Rhodacarellus iraniensis, Castilho, Raphael C., Jalaeian, Mahdi & De, Gilberto J., 2012

Castilho, Raphael C., Jalaeian, Mahdi & De, Gilberto J., 2012, Two new species of Rhodacaridae (Mesostigmata: Rhodacaroidea) from Iran, Zootaxa 3248, pp. 35-42: 39-41

publication ID

http://doi.org/ 10.5281/zenodo.213008

persistent identifier

http://treatment.plazi.org/id/225B0F69-C676-DB09-FF58-FF5DFC7149AF

treatment provided by

Plazi

scientific name

Rhodacarellus iraniensis
status

sp. n.

Rhodacarellus iraniensis   sp. n.

Material examined. Holotype female and one paratype female from soil of an orchard at Najafabad (32 ° 38 ’N, 51 ° 23 ’E, alt. 1754 m), Isfahan Province, Iran, 12 April 2003; three paratype females from soil of an orchard at Borkhar (32 ° 81 ’N, 51 ° 54 ’E, alt. 1590 m), Isfahan Province, Iran, 22 July 2003; three paratype females from soil of an orchard at Falavarjan (30 ° 51 ’N, 51 ° 32 ’E, alt. 1600 m), Isfahan Province, Iran, 27 Jun 2003; one paratype female from soil of an orchard at Khomani Shahr (32 ° 41 ’N, 51 ° 32 ’E, alt. 1602 m), Isfahan Province, Iran, 7 July 2002. All types collected by M. Jalaeian. The holotype and five paratype females are deposited in the Acarological Collection, Zoological Museum, College of Agriculture, Tehran University, Karaj, Iran; three paratype females deposited at Departamento de Entomologia e Acarologia, Escola Superior de Agricultura “Luiz de Queiroz” ( ESALQ), Universidade de São Paulo ( USP), Piracicaba, State of São Paulo, Brazil.

Adult female ( Fig. 7–12 View FIGURES 7 – 12 ) (Five specimens measured). All setae smooth.

Gnathosoma. Fixed cheliceral digit 33 (33–34) long, with five teeth in addition to apical tooth and a setiform pilus dentilis; dorsal cheliceral seta absent ( Fig. 7 View FIGURES 7 – 12 ); movable cheliceral digit 35 (34–35) long, with three teeth in addition to apical tooth. Numbers of setae on palp trochanter – tarsus: 2-5 - 6-14 - 15. Epistome with anterior margin smooth and provided with three extensions and a pair of short spines; pair of spatulate anterolateral extensions about two thirds the length of the aciculate anterocentral extension, all smooth, except for denticles at the tip of the anterolateral extensions ( Fig. 8 View FIGURES 7 – 12 ). Deutosternal denticles in seven roughly transverse rows of about uniform lengths, each with 8–14 denticles ( Fig. 9 View FIGURES 7 – 12 ). Internal malae seemingly fused to each other at the base; with four - five basal fimbriae. Corniculi diverging in mounted specimens. Seta h 3 directly posterior to h 1 and slightly posterior and mediad to h 2. Measurements of setae: h 1 15 (15–16), h 2 8 (8–9), h 3 14 (13–14), sc 13 (13–14).

Dorsal idiosoma ( Fig. 10 View FIGURES 7 – 12 ). Podonotal shield smooth, except for a narrow punctate band next to the insertions of j 1, j 2 and z 1, and along straight posterior margin; 142 (139–144) long and 134 (132–135) wide at widest level; with 19 pairs of setae (s 1 and r 1 absent) and seven pairs of distinguishable lyrifissures. Unsclerotised integument along lateral margins of podonotal shield with three pairs of setae (s 2, s 3 and r 4). Opisthonotal shield smooth, except for a narrow punctate band along slightly convex anterior margin; 159 (157–160) long and 104 (101–106) wide at widest level; with 15 pairs of setae, nine pairs of distinguishable lyrifissures and a pair of pores anterolaterad of J 5; with a pair of ellipsoidal structures posterior to J 3 and a pair of ellipsoidal and a pair of rounded structures posterior to J 4, apparently corresponding to muscles insertions. Unsclerotised integument along lateral margins of opisthonotal shield with four pairs of setae (R 1 -R 4); seta R 5 absent. Measurements of setae: j 1 12, j 2 15 (14–15), j 3 13 (12–13), j 4 16 (15–16), j 5 13 (13–14), j 6 14 (13–15), z 1 6 (5–7), z 2 14 (13–14), z 3 15 (14–15), z 4 14 (14–15), z 5 15 (14–15), z 6 18 (18–19), s 2 5 (5–6), s 3 6, s 4 21 (20–22), s 5 21 (21–22), s 6 16 (16–17), r 2 5 (5–6), r 3 27 (26–28), r 4 8 (7–8), r 5 9 (8–10), r 6 23 (22–24), J 1 13 (12–13), J 2 13, J 3 12 (12–13), J 4 17 (17–18), J 5 15 (14– 15), Z 1 17 (17–18), Z 2 17 (17–18), Z 3 33 (32–33), Z 4 21 (21–22), Z 5 42 (41–42), S 1 16 (16–17), S 2 15 (15–16), S 3 18 (17–18), S 4 23 (23–24), S 5 24 (23–24), R 1 9 (8–9), R 2 7 (6–8), R 3 7 (7–8), R 4 11 (11–12).

Ventral idiosoma ( Fig. 11 View FIGURES 7 – 12 ). Base of tritosternum 18 (15–19) long and 9 (8–10) wide proximally ( Fig. 12 View FIGURES 7 – 12 ); laciniae 51 (50–52), separated for about 95 % of their total length, pilose. Sternal shield smooth and with anterior margin indistinct; region anterior to the first pair of lyrifissures lightly sclerotised and punctate; posterior margin concave; approximately 89 (87–92) long, including the lightly sclerotised punctate region, 69 (68–70) wide at widest level; with four pairs of setae and three pairs of lyrifissures. With a pair of ellipsoidal structure between sternal and genital shields, apparently corresponding to muscles insertions. Genital shield smooth, except for a punctate ellipsoidal region near convex posterior margin; longer than wide; extending posteriorly behind coxae IV; distance between st 5 - st 5 34 (32–36). Unsclerotised integument posterolaterad of st 5 with two pairs of lyrifissures. Unsclerotised integument along anterior margin of ventrianal shield with two pairs of setae (Jv 1 and Zv 1); distinct ellipsoidal structure anterior to ventrianal shield might correspond to a transversal fold of the cuticle of this region. Ventrianal shield mostly smooth, with inverted U-shaped punctate band; 107 (106–108) long and 93 (90–95) wide at widest level, not fused to dorsal shield; with lateral margins straight to slightly convex; with five pairs of setae (Jv 2 -Jv 4, Zv 2 and Zv 3) in addition to circum-anal setae, and three pairs of distinguishable lyrifissures; post-anal seta about 1.7 times as long as para-anal setae; with a pair of ellipsoidal and a pair of rounded structures posterolaterad and posteromesad of Jv 3, respectively, apparently corresponding to muscles insertions. With a pair of elongate metapodal plates, whose anterior end is round and contains a pore-like structure, located well behind insertion of coxa IV. Peritreme extending anteriorly to level of posterior margin of coxa II. Peritrematal shield not much wider than peritreme in the region next to it, constrict behind stigma and fused to exopodal and endopodal shields next to coxa IV, constrict anterior to peritreme, but expanding beyond s 3 and extending to level between z 1 and z 2; distally approaching but not fusing to dorsal shields. Measurements of setae: st 1 15 (14–15), st 2 15 (15–16), st 3 14 (14– 15), st 4 15 (14–15), st 5 12 (11–13), Jv 1 9 (9–10), Jv 2 14 (13–14), Jv 3 16 (15–16), Jv 4 30 (28–31), Zv 1 12 (11–12), Zv 2 11 (11–12), Zv 3 16 (15–17), para-anal 25 (23–26), post-anal 44 (42–45).

Spermathecal apparatus. Not distinguishable.

Legs. Lengths: I: 257 (256–259); II: 175 (171–179); III: 160 (157–164); IV: 213 (211–215). Numbers of setae on legs I –IV: coxa: 2, 2, 2, 1; trochanter: 6, 5, 5, 5; femur: 13, 11, 6, 6; genu: 13, 11, 9, 10; tibia: 14, 10, 8, 10; tarsi II –IV: 18, 18, 17. For all segments, chaetotaxy follows what was reported by Evans (1963) for “ Rhodacarus   - group” of the Rhodacaridae   . Setae pd - 2 of genu II (20), ad - 1 of genu III (20), ad - 1 of femur IV (25), ad - 1 of genu IV (26) and ad - 1 of tibia IV (26) distinctly longer than other dorsal setae of the same respective segments (8–10, 9 – 10, 13–15, 10 – 11 and 10–11). Seta pd- 2 of tarsus IV erect, about as long as other dorsal setae of the same segment. Pretarsi I –IV similar in shape, each consisting of an elongate ambulacral stalk, a pair of strongly sclerotised claws, and three rounded pulvillar lobes; pretarsus I about half as long as other pretarsi.

Adult male. Unknown.

Etymology. The name iraniensis   is derived from Iran, the country where the type specimens were collected.

Remarks. Rhodacarellus iraniensis   is most similar to R. tebeenus Hafez & Nasr   , but the latter has genital shield with posterior margin truncate and without punctate band; a pair of metapodal plates of uniform width and without pore-like structure; peritrematal shield not fused to exopodal and endopodal shields next to coxa IV; and genua III and IV and tibia IV with eight, eight and nine setae, respectively. The following characteristics distinguish other similar Rhodacarellus   species from the species here described: peritreme extending anteriorly to median region of coxa I in R. liuzhiyingi Ma   and R. yalujiangensis Ma   ; lateral margins of ventrianal shield medially constricted in R. shandongensis Ma   ; opisthonotal and ventrianal shields ornamented in R. francescae   Athias- Henriot, R. maxidactylus Karg   , R. montanus Shcherbak   , R. subterraneus Willmann   and R. unicus Karg   ; seta Jv 4 absent in R. epigynialis Shcherbak   ; seta Zv 1 inserted on the ventrianal shield in R. arcanus Athias-Henriot   , R. corniculatus Willmann   , R. kreuzi Karg   and R. moneli Solomon   ; opisthonotal shield with 14 pairs of setae (Z 3 absent) in R. citri Fouly   ; seta Z 5 shorter than Z 3 in R. silesiacus Willmann   ; epistome with anterocentral extension shorter than anterolateral extensions in R. apophyseus Karg   ; and epistome with anterolateral extensions aciculate and paraanal seta about 0.3 times as long as post-anal seta in R. perspicuus Halaškov.  

USP

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