Trombidium demirsoyi, Sevsay & Buğa & Elverici, 2020

Sevsay, Sevgi, Buğa, Evren & Elverici, Mert, 2020, A new species of the genus Trombidium (Acari: Trombidioidea) parasitic on a spider species in Turkey, Acarological Studies 2 (1), pp. 34-40 : 34-35

Trombidium demirsoyi sp. nov. Sevsay and Buğa

Diagnosis

Larvae: Hypostomalae setae (bs = subcapitular setae) short in the shape of crown, with equal length, finger-like protrusions. Solenidion on tarsus I situated at ca. 2/3 length of the segment. Setae on scutellum situated at half length of the sclerite. AM setae nude.

Post larval instars unknown.

Description

Larva (n = 11): Measurements are given in Table 1 (the given measurements are average values from six specimens). Live specimens red, and with dark red eye spots.

Gnathosoma. Hypostom alae setae (bs) s tout, crown-like, regularly arranged, distally ca. 10 equal length, finger-like protrusions ( Figs 1, 8, 9). Cheliceral blade curved posteriorly, with a small distal tooth-like process on the internal edge of blade. Subcapitulum punctate. Palptibial claw divided entire length. Palpal femur with one nude seta. Palptibia with three setae; two barbed setae (proximal seta distinctly longer than the distal seta), and one nude seta shorter than the others. On palpal tarsus; one long seta with distinct barbs, two short setae with short and sparse barbs, two eupathidia and a solenidion ( Figs 2, 10). The pedipalp formula: 0-N-0-BBN-BBBζζω(?ω).

Idiosoma. Scutum and scutellum porous on the whole surface. Scutum rounded anteriorly, posterior border straight and posterior corners rounded ( Fig. 3). Anterior part of scutum longitudinally striated and continues slightly to rear of chiti nous bar (tear-like). Setae; AM nude ( Fig. 11), AL covered with very fine setulae, PL barbed. Sensilla (S) located at equal distance to AL and PL setae. Scutellum bears one pair of barbed c 1 setae (45-52) situated at the middle of the sclerite. Scutum and scutellum of the same width ( Fig. 12). Two pairs of eyes at the level of posterior edge of scutum. Anterior lens larger in diameter than the posterior lens (anterior 10, posterior 7). All dorsal setae with barbs. Setae in rows C-F situated on small sclerites, with barbs covering the whole shaft. Setae h 1 located on a common sclerite. f D formula: (2)4-6-4-4-2.

Ventral surface of idiosoma with one pair of intercoxal setae (3a) between coxae III ( Fig. 4). Coxal fields punc tate. f Cx= NBN-BB-B (including supracoxal seta). Supracoxala and seta 1a smooth (forked on the right side of the holotype), 1b distinctly barbed. Setae on coxae II and III barbed. f V = 4u-2-2 .

Legs. Leg segmentation formula: 6-6-6. Leg setal formula: Leg I ( Fig. 5): T r (1n)- Fe (5n)- Ge (4n, 2σ, 1Κ,)-Ti (5n, 2φ, 1Κ)- Ta (16n, 1ω, 1ε, 2ζ). Leg II ( Fig. 6): Tr (1n)- Fe (4n)- Ge (3n, 1 σ, 1Κ)- Ti (4n, 2φ)- Ta (12n, 1ω, 1ε). Leg III ( Fig. 7): Tr (1n)- Fe (5n)- Ge (3n, 1σ)- Ti (5n)- Ta (11n).

Solenidion (ω) on tarsus I situated at ca. 2 / 3 length of the segment. The posterior claw on tarsus III modified, reduced in length and slightly displaced towards the lateral side of tarsus. Tarsus III with short ensiform seta and an accessory sword-like seta. The stylostome (a feeding canal formed within the host tissues) of the engorged larvae quite distinctive ( Fig. 13).

Type material

Holotype and paratypes larvae were collected from two adult male Zodarion thoni (one larva from one spider and four larvae from the other) captured by pitfall trapping, and six larvae, off-host, were extracted from soil samples with a Berlese funnel. All specimens were collected from the same field in Çanakkale Province, Turkey by M. Elverici on 6 June, 2016. He also identified the spider .

Etymology

This species is named in honour of Emeritus Professor Ali Demirsoy (Hacettepe University) for his efforts to develop entomology, evolutionary biology and zoology in Turkey.