Leptotrombidium mondulkiri Antonovskaia & Morand & Stekolnikov 2024, sp. nov.
Creators: name: Antonovskaia, Anastasia A.
name: Morand, Serge
name: Stekolnikov, Alexandr A.
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Trombidiformes
Trombiculidae
Leptotrombidium
Leptotrombidium mondulkiri

description: Leptotrombidium mondulkiri sp. nov.
(Figs. 1A, B, 2, 3)
Diagnosis. SIF = 7B-B-3-2111.0000; fPp = N/N/BNB; fSc: AM> PL ≥ AL; SB-PL; fCx = 1.1.1; fSt = 2.2; Ip = 686–764; fD = (5–7)H-(16–21)-(12–16)-(9–18)-(2–10)-(2–9)-(2–7)-(1–5)-(0–3)-2(0); DS = 63–83; V = 48–71; NDV = 120–147. Standard measurements are in Table 1.
Description (larva). IDIOSOMA (Figs. 1A, B, 2B–G). Eyes 2+2, on ocular plate; 63–83 heavily barbed dorsal idiosomal setae, including 5–7 humeral setae; separation of humeral and post-humeral setae sometimes unclear; 16–21 setae in 1 st post-humeral row (C excluding humeral setae), 12–16 setae in 2 nd row (D), 9–18 setae in 3 rd row (E); 4 sternal setae and 48–71 ventral setae; total number of idiosomal setae excluding coxal and sternal 120–147.
GNATHOSOMA (Figs. 3A, B). Cheliceral blade with tricuspid cap; gnathobase and palpal femur moderately covered with puncta; gnathobase with one pair of branched gnathocoxal (tritorostral) setae; galeal (deutorostral) seta heavily branched; palpal claw with three prongs; dorsal and ventral palpal tibial setae branched, other palpal setae nude; palpal tarsus with seven branched setae and basal tarsala (ω).
SCUTUM (Figs. 1A, 2A). Rectangular, moderately covered with puncta, with posterior margin straight or slightly concave in center; areas near bases of setae lack of puncta; AM base posterior to level of ALs; SB nearly at level of PLs (P-PL – PSB = –3–3, mean 0); AM> PL ≥ AL; scutal setae barbed similarly to dorsal idiosomal setae; flagelliform sensilla (trichobothria) with 8–10 branches in distal half.
LEGS (Figs. 3C–E). All 7-segmented, with a pair of claws and claw-like empodium. Leg I: coxa with 1 non-specialized branched seta (1B); trochanter 1B; basifemur 1B; telofemur 5B; genu 4B, 2 genualae (σ), microgenuala (κ); tibia 8B, 2 tibialae (φ), microtibiala (κ); tarsus 22B, tarsala (ω) (18 long), microtarsala (famulus, ε) distal of tarsala, subterminala (ζ), parasubterminala (z), pretarsala (ζ). Leg II: coxa 1B; trochanter 1B; basifemur 2B; telofemur 4B; genu 3B, genuala (σ); tibia 6B, 2 tibialae (φ); tarsus 16B, tarsala (ω) (14 long), microtarsala (famulus, ε) behind tarsala, pretarsala (ζ). Leg III: coxa 1B; trochanter 1B; basifemur 2B; telofemur 3B; genu 3B, genuala (σ); tibia 6B, tibiala (φ); tarsus 15B.
Type material. Larval holotype (ZIN 14237, L-521) ex B. savilei No. C 0683, CAMBODIA, Mondulkiri Province, Keo Seima, 23 November 2009; nine larval paratypes (ZIN 14196, 14206, 14215, 14224, 14242, 14246– 14248, 14250) with same data.
Etymology. The species name derived from the name of province, where the type locality is situated.
Differential diagnosis. The new species is similar to Leptotrombidium macacum (Womersley, 1952), belonging to the binbium species group (Vercammen-Grandjean & Langston 1976; Stekolnikov 2013), and differs from the latter in having 5–7 humeral setae vs. 2 (in L. macacum), more numerous idiosomal setae (NDV = 120–147 vs. 94; 16–21 setae in 1 st post-humeral row vs. 10; 12–16 setae in 2 nd row vs. 10), relatively wider scutum (AW 64–70 vs. 60–64, PW 78–85 vs. 72–76, and SB 32–36 vs. 30–31), and slightly shorter setae (H 35–45 vs. 45–47, D min 31–35 vs. 33–43, D max 37–41 vs. 42–58, V min 18–24 vs. 22–31, and V max 32–38 vs. 38–49).
description: Published as part of Antonovskaia, Anastasia A., Morand, Serge & Stekolnikov, Alexandr A., 2024, New species and new records of chigger mites (Acariformes, Trombiculidae) from Cambodia, pp. 343-358 in Zootaxa 5406 (2) on pages 344-346, DOI: 10.11646/zootaxa.5406.2.7, http://zenodo.org/record/10618283