Tegeocranellus martinezi, Ermilov, Sergey G. & Anichkin, Alexander E., 2014

Ermilov, Sergey G. & Anichkin, Alexander E., 2014, Taxonomic study of oribatid mites (Acari, Oribatida) of Bi Dup — Nui Ba National Park (southern Vietnam), Zootaxa 3834 (1), pp. 1-86 : 40-45

Tegeocranellus martinezi sp. nov.

( Figures 25–28 )

With characters of the genus Tegeocranellus Berlese, 1913 as summarized by Behan-Pelletier (1997).

Diagnosis. Body size 298–332 × 199–249. Lamellar setae longer than rostral setae, all setiform, smooth. Interlamellar setae short, thickened, barbed. Bothridial setae setiform, thickened, ciliate unilaterally. Ten pairs of notogastral setae present (centrodorsal setae absent): c, h 1, p 1– p 3 short, others of medium size (16–20); all barbed. Epimeral setae 1c, 3c and their alveoli absent; setae 1a, 2a represented by alveoli; other setae setiform, smooth. Genito-aggenital and ano-adanal setae simple, smooth.

Description. Measurements. Body length 298 (holotype: female), 298–332 (seven paratypes: five females and two males); body width 199 (holotype), 199–249 (seven paratypes).

Integument. Body color light brown. Body surface smooth. Dorso-lateral sides of notogaster with long striate longitudinal band.

Prodorsum. Rostrum rounded. Lamellae well separated, protruding in medio-distal part. Translamella thin, distinct. Rostral (12–14) and lamellar (6–8) setae setiform, thin, smooth. Interlamellar setae (6–8) thickened, barbed. Bothridial setae (69–77) setiform, thickened, ciliate unilaterally; distal cilia form weakly visible head in some specimens. Exobothridial setae and their alveoli absent. Tutoria (tu) long, widely knife-like.

Notogaster. Anterior notogastral margin well developed, convex medially. Lenticulus (len) large, inverse trapezoid, distinctly visible. Humeral regions with one small, weakly developed concavity. Ten pairs of notogastral setae present: c, h 1, p 1– p 3 short (4–6), thickened, barbed; others of medium size (16–20), setiform, barbed.

Gnathosoma. Subcapitulum longer than wide (77–82 × 61). Subcapitular setae setiform, smooth; a and m (both 12–16) longer than h (8–10). Two pairs of adoral setae (8–10) setiform, smooth. Palps (61) with setation 0–2–1–3–8(+ω). Solenidion little longer than half of palptarsus length, straight, thickened, not attached to eupathidium, inserted in distal part of palptarsus. Chelicerae (77–82) with two barbed setae; cha (24–28) longer than chb (16–18). Trägårdh’s organ distinct.

Epimeral and lateral podosomal regions. Apodemes (1, 2, sejugal, 3, 4) well visible. Epimeral setal formula: 2–1–2–3. Setae 1c, 3c and their alveoli absent; setae 1a, 2a represented by alveoli; other setae (20–24) setiform, thin, smooth. Setae 4a, 4b inserted antero-medially to triangular tubercle. Discidia triangular.

Anogenital region. Six pairs of genital (g 1– g 4, 8–10; g 5, g 6, 6–8), one pair of aggenital (6–8), two pairs of anal (6–8) and three pairs of adanal (6–8) setae setiform, smooth. Lyrifissures iad long.

Legs. Monodactylous; claws smooth. Formulae of leg setation and solenidia: I (1–5–2–4–18) [1–2–2], II (1–5–2–4–15) [1–1–2], III (2–3–1–3–15) [1–1–0], IV (1–2–2–3–12) [0–1–0]; homologies of setae and solenidia indicated in Table 8 .

See Table 2 for explanations.

Type material. Collection data for holotype (female): locality 1 (litter); collection data for seven paratypes (five females and two males): locality 1 (litter).

Type deposition. The holotype is deposited in the collection of the Zoological Institute of the Russian Academy of Sciences, St. Petersburg, Russia; five paratypes are deposited in the collection of the Siberian Zoological Museum, Novosibirsk, Russia; two paratypes are deposited in the collection of the Tyumen State University Museum of Zoology, Tyumen, Russia.

Etymology. The specific name is dedicated to our colleague, acarologist, Dr. Pablo Martinez (Universidad Nacional de Mar del Plata, Mar del Plata, Argentina).

Remarks. The genus Tegeocranellus comprises 17 species, having a cosmopolitan distribution except Antarctic region (data summarized by Subías 2004, updated 2014).

In the absence of centrodorsal notogastral setae and the morphology of notogastral setae (c, h 1, p 1– p 3 short; others of medium size), Tegeocranellus martinezi sp. nov. is most similar to Tegeocranellus kethleyi Behan- Pelletier, 1997 from U.S.A. However, it clearly differs from the latter by the presence of notogastral striate bands (versus absent in T. kethleyi ), pedotecta I without teeth (versus with tooth or teeth in T. kethleyi ) and lamellar setae clearly shorter than rostral setae (versus similar in length in T. kethleyi ).

Figures

FIGURE 25. Tegeocranellus martinezi sp. nov., adult: A—dorsal view; B—lateral view of prodorsum and anterior part of notogaster (gnathosoma and legs I, II not illustrated). Scale bar 100 Μm.

FIGURE 26. Tegeocranellus martinezi sp. nov., adult: A—ventral view (gnathosoma and legs except trochanters III, IV not illustrated); B—posterior view of notogaster. Scale bar 100 Μm.

FIGURE 27. Tegeocranellus martinezi sp. nov., adult: A—rostral seta; B—anterior part of lamella and lamellar seta; C—bothridial seta; D—tutorium; E—notogastral seta la; F—subcapitulum, left half, ventral view; G—palp; H—chelicera; I—part of epimeral region with setae 3 a, 3 b, 4 a, 4 b, 4 c; J—genital plate, left; K—anal plate, left, and adanal setae. Scale bar (A, B, E) 10 Μm; scale bar (C, D, F – K) 20 Μm.

FIGURE 28. Tegeocranellus martinezi sp. nov., adult: A—leg I, without trochanter, left, paraxial view; B—leg IV, left, antiaxial view; C—seta a’ on tarsus II; D—seta pv’ on tarsus II. Scale bar (A, B) 20 Μm; scale bar (C, D) 10 Μm.

Tables

TABLE 8. Leg setation and solenidia of Tegeocranellus martinezi sp. nov.

Leg	Trochanter	Femur	Genu	Tibia	Tarsus
I	v'	d, (l), bv'', v''	(l), σ	(l), (v), φ1, φ2	(ft), (tc), (it), (p), (u), (a), s, (pv), (pl), e, ω1, ω2
II	v'	d, (l), bv'', v''	(l), σ	(l), (v), φ	(ft), (tc), (it), (p), (u), (a), s, (pv), ω1, ω2
III	l', v'	d, l', ev'	l', σ	l', (v), φ	(ft), (tc), (it), (p), (u), (a), s, (pv)
IV	v'	d, ev'	d, l'	l', (v), φ	ft'', (tc), (p), (u), (a), s, (pv)