Eupelops sp.

Nakamura, K., Nakamura, Y. - N. & Fujikawa, T., 2013, Oribatid Mites (Acari, Oribatida) From Tohoku (Northeast Japan), Collected After A Tidal Wave In 2011, Acarologia 53 (1), pp. 41-76 : 64-68

publication ID

https://doi.org/ 10.1051/acarologia/20132081

persistent identifier

https://treatment.plazi.org/id/03F5672C-4E3F-C15B-FE11-F7A7A182BAEB

treatment provided by

Marcus

scientific name

Eupelops sp.
status

 

Eupelops sp.

( Figures 17 – 19 View FIGURE View FIGURE View FIGURE )

Diagnosis — Prodorsal surface granulate; notogastral integument bearing irregular broken angular insular lumps; other body surface punctulate. Tutorium with sharply pointed apex, without dens. Anterior notogastral tectum broadly concave. Notogastral setae spinose bacilliform. Genito-anal setal formula: 6-1-2-2. Epimeral setal formula: 3-1-3- 3. Pedipalpal setal formula: 2-1-3-9[1]. Chelicerae bearing two Trägårdh’s organs. Heterotridactylous.

Material examined — Female (NSMT-Ac 13610) from point A. The present specimen was the other half of only two specimens collected from the point A. Some conspicuous features were remarkable to be justified as a new species, however, the specimen is described only as Eupelops sp. in the present work, because of being rather damaged by preparing for study (body broken)..

Measurements and body appearance — Body colour dark reddish-brown. Prodorsal surface granulate; granules dark, large, closely. Notogastral integument including pteromorphae covered with ornament of irregular broken angular insular lumps. Other surface, namely, lamellae, cuspidis, genitalanal plates, subcapitulum, ventral plate and legs punctulate.

Prodorsum — Setae ro (63 µm) ciliate ensiform with narrow basal portion, inserting on lateral rostral margins at base of free tip of tutorium, extending for short distance anterior of rostral margin. Tutorium with sharply pointed apex, without dens ( Fig. 17C View FIGURE ). Tips of lamellar cuspis terminating in a sharp point, anteroventrally arising lamellar setae ( Fig. 17A View FIGURE ). Setae le (41 µm), thick setiform with sparsely, unilaterally barbed distal portion, reaching anterior margin of rostrum. Setae in (157 µm) narrow phylliform, sparsely spiculate throughout length on dorsal side, smooth on ventral side ( Fig. 17F View FIGURE ). Bothridia opening dorsally. Sensilli (ss) (72 µm) rod-like without narrow apex, spiculate distally, smooth basally ( Fig. 17D View FIGURE ). Setae ex (3 µm) minute, smooth spiniform.

Notogaster — Anterior notogastral tectum broadly concave, projecting further anteriorly than anterior margin of movable pteromorphs, covering basal part of prodorsum ( Fig. 17B View FIGURE ). Notogastral setae bacilliform, spinose throughout their length, smooth basely, variable in length; the shortest c (29 – 30 µm) ( Fig. 17E View FIGURE ).

Ventral region — Genital (64 µm) and anal apertures (62 µm) roughly pentagonal in shape; distance (70 µm) slightly longer than length of each aperture ( Fig. 18A View FIGURE ). Genito-anal setal formula: 6-1-2- 2; all setae short, smooth setiform. Setae g 1, g 2 (9 µm) inserting at the anterior margins of plates. Setae ag (11 µm) inserted latero-posteriorly to genital aperture, near one tenth-distance between genital and anal apertures. Setae an 1 (7 µm) and an 2 (9 µm) inserting near posterior inner and anterior outer margin of plates, respectively. Setae ad 1 (8 µm) aligned in postanal position; ad 2 (6 µm) lateroposteriorly; ad 3 absent. Lyrifissures iad located along outline of aperture, posterior to the level of setae an 2. Epimeral setal formula: 3-1-3-3; setae (9- 19 µm) short, smooth setiform; 3 c the longest ( Fig. 18C View FIGURE ). Pedipalpal setal formula: 0-2-1-3-9[1]. Subcapitulum suctorial, subcapitular setae 3 pairs, a (24 µm), m (11 µm), and h (14 µm); all setae smooth, spiniform, terminating a fine tip ( Fig. 18B View FIGURE ). Chelicerae bearing two Trägårdh’s organs (69 µm) ( Fig. 18D View FIGURE ). Setae cha (17 µm) thin setiform; chb (4 µm) smooth cone-like.

Legs — Heterotridactylous; claws (51 µm) dentate dorsally ( Fig. 19A View FIGURE ) Setal formula: I (1-5-3-4-20), II lost, III (2-3-1-3-14), IV (1-2-2-4-12).Measurements (µm) of right segments: I (51-116-44-55-66), II lost, III (54-73-25-59-62), IV (56-71-43-86-71). Genu I, femur IV and trochantera III-IV bearing protrusion ( Figs. 19 View FIGURE E-G). Solenidiotaxy; I (1-2-2), II lost, III (1- 1-0), IV (0-0-0), solenidion absent on tibiae IV. On tarsus I, famulus ε (15 µm) spiniform, contiguous to ω 1 situated anteriorly between solenidia ω 1 and ω 2; ω 1 (23 µm) bacilliform; ω 2 (45 µm) setiform; seta ft ’ (3 µm) minute setiform inserting posteriorly, contiguous to ω 2 ( Fig. 19B View FIGURE ). On tibia I solenidion ’ 2 (33 µm) situated laterally to ’ 1 (broken) at the tip ( Fig. 19D View FIGURE ). Supracoxal setae recognizable ( Fig. 19C View FIGURE ).

Remarks — The present specimen has rod-like sensilli and concave anterior tectum of the notogaster such as found in Eupelops kumayaensis Nakamura et al., 2010 , and shape of ornament on notogastral integument such as found in E. kumaensis Fujikawa, 2009 . However, this specimen is different from congeners in (1) shape of rostral, lamellar and chelicerae setae, (2) shape of tip of tutorium, (3) length of notogastral setae and Trägårdh’s organs, (4) number of adanal setae, and (5) situation, length and shape of famulus and solenidia of legs.

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