Bursaustium zabolensis Noei, 2019

Noei, Javad, Podineh, Farzad Minab & Ramroodi, Sara, 2019, Modification in the generic diagnosis of Bursaustium (Acari: Erythraeidae) with description of a new species from southeast of Iran, Persian Journal of Acarology 8 (2), pp. 107-116 : 108-113

Bursaustium zabolensis Noei sp. nov. ( Figs. 1–16 )

Diagnosis ASens 53–55, Ti III 70–77, IP 867–969.

Description (larva, n = 5)

Dorsum ( Figs. 1–2 , 12 , 13–16 ) – Dorsum of idiosoma with ~120–146 barbed setae with long setules ( Fig. 1 and Table 1). Scutum with a distinct crista metopica between triangular anterior sensillary area and fusiform posterior sensillary area ( Figs. 2 , 13–16 ). The triangular anterior sensillary area bearing AL scutalae anterolaterally on scutum and one pair of anterior sensilla (ASens). The fusiform posterior sensillary area bearing one pair of posterior sensilla (PSens). ASens longer than PSens and with long barbs in distal half. PSens filiform and barbed. The edge of the dorsal scutum is very lightly chitinized and is separable from the dorsal idiosomal skin only by the absence of striations. ML and PL scutalae present upon the lightly chitinized area, at the edge of scutum ( Figs. 2 , 13–16 ). Posterolaterally on each side of scutum one eye (diameter 20–22). AL shorter than ML and PL, all barbed with long setules.

Venter – Idiosoma ventrally with one pair of sternal setae (1a) and four pairs setae (three pairs in one paratype, ARS-20181127-2e) between coxae I and II; between coxae II and III ~50–77 setae (excluding sternal setae 3a); and ~50–59 ventral setae behind coxae III. Each leg coxa with one seta. A peg-like supracoxal seta present on coxa I, 5 long ( Fig. 3 ). NDV = ~220–280 ( Table 1). All ventral setae barbed with long setules .

Gnathosoma – Cheliceral bases punctate on dorsal surface, cheliceral base 47–62 long; cheliceral blade slightly curved, 10 long, with one median tooth. Subcapitulum with a nude galealae (cs), 16–20 long and two hypostomalae, anterior (as) nude, 10–12 long and posterior (bs) barbed with long setules, 27–37 long; palp femur 27–37 long, with one dorsal and one ventral seta, both barbed with long setules and palp genu 13–17 long, with a long, nude dorsal seta. Palp tibia 10–12 long, with three setae (one barbed, one nude and one conical seta); palpal tibial claw 10–17; palp tarsus 5–8 with five setae (one barbed and four nude setae), one solenidion and one eupathidium; fPp = 0-BB-N-BNN-4NBωζ. Palpal supracoxal setae (eP) peg-like, 5 long ( Figs. 4–5 ).

Legs – Leg segmentation formula 7-7-7. Leg setal formula ( Table 2): Leg I: Ta - 1ω, 2ζ, 1Cp, 19–20n (20n in holotype, ARS-20181127-2a and one paratype, ARS-20181127-2b and 19n in three paratypes, ARS-20181127-2c, d, e); Ti - 2φ, 1Κ, 11n; Ge - 10, 1Κ, 11n; TFe - 5n; BFe - 3n; Tr - 1n ( Figs. 6–7 ). Leg II: Ta - 1ω, 2ζ, 1Cp, 18–20n (18/19n in one paratype, ARS-20181127-2c and in one paratype uncountable, ARS-20181127-2e); Ti - 2φ, 11n; Ge - 10, 1Κ, 9n (10n in one paratype on the left side, ARS-20181127-2b); TFe - 5n; BFe - 3n; Tr - 1n ( Figs. 8–9 ). Leg III: Ta - 1ζ, 21n; Ti - 1φ, 11n; Ge - 10, 9n; TFe - 5n (4n in one paratype on the right side, ARS-20181127-2b which is an abnormality); BFe - 3n; Tr - 1n ( Figs. 10–11 ). Each leg tarsus with lateral falciform claws and a claw-like empodium. The lateral falciform claws with relatively long onychotrichs.ventrally .

Metric data are given in Table 1. Tables 1 and 2 show differences between all species of the genus.

Etymology

The specific epithet is derived from the type locality, Zabol , Sistan and Baluchestan province, Iran .

Type material

The holotype (ARS-20181127-2a) was collected from soil and litter sample (off host) under a Tamarix aphylla (Linnaeus) (Tamaricaceae) , IRAN: Sistan and Baluchestan province, Zabol city, Jazinak (30° 54' 07" N, 61° 41' 34" E), 27 April 2018, col. F. Minab Podineh; four paratype (ARS- 20181127-2b, c, d, e) larvae same data as holotype except Zahak (30° 54' 20" N, 61° 40' 24" E) , 20 April 2018 under Tamarix stricta Boiss.

Type deposition

The holotype (ARS-20181127-2a) and three paratype larvae (ARS-20181127-2b, c, d) are deposited in the Acarological Collection , Jalal Afshar Zoological Museum ( JAZM), Department of Plant Protection , Faculty of Agriculture , University of Tehran, Karaj , Iran; one paratype larva (ARS-20181127-2e) is deposited in the collection of the Department of Plant Protection , College of Agriculture, University of Zabol, Iran ( DPPZ) .

Remarks

The new species belongs to the genus Bursaustium based on the diagnostic characters of Bursaustium in the present paper. Bursaustium zabolensis Noei sp. nov. is similar to B. norbakhshi Saboori, 2002 in leg setal formulae but differs from it in the longer MW (31–33 vs. 24 in B. norbakhshi ), ML (25–30 vs. 19), ASens (53–55 vs. 36), 2a (17–21 vs. 12), 2b (19–22 vs. 12), 3b (21–24 vs. 12), cs (16–20 vs. 12), Ti I (55–60 vs. 39), Ge I (57–62 vs. 48), TFe I (27–30 vs. 19), leg I (281–324 vs. 237), Ta II (45–55 vs. 36), Ti II (47–52 vs. 31), Ge II (50–55 vs. 39), TFe II (25–30 vs. 14), BFe II (35–37 vs. 24), leg II (269–296 vs. 202), Ta III (47–57 vs. 39), Ti III (70–77 vs. 43), Ge III (57–62 vs. 51), TFe III (32–35 vs. 21), BFe III (35–45 vs. 27), leg III (311–349 vs. 244), IP (867–969 vs. 683), shorter MA (15–17 vs. 24), number of cheliceral teeth (with a median tooth vs. without tooth), and differs from B. gaspari (data from Haitlinger 2000, 2006) in the longer ASens (53–55 vs. 20–30), Ti III (70–77 vs. 52–65), Ge III (57–62 vs. 48–52) and IP (867–969 vs. 744– 844).

Leg setal formula was not determined for B. gaspari in recent re-examination and thus no comparison with the new species is presented. Collecting further specimens of B. gaspari from the original location will allow to analyze the range of normal setae for comparison.

determination number of setae on the other part of legs because of bad condition the specimen has been difficult.

Figures

Figures 1–2. Bursaustium zabolensis Noei sp. nov. (larva) – 1. Dorsal view of idiosoma; 2. Dorsal scutum.

Figures 3‒5. Bursaustium zabolensis Noei sp. nov. (larva) – 3. Ventral view of idiosoma; 4. Ventral view of palpal tibia and tarsus; 5. Dorsal (right) and ventral (left) view of gnathosoma.

Figures 6‒9. Bursaustium zabolensis Noei sp. nov. (larva) – 6. Ti I-Ta I; 7. Tr I-Ge I; 8. Ti II -Ta II; 9. Tr II-Ge II.

Figures 10‒12. Bursaustium zabolensis Noei sp. nov. (larva) – 10. Ti III-Ta III; 11. Tr III-Ge III; 12. Habitus.

Figures 13‒17. 13–16. Bursaustium zabolensis Noei sp. nov. (larva) – Dorsal scutum position on dorsal surface of propodosoma; 17. Dorsal scutum of the holotype of B. gaspari, sent by Prof. R. Haitlinger.