Paraplonobia (Anaplonobia) haloxylonia, Kamran, Muhammad, Mirza, Jawwad Hassan & Alatawi, Fahad Jaber, 2016

Kamran, Muhammad, Mirza, Jawwad Hassan & Alatawi, Fahad Jaber, 2016, The genus Paraplonobia Wainstein and Neopetrobia Wainstein (Acari, Trombidiformes, Tetranychidae) from Saudi Arabia: new species, new records and key to the world species of Paraplonobia, ZooKeys 598, pp. 27-55 : 31-36

Taxon classification Animalia Prostigmata Tetranychidae

Paraplonobia (Anaplonobia) haloxylonia sp. n. Figs 9-10, 11-15, 16-19, 20, 21, 22-24, 25-28

Diagnosis.

Dorsal setae lanceolate, densely serrate, not set on tubercles and distinctly shorter to the distances of setae next behind, dorsocentral setae (c1, d1 and e1) almost 1/3 to the distance of setae next behind, propodosoma medially with weak, longitudinal irregular striations, hysterosoma with transverse and closely spacedstriations medially, stylophore slightly notched anteriorly, peritremes anastomosed distally, with few long thread like branches, and hysterosomal striations closely spaced, leg I shorter than body.

Description of holotype female

(n = 39). Measurements of holotype followed by 38 paratypes (in parenthesis) (Figs 9-19).

Dorsum (Fig. 9). Body oval; length of idiosoma 583 (578-585), maximum width 372 (369-378), length of body (gnathosoma + idiosoma) 658 (655-663). Propodosoma medially with weak, longitudinal irregular striations; laterally longitudinal regular striations; hysterosomal striations medially transverse and closely spaced, laterally longitudinal irregular. Dorsal setae lanceolate, densely serrate, not present on tubercles and distinctly shorter to the distances of setae next behind, dorsocentral setae (c1, d1 and e1) almost 1/3 to the distance of setae next behind, Length of dorsal setae: v2 28 (26-29), sc1 24 (23-25), sc2 22 (21-24), c1 19 (18-21), c2 22 (21-23), c3 25 (24-28), d1 15 (12-16), d2 18 (17-19), e1 16 (15-17), e2 20 (19-20), f1 25 (24-28), f2 31 (29-32), h1 34 (32-35). Distance between dorsal setae: v2-v2 72 (70-73), v2-sc1 75 (72-78), sc1-sc2 66 (63-67), sc1-sc1 167 (163-172), sc2-sc2 254 (250-259), c1-c1 90 (88-92), c1-c2 75 (71-78), c2-c3 81 (78-85), c2-c2 231 (229-234), c3-c3 373 (372-375), d1-d1 91 (89-92), d1-d2 65 (62-69), d2-d2 204 (201-206), c1-d1 103 (100-104), c3-d2 160 (158-161), e1-e1 55 (53-57), e1-e2 53 (50-54), e2-d2 85 (82-86), e2-e2 150 (148-152), f1-f1 60 (59-62), f2-f2 80 (78-83), f1-f2 28 (25-29), f1-d1 93 (91-94), h1-h1 31 (28-32).

Venter (Figs 10-12). Idiosoma ventrally with transverse simple striations from setae 1a to 3a; longitudinal irregular between setae 3a and 4a; transverse posterior to setae 4a; striations longitudinal irregular anterior to aggenital setae (ag). Length of intercoxal and coxal setae: 1a 25 (24-26), 3a 19 (19-21), 4a 22 (21-23), 1b 33 (31-33), 1c 22 (21-24), 2b 24(23-25), 2c 22 (21-23), 3b 23 (22-24), 4b 27 (26-28); aggenital setae, ag 28 (27-28), ag–ag 32 (29-32); genital setae two pairs, g1 31 (30-33), g2 20 (19-21), g1-g1 32 (31-33), g2-g2 35 (34-36), g1-g2 10 (10-12); anal setae three pairs, ps1 11 (10-12), ps2 16 (15-17), ps3 17(16-18), ps1-ps1 16 (15-18), ps2-ps2 22 (20-23), ps3-ps3 26 (25-26); para–anal setae two pairs, h2 16 (15-17), h2- h2 14 (13-16), h3 17 (15-17), h3-h3 31 (30-32) (Fig. 10). Spermathecae elongate, star shaped structure at distal end (Fig. 11-12).

Gnathosoma (Figs 13-15). Stylophore slightly notched anteriorly. Peritremes anastomosed distally, with few long thread like branches (Figs 13-14). Scapular setae m 22 (21-23), m–m 17 (16-18). Palp femur and genu each with one seta, palp tibia with three setae, tibial claw strongly curved; palp tarsus with three setae, three eupathidia, one solenidion (Fig. 15).

Legs (Figs 16-19). Length of legs I–IV (without coxae) 507, 328, 340, 400 respectively. Leg I shorter than body length. Number of setae and solenidia (in parenthesis) on legs I–IV: coxae 2 –2–1– 1, trochanters 1 –1–1– 1, femora 9 –6–4– 4, genua 5 –5–4– 4, tibiae 13(1) –9–9– 9; tarsi I with 15 tactile setae, two sets of duplex setae at distal end, 11 tactile setae and two solenidia well proximal to duplex setae, two eupathidia; tarsi II with 10 tactile setae, one set of duplex setae, two eupathidia and one solenidion; tarsi III with 12 tactile setae and one solenidion; tarsi IV with 12 tactile setae and one solenidion. True claws pad like each with one pair of tenant hair; empodium pad-like with two rows of small tenant hairs.

Male (n = 11) (Figs 20-28). Dorsum (Fig. 20). Body almost oval, slightly tapering caudally; idiosoma 320-325 long, 190 wide; striations on dorsum entirely dotted; propodosomal striations same as in female, hysterosomal also same as in female except longitudinal/oblique or irregular in the area medially between dorsal setae e1 and h1, shape of setae also same as in female.

Venter (Figs 21-23). Idiosoma ventrally with transverse striations except in the area between ventral setae 3a and 4a and genito-anal area; the area between 3a and 4a with simple dots (without striations); genito-anal setae five pair, genital setae two pairs (g1, g2), anal setae three pairs (ps1, ps2, ps3); para-anal setae two pairs (h2, h3); aedeagus up turned, broadly sigmoid, sharply tapering distally (Figs 22-23).

Gnathosoma. Stylophore and peritremes as in female; palp femur with small horn-like seta, palp genu with one dorsal seta, palp tibia with three setae and strongly curved tibial claw; palp tarsus thumb like with one solenidion, three eupathidia and three setae (Fig. 24).

Legs (Figs 25-28). Length of leg I–IV (without coxae) 366, 223, 250, 289 respectively. Setae with solenidion in parenthesis on legs I–IV as; coxae 2 –2–1– 1, trochanters 1 –1–1– 1, femora 9 –6–4– 4, genua 5 –5–4– 4, tibiae 9(2)+8 duplex–10(1)–9– 9, tarsus I with six pairs of duplex setae (two pairs distally, two pairs at mid and two pairs at proximal part of the tarsus), 15 tactile setae, two eupathidia, one solenidion, tarsus II with one duplex seta, nine tactile setae, two eupathidia, one solenidion, tarsus III with 12 tactile setae, one solenidion, tarsus IV with 13 tactile setae, one solenidion. True claws pad like each with one pair of tenant hair; empodium pad-like with two rows of small tenant hairs.

Etymology.

The specific epithet is derived after the host plant, Haloxylon salicornicum from which some type specimens were collected.

Type material.

Holotype female, one male and two female paratypes, Haloxylon salicornicum ( Amaranthaceae ), Salbookh Road, Dariyah, Riyadh, SA, 24°30.649'N, 46°46.615'E, September, 18, 2012, coll. M. Kamran; four males and 22 female paratypes, Hilaria sp. ( Poaceae ), Tashlia, Heyer Road, Riyadh, SA, 24°29.000'N, 46°47.890'E, January, 17, 2015, coll. J.H. Mirza; five males and four females paratypes, Hilaria spp. ( Poaceae ), Sanabal Farm, Kharaj, Riyadh, SA, 24°16.999'N, 47°11.854'E, January, 23, 2015, coll. M. Kamran.

Remarks. The Paraplonobia (Anaplonobia) haloxylonia sp. n. closely resembles Paraplonobia (Anaplonobia) contiguus ( Chaudhri, Akbar and Rasool 1974) because both species sharing the following set of similar characters; peritremes distally with few branches, dorsal body setae short, subequal in length, lanceolate, prodorsal shield entirely with longitudinal striaitons and hysterosomal striations closely spaced. The new species, differs from Paraplonobia (Anaplonobia) contiguus by comparative length of leg I (shorter than body vs. longer than body), dorsocentral setae (c1, d1 and e1) almost 1/3 to the distance of setae next behind vs. more than half, number of setae on genu I (5 vs. 4) in Paraplonobia (Anaplonobia) contiguus .