Cheylostigmaeus urhani Dönel & Doğan, 2011, sp. nov.

• Main Authors: Dönel, Güldem, Doğan, Salih
• Format: Text
• Language: unknown
• Published: Zenodo 2011
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Arachnida; Prostigmata; Stigmaeidae; Cheylostigmaeus; Cheylostigmaeus urhani; Pacific; Barrow; Point Barrow; Alaska
• Online Access: https://dx.doi.org/10.5281/zenodo.5263001; https://zenodo.org/record/5263001

Cheylostigmaeus urhani sp. nov. Female (Figure 2) Length of body 475 (460–495), width 300 (290–315). Dorsum. Prodorsal shield with four pairs of setae ( vi , ve , sci and sce ) and a pair of eyes. Hysterosomal shield with six pairs of setae ( c 1, d 1, d 2, e 1, e 2, f 1) and suranal shield with two pairs of setae ( h 1 and h 2). Dorsal shields with oval dimples, definable laterally. Dorsal setae with minute spinules and a hyaline sheath distally. Dimensions of setae as follows: vi 90 (80–105); ve 112 (100–127); sci 77 (65–97); sce 110 (105–125); c 1 97 (83–105); c 2 100 (90– 110); d 1 91 (85–97); d 2 87 (80–93); e 1 95 (87–105); e 2 90 (85–95); f 1 120 (122–137); h 1 65 (60–73); h 2 45 (40–58). Distances between setae: vi - vi 55 (47–67); ve-ve 105 (93–110); vi-ve 43 (40–57); sci-sci 173 (165–190); ve-sci 75 (63–93); sce-sce 210 (205–227); sci-sce 50 (43–57); c 1 -c 1 97 (95–100); c 1 -d 1 100 (93–107); d 1 -d 1 123 (120–127); c 1 -d 2 63 (55–70); d 2 -d 2 233 (225–237); d 1 -d 2 90 (87–97); e 2 -e 2 190 (185–193); e 1 -e 1 125 (123–130); e 1 -e 2 57 (53–63); f 1 -f 1 93 (90–97); e 1 -f 1 80 (77–95); e 2 -f 1 115 (110–127); h 1 -h 1 67 (53–70); h 2 -h 2 115 (105–120); h 1 -h 2 43 (35–50). Venter . Humeral shields situated laterally between coxae II and III, bearing setae c 2, similar to other dorsal body setae. Coxisternal shields divided, bearing three pairs of setae ( 1 a , 3 a and 4 a ). Ventral cuticle transversely striated between coxae II–III, coxae I–II and III–IV surrounded by longitudinal striae. Aggenital and anogenital shields each bearing three pairs of setae ( ag 1-3 and ps 1-3). Dimensions of setae as follows: ag 1 = ag 3 23 (20–25); ag 2 27 (23–30); ps 1 35 (30–38), ps 2 27 (23–30) and ps 3 30 (27–33); ps 1 thicker than other anogenital setae. All ventral shields reticulated and faintly punctated. Legs . Leg I 360 (350–370), leg II 297 (290–300), leg III 267 (260–275), leg IV 347 (335–357). Chaetotaxy of leg segments as follows: coxae 2 – 2 – 2 – 2, trochanters 1 – 1–2 – 1, femora 6 – 5 – 3 – 2, genua 4 (κ)– 4 (κ)– 1 – 1, tibiae 7 (ϕ,ϕρ)– 6 (ϕρ)– 6 (ϕρ)– 6 (ϕρ), tarsi 14 (ω)– 10 (ω)– 8 (ω)– 8 (ω). Genua I and II with solenidion κ. All tarsi with solenidion ω. Gnathosoma. Chelicera 175 (165–190), palp 195 (187–200). Subcapitulum with two pairs of adoral setae ( ro 1,2) distally and two pairs of subcapitular setae ( m , n ) proximally. Palp setal formula (from trochanter to tarsi): 0–3 – 2 – 2 + 1 claw+ 1 accessory claw– 5 + 1 ω+ 1 tridentate eupathidium. Dimension of setae: m 48 (43–53); n 40 (35–48); distances between setae: m-m 40 (35–50); m-n 30 (25–35); n-n 48 (30–55). Holotype. Male (Figures 3, 4) Length of body 395 (365–400), width 255 (200–260). Dorsum. Oval dimples on dorsum. Prodorsal shield with four pairs of setae and a pair of eyes. Hysterosomal shield with six pairs of setae and suranal shield with two pairs of setae. Dorsal setae with minute spinules and a hyaline sheath distally except for setae h 1. Dimensions of setae as follows: vi 50 (45–55); ve 67 (50–70); sci 35 (30–40); sce 57 (50–60); c 1 50 (48–60); c 2 40 (37–45); d 1 45 (40–45); d 2 65 (60–73); e 1 57 (50–65); e 2 60 (57–65); f 1 105 (95–110); h 1 25 (20–30); h 2 60 (55–65). Distances between setae: vi-vi 55 (47–65); ve-ve 95 (75–105); vi-ve 53 (47–60); sci-sci 145 (135–158); ve-sci 35 (30–40); sce-sce 155 (140–160); sci-sce 30 (25–33); c 1 -c 1 85 (75–93); c 1 -d 1 77 (63–87); d 1 -d 1 95 (85–110); d 2 -d 2 171 (157–193); d 1 -d 2 67 (50–77); e 2 -e 2 150 (143–157); d 1 -e 1 67 (55–83); e 1 -e 1 93 (87–107); f 1 -f 1 87 (78–90); e 1 -f 1 50 (35–53); e 2 -f 1 93 (80–103); h 1 -h 1 35 (27–40); h 2 -h 2 75 (63–87); h 1 -h 2 35 (30–43). Venter . Coxisternal shields divided, reticulated and faintly punctated, bearing three pairs of setae. Aggenital shield bearing three pairs of setae. Dimensions of aggenital setae as follows: ag 1 23 (15–25); ag 2 = ag 3 20 (18–27). Anogenital covers bearing three pairs of setae. Setae ps 3 is simple, ps 2 and ps 1 strong and spine-like situated on an elongated process. Aedeagus 100 (80–105), calyx cup-shaped, bulb capacious, enwraps thickened midsection of aedeagus. Two pairs of accessory copulatory appendages present: unciform appendages long, divergent posteriorly; forcipiform appendages short and spatulate, extending inside of unciform appendages. Legs . Leg I 283 (255–297), leg II 193 (177–200), leg III 173 (163–185), leg IV 227 (200–220). Chaetotaxy of leg segments as follows: coxae 2 – 2 – 2 – 2, trochanters 1 – 1–2 – 1, femora 6 – 5 – 3 – 2, genua 4 (κ)– 4 (κ)– 1 – 1, tibiae 7 (ϕ,ϕρ)– 6 (ϕρ)– 6 (ϕρ)– 6 (ϕρ), tarsi 15 (ω,ω 3)– 11 (ω,ω 3)– 9 (ω,ω 3)– 9 (ω,ω 3). Gnathosoma. Chelicera 130 (125–143), palp 144 (135–158). Palp setal formula (from trochanter to tarsi): 0–3 – 2 – 2 + 1 claw+ 1 accessory claw– 5 + 1 ω+ 1 tridentate eupathidium. Palp femur with apophyses. Subcapitulum with two pairs of adoral setae distally and two pairs of subcapitular setae proximally. Setae m located on one pair of bicuspidate lamella. Dimension of setae: m 23 (18–27), n 25 (23–30); distances between setae: m-m 30 (23–37), m- n 23 (20–25), n-n 25 (20–27). Etymology. This species is named in honour of Prof. Dr. Raşit Urhan (Pamukkale University, Denizli, Turkey) for his great and valuable contributions to Acarology in Turkey. Type materials. Holotype 3, 4 33 paratypes and 3 ƤƤ paratypes from grassy soil, 40 ° 16 ' 23 '' N, 39 ° 37 ' 51 '' E, 1758 m, Köse Mountain, 14 VII 2009; ZMAU. Remarks. This new species closely resembles Cheylostigmaeus pannonicus Willmann by setae m located on one pair of bicuspidate lamellae. However, it differs from the latter by: ratio sce : sci = 1.4 [ sce 110 (105–125), sci 77 (65–97)] in female of the new species versus 1.1 ( sce 75 + 4, sci 67 + 4) in the U.S.A. specimens (Summers & Ehara 1965); the distance of e 1 - e 1 [125 (123–130)] is subequal that of d 1 - d 1 [123 (120–127)] in female of the new species but d 1 - d 1 (122 + 11) is longer than that of e 1 - e 1 (110 + 7) in the U.S.A. specimens (Summers & Ehara 1965); the lateral rostral lamellae of both original and redescribed males of C. pannonicus are much larger than those in the new species (Willmann 1951; Summers & Ehara 1965); in all specimens of C. pannonicus apophyses on the palp femur are absent (Willmann 1951; Summers 1957 a; Summers & Ehara 1965) whereas the new species has apophyses on the palp femur. : Published as part of Dönel, Güldem & Doğan, Salih, 2011, The stigmaeid mites (Acari: Stigmaeidae) of Kelkit Valley (Turkey), pp. 1-56 in Zootaxa 2942 on pages 4-8, DOI: 10.5281/zenodo.201260 : {"references": ["Summers, F. M. & Ehara, S. (1965) Revaluation of the taxonomic characters in four species of the genus Cheylostigmaeus Willmann (Acarina: Stigmaeidae). Acarologia, 7, 49 - 62.", "Willmann, C. (1951) Untersuchungen uber die terrestrische Milbenfauna im pannonischen Klimagebiet Osterreichs. Stizungsberichte der Osterreichischen Akademie der Wissenschaften Vienna, Mathematisch e Naturwissenschafiliche Klasse, Abtheilung I 160, 91 - 176.", "Summers, F. M. (1957 a) Two mites of the genus Cheylostigmaeus, including a new species from Point Barrow, Alaska. The Pan-Pacific Entomologist, 33 (4), 163 - 169."]}