Gonothrombium ozkani, Karakurt, İbrahim, Sevsay, Sevgi & Buğa, Evren, 2016

Karakurt, İbrahim, Sevsay, Sevgi & Buğa, Evren, 2016, A review of Gonothrombium Feider, 1950 (Actinotrichida: Microtrombidiidae) with description of a new species from Turkey, Zootaxa 4154 (1), pp. 51-65 : 52-58

Gonothrombium ozkani sp. nov.

Diagnosis. Adults. Accessory posterior process of crista metopica markedly long and hammer-like. Dorsal opisthosomal (pDS) setae with peduncle, relatively thin and long, whole stem with fine setules and narrowed progressively towards pointed tip.

Diagnosis. Larvae. Scutellum bearing multiple (10–14) setae. LSS = 119–130. 3a setae nude. Tarsal claws formula: 2-2-3.

Descriptions. Adults (n = 11). Standard measurements in Table 1. Body length 1076–1416, width 761–1060 ( Fig. 1 ). Body dark red colour when alive.

Gnathosoma. Chelicerae and palps typical ( Figs. 2, 3 ). Medial face of palp tibia with two ctenidia and radula. Distal ctenidium with 2–5 (plus paradont) spinisetae situated behind paradont; proximal ctenidium composed of 3– 7 uniform spinisetae; radula consists of 4–13 long and very strong spine-like setae ( Fig. 4 ). Lateral face of palp tibia with one basidont placed at base of palp tarsus and with several long, smooth, whip-like setae at base of odontus. Palp tarsus long and cylindrical with numerous setulose setae and one solenidia laterally, 3–4 solenidia in distal part ( Fig. 5 ).

Character G. ozkani (♀) Holotype G. ozkani (n=10) Paratypes min.– G. oudemansianum (n=5)

max. min.–max. LB 1340 1076 – 1416 1227 – 1350 WB 960 761 – 1060 853 – 866 LB/WB 1.39 1.3 – 1.47 1.43 – 1.55 Ch BS (L) 175 135 – 185 165 – 172 Ch BS (W) 80 65 – 90 60 – 85

Ch Cl 72 63 – 73 53 – 75

PaTr (L) 75 60 – 75 65 – 77

PaTr (W) 68 65 – 75 65 – 70

PaFe (L) 175 160 – 200 168 – 173 PaFe (W) 122 110 – 140 128 – 130 PaGe (L) 100 76 – 100 72 – 90

PaGe (W) 78 70 – 95 81 – 87

PaTi (L) 90 70 – 90 86 – 88

PaTi (W) 40 30 – 41 35 – 40

Odo (L) (Lf/Rt) 68/62 60 – 70/60 – 68 40 – 60/54 – 60 Par (L) (Lf/Rt) 22/25 20 – 28/21 – 30 30/29 – 35 diCt(n) (Lf/Rt) 5/4 2 – 5/2 – 5 3/2

prCt(n) (Lf/Rt) 5/5 3 – 7/3 – 7 6/4 – 7

Bas (n)(Lf/Rt) 1/1 1/2 1/1

Bas (Lf/Rt) (pr→di) -/40 37 – 42/37 – 42 42/41 – 43 Rad (n)(Lf/Rt) 6/ 6 4 – 13 / 4 – 11 10/6 – 11 PaTaSol(n) 4 – 5 4 – 5 4/4 – 5

PaTa (L) 78 60 – 80 62 – 80

PaTa (W) 28 23 – 30 21 – 22

mdS [S] 17 – 28 13 – 28 7 – 16

mdS [P] 5 – 7 4 – 7 3 – 4

pdS [S] 17 – 28 15 – 32 10 – 24

pdS [P] 5 – 7 4 – 7 4 – 6

vS [S] 19 – 28 15 – 29 22 – 30

vS [P] 5 – 7 4 – 7 4 – 6

CML 312 270 – 317 272 – 275 CMW 50 45 – 55 47 – 50

ASB 33 28 – 35 37 – 38

PSB 15 13 – 16 17 – 20

AM (n) 54 49 – 63 37 – 38

AM (L) 55 – 65 54 – 76 50 – 60

RCM 180 162 – 191 130 – 152 SAL 52 46 – 53 55 – 61

SAW 50 47 – 53 47 – 50

SB 21 18 – 21 23 – 26

SE 151 145 – 165 115 – 125 pPr 80 67 – 83 7597

acpPr 28 25 – 29 17 – 20

OL 47 40 – 50 40 – 45

......continued on the next page Idiosoma. Aspidosoma triangular in outline. Anterior part of crista metopica long, extending to vertex which bears numerous long, setulose, nonsensillary setae (AM); rounded sensillary area bears two short, smooth sensillary setae; posterior process relatively broad and short; accessory posterior process hammer-like, relatively long and distinct. Double and sessile eyes, located at mid-lateral sides of crista metopica; anterior lens larger than posterior lens ( Fig. 6 ). Dorsal opisthosomal setae ( Fig. 7 ) of one type, slender, leaf-like (15–32) and with peduncle. Stem of pDS narrowed progressively towards tip and with fine setules; stem of mid-dorsal and ventral setae slightly shorter than posterodorsal setae. All setae based on short, cylindrical papillae. External genitalia with three pairs of genital acetabula and composed of a pair of epivalves and centrovalves with a single line of setae on each of them. Typically, epivalves with setulose setae and centrovalves with smooth setae ( Fig. 8 ).

Legs. Legs without lamellar processes, shorter than idiosoma. Tarsus I elongate, tibia I shorter than tarsus I ( Fig. 9 ).

Description. Larva (n = 20). Standard measurements in Table 2 . All larvae reared from eggs deposited by females in the laboratory. Body length 272–319, width 171–214. Colour in life red.

Gnathosoma. Cheliceral blades with a small subterminal tooth. Adoral setae short and smooth. Hypostomal setae (bs) spine-like. Palp femur and genu without seta. Palp tibia bears three setae: a long nude seta, a spine-like seta and a minute seta. Palp tibial claws bifid. Palp tarsus with one solenidion, two eupathidia, three long nude setae and a short nude seta ( Fig. 10 ). f Pp formula:0-0-0-NNN2-NNNNωζζ.

Idiosoma dorsum ( Fig. 11 ). Scutum pentagonal; middle of lateral borders slightly concave, anterior border and middle of posterior border convex. The whole surface of scutum longitudinally striate and punctate with three pairs of nonsensillary and one pair of sensillary setae. AM, AL and PL setae barbed. AM and PL setae subequal length, AL setae shorter than AM and PL. S setae with few barbs in middle of stem. Pair of double-lensed eyes situated on posterolateral border of scutum. Anterior lens larger than posterior lens. Scutellum wider than scutum, with longitudinal striations, punctate and bearing multiple (10–14) barbed setae. All dorsal setae situated on plates (each plate almost same width), barbed and arranged in five rows. C row bears 6 + (10–14). Numbers of setae on D and E rows 8–10, F row with six setae, H row with four setae. Length of dorsal setae 46–67 (shortest setae in H row).

Idiosoma venter ( Fig. 12 ). Claparéde’s organs laterally between coxae I and II. ƒCx formula: BB-B-B. One pair of intercoxal setae 3a nude. Four pairs of opisthoventral barbed setae situated on platelets. ƒV formula: 2-2u-4. Ventral setae slightly thinner than dorsal setae.

Legs ( Figs. 13–18 ). Legs segmentation formula: 6-6-6 (femora of legs ventrally divided, with slight line of fusion evident). All segments punctate. Legs setal formula: [I] Tr (1B) – Fe (5B, 1N) – Ge (4B, 2σ, 1κ) – Ti (6B, 2φ, 1κ) – Ta (17B, 2ζ, 1ω, 1ε); [II] Tr (1B) – Fe (4B, 1N) – Ge (2B, 1σ) – Ti (5B, 2φ) – Ta (14B, 1ζ 1ω, 1ε); [III] Tr (1B) – Fe (3B, 1N) – Ge (2B, 1σ) – Ti (5B) – Ta (13B). Solenidion on tarsus I backwardly curved. Tarsus I and tarsus II with two trifurcate claws; tarsus III with a pair trifurcate claws and a slender claw-like empodium.

Etymology. This species is named in honour of Prof. Dr. Muhlis Özkan (Uludağ University, Bursa, Turkey), a leader of Turkish acarologists, for his great and valuable contributions to Acarology in Turkey.

Type material. Holotype: One female collected in Demirözü Town, Bayburt Province, Turkey (40°15'34'' N, 39°57'32'' E, 1620 m a.s.l., moist moss, 0 1.05.2013, leg. İ. Karakurt and H. H. Özbek) . Paratypes: One female and nine adults were obtained from Berlese funnels in Kop Gateway, Bayburt Province, Turkey (40°02'16'' N, 40°30'48'' E, 2417 m a.s.l., moist moss and near the stream, 18.05.2014, leg. İ. Karakurt and H. H. Özbek) . Larvae obtained from female (holotype) and one other female (paratype) by experimental rearing. The type material and other specimens were deposited in Acarology Laboratory of Erzincan University, Erzincan, Turkey.

Distribution. Turkey.

Laboratory observations. Laboratory data is given Table 2 .

Figures

FIGURES 1 – 9. Gonothrombium ozkani sp. nov., female (holotype). 1. General view. 2. Chelicera 3. Palp, medial aspect, setae omitted. 4. Palp tibia and tarsus, medial aspect. 5. Palp tibia and tarsus, lateral aspect. 6. Crista metopica region. 7. Posterior dorsal setae (pDS). 8. Genital opening. 9. Tibia and tarsus I, setae omitted. (Scale; Figure 1 = 400, Figures 2 – 6, 8 – 9 = 50, Figure 7 = 20).

FIGURES 10 – 12. Gonothrombium ozkani sp. nov., larvae. 10. Gnathosoma. 11. Idiosoma (dorsum). 12. Idiosoma (venter). (Scale; Figure 10 = 50, Figures 11 – 12 = 100).

FIGURES 13 – 18. Gonothrombium ozkani sp. nov., larvae. 13. Leg I (trochanter-tibia). 14. Leg I (tarsus). 15. Leg II (trochanter-tibia). 16. Leg II (tarsus). 17. Leg III (trochanter-tibia). 18. Leg III (tarsus). (Scale; Figures 13 – 18 = 50).

Tables

TABLE 2. Laboratory data on G. ozkani sp. nov. females.

	Oviposition date	Eggs Prelarval stage	Number of larvae
Female (Holotype) (Col. date 0 1 May 2013)	0 5 May 2013	20–25 red eggs within 10–21 May a packet	21
Female (Paratype) (Col. date 18 May 2014)	22 May 2014	20–25 red eggs within 27 May – 0 3 May a packet	22