Pentamerismus bahaensis, Alatawi & Received & Online, 2015

Alatawi, Fahad Jaber, Received, Muhammad Kamran & Online, Published, 2015, Two new flat mite species of Aegyptobia and Pentamerismus (Acari: Tenuipalpidae) from Saudi Arabia, Turkish Journal of Zoology 39 (2), pp. 244-250 : 247-249

publication ID

https://doi.org/ 10.3906/zoo-1311-12

persistent identifier

https://treatment.plazi.org/id/B95687C7-FFFB-FFE1-FF61-FA77453CFEEC

treatment provided by

Felipe

scientific name

Pentamerismus bahaensis
status

sp. nov.

Pentamerismus bahaensis sp. nov.

Diagnosis. Adult female: Dorsal opisthosomal setae f2 present. Setae c1, c2 sublanceolate and serrate; d1, d2, and e1 small, setiform, and serrate; propodosoma medially with polygonal reticulate patterns, laterally with elongate reticulate elements, hysterosoma with elongate reticulations, medially forming inverted v-shaped pattern between setae d1 and e1. Ventral idiosoma smooth between coxae I – IV except for a narrow band of course transverse striations between coxae II and III; area posteriad 4a with course transverse striations. Ventral shield smooth, genital shield with transverse coarse striations. Setae on palp segments (from tarsus to trochanter): 3(1s + 2e) – 2 – 0 – 1 – 0. Dorsal setae on femur I, II, III, genua I, II lanceolate, barbed, similar to propodosomal setae; genua 3 – 3 – 1 – 0 (d, l ′, l ′′ present); tarsi 9(1) – 9(1) – 5 – 5 (setae tc ′′ present). Tarsal claws uncinate.

Description: ( Figures 8 – 14 View Figure 8 View Figures 9 and 10 View Figures 11–14 ): Female (holotype): Measurements of 4 paratypes in parentheses. Color in life red. Idiosoma oval in shape, length of body (excluding gnathosoma) 269 (265 – 275); (including gnathosoma) 318 (313 – 320) long; width 170 (167 – 176) wide; length of legs I – IV, 126 (123 – 128), leg II 117 (117 – 121), leg III 104 (100 – 106), leg IV 105 (103 – 108).

Dorsum ( Figure 8 View Figure 8 ): Prodorsal shield deeply notched, propodosoma medially with polygonal reticulate pattern, laterally with elongate reticulate elements, hysterosoma entirely with elongate reticulation, medially forming inverted v-shaped pattern ( Figure 8 View Figure 8 ). Area surrounding sejugal suture transversely striated. Prodorsal setae v2 and sc1 subspatulate and serrate, setae sc2 spatulate and serrate, setae v2 slightly longer than half distance of v2 – v2; opisthosoma with 3 pairs of dorsocentral setae (c1, d1, e1); 2 pairs of dorsosublateral setae (c2, d2), 8 pairs of dorsolateral setae (c3, d3, e2, e3, f2, f3, h1, h2), setae c1, c2 subspatulate and serrate, shorter then broadly spatulate and serrate lateral setae, setae d1, d2, and e1 minute, setiform, and serrate. Lengths of dorsal setae: v2 26 (25 – 26), sc1 27 (26 – 28), sc2 21(21), c1 13 (12 – 13), c2 13 (13), c3 16 (15 – 16), d1 7 (6 – 7), d2 7 (6 – 7), d3 17 (16 – 17), e1 7 (7), e2 24 (23 – 24), e3 23 (22 – 23), f2 22 (22), f3 22 (21 – 23), h1 19 (19 – 20), h2 17 (16 – 17); distances between dorsal setae: v2–v2 45 (43 – 46), v2–sc1 34 (31 – 35), sc1–sc1 104 (101 – 105), sc2–sc2 139 (134 – 140), sc1–sc2 25 (23 – 25), c1–c1 46 (44 – 46), c1–c2 32 (31 – 37), c2–c3 33 (30 – 33), c2–c2 112 (107 – 115), c3–c3 163 (161 – 165), c1–d1 37 (34 – 38), c2–d2 37 (36 – 39), c3–d3 34 (33 – 39), d1–d1 40 (38 – 44), d1–d2 38 (36 – 41), d2–d3 25 (24 – 26), d2–d2 113 (110 – 115), d3–d3 159 (155 – 160), d1– e1 49 (47 – 51), e1– e1 40 (37 – 42), e1–e2 66 (64 – 69), e2–e2 166 (166 – 170), e2– e3 23 (22 – 23), e3– e3 154 (150 – 155), e1– e3 59 (57 – 61), f2–f2 138 (135 – 142), f3–f3 112 (109 – 115), f3–f2 22 (22), f2– e1 58 (55 – 60), f2– e3 22 (22), f3–h2 21 (21 – 22), h1–h1 24 (23 – 24), h1–h2 29 (28 – 30), h2–h2 77 (77 – 80), e1–h1 71 (55 – 57) ( Figure 8 View Figure 8 ).

Venter ( Figure 9 View Figures 9 and 10 ): Ventral idiosoma smooth between coxae I – IV excepting a narrow band of coarse transverse striations between coxae II – III; area posteriad 4a with coarse transverse striations. Pregenital area smooth, with 1 pair of aggenital setae (ag); genital shield with transverse course striations, 2 pairs of genital setae (g1–g2), arranged in a transverse row, 3 pairs of pseudanal setae (ps1–3) ( Figure 9 View Figures 9 and 10 ) arranged in longitudinal line along medial edge of anal shields. Length of ventral setae 1a 40 (38 – 42), 3a 60 (57 – 62), 4a 64 (60 – 64), 1b 14 (13 – 14), 1c 13 (13), 2b 38 (34 – 38), 2c 19 (19 – 20), 3b 12 (11 – 13), 4b 13 (12 – 13), (ag) 13 (13), g1 13 (13), g2 15 (14 – 15), ps1–3 9 – 10. Distance between genital setae g1–g1 18 (17 – 18), g2–g2 41 (38 – 42), g1–g2 11 (10 – 11). Setae 1a, 3a, 4a long, smooth. Aggenital, outer genital, and anal setae simple and serrated. Inner genital setae subspatulate and serrate ( Figure 9 View Figures 9 and 10 ).

Gnathosoma (Figure 10). Gnathosoma reaching distal part of femur I; palp 5-segmented. Palp tarsus with 1 solenidion and 2 eupathidia distally, palp tibia with 2 setae; palp genu without seta, and palp femur with 1 dorsal simple seta. Subcapitulum with setae m 9 (9 – 10), m–m 15 (3 – 15).

Legs ( Figures 11 – 14 View Figures 11–14 )

ALATAWI and KAMRAN / Turk J Zool

Setae and solenidia on leg I – IV as follows: coxae 2 – 2 – 1 – 1; trochanters 1 – 1 – 2 – 1; femora 4 – 4 – 2 – 1; genua 3 – 3 – 1 – 0; tibiae 4 – 4 – 3 – 3; tarsi 9(1) – 9(1) – 5 – 5. Leg chaetotaxy as presented in figures. Dorsal setae on femur I, II, II and ventral seta on femur II sublanceolate and serrate, similar to prodorsal shield setae. Tarsal claws uncinate.

Male and immature stages. Unknown.

Type material: Holotype female and 4 female paratypes ex Thuja occidentalis L. ( Cupressaceae ), Baha, Saudi Arabia, 20°6.695′N, 41°26.745′E, 24 April 2013. Coll. M. Kamran.

Etymology: The name of the new species is proposed based on the name of the city from which it was collected.

Remarks: The new species belongs to the erythreus species group of Pentamerismus . The new species closely resembles P. foliisetis Livshitz & Mitrofanov, 1967 ( Livshitz and Mitrofanov, 1967). Both share a deeply notched anterior margin of the prodorsum and setae c1 and c2 are broad and sublanceolate. However, the new species differs from the latter in that the intercoxal area behind setae 4a is transversely striated instead of smooth, the dorsal seta on femur I is sublanceolate instead of long and slender, and the genital flap is transversely striated versus smooth in P. foliisetis . The new species can be distinguished from another related species, P. behsharicus Khanjani & Gotoh, 2008 , by genua I and II each with 3 setae in the new species as opposed to 4 in P. behsharicus (highly unusual presence of a ventral seta on the genu of the Tenuipalpidae ), and dorsal setae c1 and c2 sublanceolate in new species instead of setiform as in P. behsharicus . The host plant of the new species, Thuja occidentalis L. ( Cupressaceae ), is the same as in the other 3 species of Pentamerismus , P. assianensis Thewke and Enns , P. coronatus Canestrini & Fangazo , and P. judiciarus De Leon , which belong to the species group oregonensis, while the new species belongs to the species group erythreus.

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