Premicrodispus Cross 1965
Creators: name: Hosseininaveh, Farahnaz
name: Hajiqanbar, Hamidreza
name: Talebi, Ali Asghar
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Trombidiformes
Pygmephoridae
Premicrodispus
Premicrodispus paramaevi

description: Genus Premicrodispus Cross, 1965
Premicrodispus (Premicrodispus) paramaevi Hosseininaveh and Hajiqanbar sp. nov.
(Figures 1–5)
Description
Female. Length of idiosoma 181 (178–184), width 95 (91–97).
Gnathosoma (Figure 3A,B). Gnathosomal capsule about twice as long as its width, dorsally with two pairs of cheliceral setae ch 1 7 (7–8) and ch 2 9 (8–10); ventrally with one pair of subcapitular setae su 7 (7–9); palps short, terminated to small tibial claw, and compressed to gnathosomal capsule, with two pairs of setae, dFe 5 (4–5) and dGe 4 (3–4); cheliceral stylets indiscernible; pharyngeal system (Figure 3C) with three pumps, pumps 1 and 3 reduced, pump 2 large and striated.
Idiosomal dorsum (Figure 1). Prodorsal shield (PrS) with elongate stigmata and distinct tracheal system; all dorsal setae smooth and pointed; prodorsal shield with one pair of capitate trichobothria and one pair of setae sc 2 19 (16–19); all tergites smooth, tergite C with two pairs of setae c 1 22 (19–22) and c 2 24 (20–24); tergite D with one pair of setae d 29 (25–29) and one pair of rounded cupuli ia; tergite EF with two pairs of setae e 21 (18–21) and f 25 (22–26), setae f longer than setae e; tergite H with two pairs of setae h 1 21 (18–21), h 2 20 (16–20) and one pair of rounded cupuli ih; Distances between dorsal idiosomal setae: sc 2 – sc 2 22 (22–23), c 1 – c 1 31 (27–31), c 2 – c 2 52 (52–58), d–d 13 (13–15), e–e 55 (48–55), e–f 13 (12–14), f–f 23 (23–26), h 1 – h 1 13 (13–14), h 1 – h 2 18 (13–18), h 2 – h 2 47 (40–47).
Idiosomal venter (Figure 2). Ventral plates smooth; all ventral setae smooth and pointed; apodemes 1 and 2 reaching to presternal apodeme (appr), sejugal apodeme (apsej) joined with appr, apodemes 3 extending beyond setae 3 a and apodemes 4 reaching to setae 3 b, apodeme 5 short; anterior border of poststernal plate concave and posterior border of poststernal plate tripartite; coxal field I with two pairs of setae 1 a 14 (13–14) and 1 b 14 (13–14); coxal field II with two pairs of setae 2 a 19 (16– 19) and 2 b 17 (14–17); coxal field III with three pairs of setae 3 a 14 (12–14), 3 b 14 (13–14) and 3 c 13 (10–13), setae 3 b, 3 a and 3 c subequal; coxal field IV with three pairs of setae 4 a 11 (10–11), 4 b 18 (16–18) and 4 c 14 (12–14); pseudoanal segment PS with two pairs of setae ps 1 12 (11–12) and ps 3 11 (10–11).
Legs. All legs five-segmented except leg І (four-segmented).
Leg I (Figure 4A). Setal formula: Tr1-Fe3-Ge4-TiTa15(4) (number of solenidia in parentheses). Tibiotarsus with solenidion ω 1 8 (7–8), ω 2 4 (4–5), φ 1 6 (6–6) and φ 2 3 (3–3), solenidia ω 1, φ 1 and φ 2 finger-shaped and striated, ω 1 longer than φ 1 and φ 2, solenidion ω 2 uniformly thin; with five eupathidial setae (p ″, ft ′, ft ″, tc ′, tc ″), setae tc ′ longer than tc ″, setae pv ′ longer than pv ″; setae d longer than k, setae v ″ longer than v ′, setae l ′ longer than l ″; genu with setae l ′ longer than other setae of the segment, setae v ′ and v ″ subequal; femur with setae l ′ and v ″ subequal and both shorter than d; trochanter with seta v ′.
Leg II (Figure 4B). Setal formula: Tr1-Fe3-Ge3-Ti4(1)-Ta6(1). Tarsus with solenidion ω 6 (6–7) finger-shaped, setae pv ″, pv ′ and pl ″ subequal, setae u ′ shortest on this segment; tibia with a finger-shaped solenidion φ 4 (3–4), setae v ′ longer than v ″, setae v ″ longer than d and l ′; genu with three setae, v ′ longer than l ′ and setae l ′ longer than l ″; femur with seta d longer than v ″ and setae v ″ longer than l ′; trochanter with seta v ′.
Leg III (Figure 5A). Setal formula: Tr1-Fe2-Ge2-Ti4(1)-Ta6. Tarsus with setae pl ″, pv ′, pv ″, tc ″ and tc ′ subequal, setae pv ″ weakly barbed, setae u ′ shortest on this segment; tibia with solenidion φ 2 (2–3) and setae d, l ′ and v ″ shorter than v ′; genu with seta l ′ weakly barbed and shorter than v ′; femur with setae d longer than v ′; trochanter with seta v ′.
Leg IV (Figure 5B). Setal formula: Tr1-Fe2-Ge1-Ti4(1)-Ta6. Tarsus with seta tc ′ longer than tc ″ and weakly barbed, setae pv ′ longer than pv ″, setae u ′ as long as pv ″, setae pl ″ shortest on the leg; tibia with small solenidion φ 2 (1–2), setae v ″, v ′ and l ′ subequal and almost two times shorter than d, setae d and v ′ weakly barbed; genu with seta v ′ as long as femoral seta v ′; femur with setae d about two times longer than v ′; trochanter with seta v ′.
Male and larva unknown.
Differential diagnosis
The new species is distinguished from congeners by having two pairs of cheliceral setae, rounded cupuli and reduced pump 3 of pharyngeal system. On the other hand, due to presence of setae 4 a, absence of setae ps 2 and subequal setae ps 1 and ps 3, the new species is similar to Premicrodispus parasilvestris (Rack, 1974) but differs from it by setae d distinctly longer than distance between their bases (setae d distinctly shorter than distance between their bases in P. parasilvestris). The new species is similar to Premicrodispus dzumaevi (Sevastianov and Chydyrov, 1991) because of setae d distinctly longer than distance between their bases but differs from it by subequal setae ps 1 and ps 3 (setae ps 1 distinctly longer than ps 3 in P. dzumaevi). The new species is also similar to Premicrodispus lambi (Krczal, 1964) but differs from it by setae sc 2 shorter than distance between their bases (setae sc 2 longer than distance between their bases in P. lambi), by setae d longer than distance between their bases (setae d shorter than distance between their bases in P. lambi), by setae f subequal to distance between their bases (setae f as half as distance between their bases in P. lambi), by setae h 1 longer than distance between their bases (setae h 1 shorter than distance between their bases in P. lambi) and by shorter setae in coxal fields I–IV (longer setae in coxal fields I-IV in P. lambi).
Type material
Three females found in a vial containing the beetle Lucanus ibericus (Col.: Lucanidae) in 75% ethanol. The host beetle was collected in Naharkhoran forest, Golestan province, northern Iran, 36.46° N, 54.27° E, altitude 450 m., coll. V. Rahiminejad, 27 July 2010.
Etymology
The name of the new species ‘ Paramaevi ’ is derived from combination of two species names parasilvestris and dzumaevi, two species that are most similar to the new species.
description: Published as part of Hosseininaveh, Farahnaz, Hajiqanbar, Hamidreza & Talebi, Ali Asghar, 2014, Two new species of the genus Premicrodispus (Acari: Microdispidae) associated with beetles (Coleoptera: Lucanidae: Tenebrionidae), with a key to Palaearctic species of the genus, pp. 915-931 in Journal of Natural History 49 (15) on pages 916-922, DOI: 10.1080/00222933.2014.953225, http://zenodo.org/record/4004698