Tenuipalpus caudatus (DugŁs, 1834)

Andre, H. M., 2011, DUG ¨ S’ CAUDATUS IS A TENUIPALPIDAE AND NOT A TYDEIDAE (ACARI) Henri M. A, Acarologia 51 (1), pp. 69-85: 76-77

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http://doi.org/ 10.1051/acarologia/20111990

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Tenuipalpus caudatus (DugŁs, 1834)


Redescription of Tenuipalpus caudatus (DugŁs, 1834)  

Habitus as in Fig. 2A View FIGURE , opisthosoma with a clear constriction at the level of trochanter III and the "tail" mentioned by DugŁs (1834b) ( Fig. 2D View FIGURE ). Shape of setae variable ( Fig. 3 View FIGURE ), from minute setae, flagelliform, squamous, lanceolate, or foliaceous, thin and long, to serrate or plumose organs.

Prodorsal shield ( Fig. 2A, C View FIGURE ) with longitudinal cells on a median crest except for a small posterior portion with irregular and transverse cells, lateral part with transverse striae and minute pores, anterolateral shield with two ocelli, posterolateral corners of prodorsum angulate. Prodorsal setae, (v2) and (s1) minute, slightly serrate; s2 on a small tubercle behind a anterolateral projection and broadly lanceolate.

Opisthoma with a strong median crest prolonged anteriorly by another crescent-like crest. Cells on the crest with well-defined borders and rounded contours, with more or less transverse striae along the median crest. A second projection over trochanter III. A pair of opisthosomal pores distinct, (po). Setae minute (e1, d3), or foliaceous (c1, d1, c3), "tail" composed of four pairs of foliaceous setae (e2, f1, f2 and h1) plus one pair of flagelliform setae (h2).

Epimeral formula: 3-2-2-1, 3a being central ( Fig. 2E View FIGURE ). Genital opening transverse in females, with transverse striae ( Fig. 2B View FIGURE ). Genital formula: two pairs of genitals, (g1) and (g2), and one pairs of aggenitals, (ag1). Anal lips with longitudinal striae and flanked by pseudanals, (ps).

Whip-like chelicerae (ch) as in the superfamily, bordered by an adoral seta, (ad1), and likely to protrude as in Figure 4A View FIGURE . Two-segmented palp with 1 flagelliform dorsal seta on the proximal segment and 2 small setae (probably eupathidial) on the distal one ( Fig. 4B, C View FIGURE ).

Leg formula ( Fig. 4E–G View FIGURE ):

I (8(1)-4-3-4-1), ventrals on tibia serrate, ventrals on femur and seta on trochanter very thin, most other setae squamous or foliaceous

II (8(1)-4-3-4-1), idem

III (5-3-1-2-2) ventral setae on trochanter, femur and tibia thin, the other foliaceous,

IV (5-3-0-2-1), idem.

Tarsi III and IV ( Fig. 5 View FIGURE ) with an antixial dorsal flagelliform seta arising from a tubercle, ft, two serrate prorals arising also from tubercles, (p), and two plumose ventral setae (u). Tarsi I and II with a paraxial dorsal flagelliform seta arising from a tubercle, ft’, this elbowed element seems to form a pair with a squamous seta arising from a tubercle, ft". Under this dorsal pair, also arising from their own tubercle, a pair of typical eupathidia, (p). Between the prorals, the solenidion ω, also on a tubercle. Last, the two pairs of setae, (tc) and (u). All the apoteles with 3 bifid elements (ol’, om and ol") equipped with tenent hairs ( Fig. 4D View FIGURE ).