied. Holotype : 1 larva , Alpes Mts , Switzerland , Kanton district , collected from small rodents during the years 1970-75, more detailed collecting data unavailable . Paratypes : 25 larvae , Alpes Mts , Switzerland , Kanton district , collected from small rodents during the years 1970-75, more detailed collecting data unavailable . Holotype (accession number SZ 6940) and 10 paratypes (SZ 6941) are deposited in Slovak National Museum , Bratislava , Slovakia . Remaining paratypes are deposited in the collections of authors . Etymology : The species is named after Mrs. Ludmila Kováciková, the wife of the senior author, who helped the authors during the elaboration and study of chiggers.