Protoribatidae Balogh and Balogh, 1984
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publication ID |
https://doi.org/ 10.1051/acarologia/20142131 |
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persistent identifier |
https://treatment.plazi.org/id/8A7F87CB-FE27-FD73-1912-FCA0FC1DD9FB |
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treatment provided by |
Marcus |
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scientific name |
Protoribatidae Balogh and Balogh, 1984 |
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Protoribatidae Balogh and Balogh, 1984 View in CoL Protoribates (Protoribates) sp.
( Figs. 10 – 12 View FIGURE View FIGURE View FIGURE )
In the present paper, one specimen was described as Protoribates sp. Although it may prove in the future being representatives of new species, it were not designed as new species in the present paper because only a single, damaged specimen wase found.
Diagnosis — Body length 557 µm; width 329 µm. Rostrum rounded. Anterior notogastral margin straight. Setae ro inserted laterally. Tutorium absent. Setae le originating from tip of lamella. Sensilli composed of long stem and fusiform head, barbed throughout length. Notogaster bearing 10 pairs of minute notogastral setae. Genito-anal setal formula: 5-1-2-3; genital and aggenital setae variable in number. Epimeral setal formula: 3-1-3-3. Monodactylous.
Material examined — One adult female (NSMT- Ac 13790) from the soil surface at the entrance of Kumaso cave. Specimen is deposited in the National Museum of Nature and Science, Tokyo .
Measurements and body appearance — Body length, 557µm; width, 329 µm. Body colour light brown; body surface smooth.
Prodorsum — Anterior rostral margin rounded ( Fig. 10 View FIGURE ). Setae ro (59-55 µm) inserted laterally on rostrum. Lamellae thin, about 0.7 × length of prodorsum. Setae le (91-88 µm) originating from tip of lamella. Setae ro and le extending anterior to rostrum. Setae in (116-134 µm) reaching insertions of setae ro. Setae ro, le, in thin setiform, minutely, sparsely barbed throughout length. Sensilla (105- 105 µm) composed of thin long stem and fusiform head, unilaterally barbed throughout length. Setae ex thick, smooth, spiniform (ca. 16 µm) inserted at lateral base of bothridia ( Fig. 12C View FIGURE ). Bothridia opening antero-dorsally. Relative length: (in-in)> (le -le)> (le -in)> (ro -ro)> (ro -le).
Notogaster — Anterior margin straight, bearing 10 pairs of minute, smooth notogastral setae. Pleurophragmata (hl) distinct. Porose areas Aa (the major axis: 16 µm) located anteriorly between la and lm; A 1 anterior to lp; A 2 posterior to h 3; A 3 lateral to ip. Opisthonotal gland opening (gla) situated latero-anteriorly to h 3. Lyrifissures ia (9-14 µm), im (14-9 µm), ih (ca. 16 µm) and ips (9-9 µm) aligned obliquely, located lateral to c 2, posterior to la, antero-lateral to im and posterior to A 2, respectively. Lyrifissure ip (9-9 µm) aligned perpendicular to notogastral outline, located between p 1 (ca. 9 µm) and p 2.
Ventral region — Genito-anal setal formula: 4[5]- 1[0]-2-3; genital and aggenital setae variable in number, indicated by brackets. Genital setae (10-31 µm) setiform; g 1 longest, thick, barbed throughout length; other setae thin, bearing sparse barbs. Setae ag (ca. 16 µm) thin, smooth setiform, inserted postero-laterally far from genital aperture. Setae an 1 (ca. 32 µm), an 2 (ca. 22 µm) thin, smooth setiform, inserted near mid-distance along plates. Adanal setae thin, smooth, setiform; ad 1, 2 (ca. 31 µm) aligned in post-anal position; ad 3 (18-26 µm) in adanal, near anterior margin of aperture. Lyrifissures iad (ca. 14 µm) located parallel to outline of aperture, anterior to level of an 2, posterior to ad 3 ( Fig. 11 View FIGURE ). Genital (54 µm) and anal (141 µm) apertures roughly circular in shape; distance between them (154 µm) about one-third genital aperture length. Sternal ridge observable. Epimeral borders 1-3, sj distinct. Epimeral setal formula: 3-1-3-3; setae setiform (15-33 µm); 3 c longest; 1 a shortest; 1 b thickest, sparsely barbed; other setae smooth. Subcapitular setae 3 pairs; a (ca. 35 µm) thick setiform, bearing few barbs; m (ca. 6 µm) thin, smooth setiform; h (ca. 36 µm) thick setiform, barbed throughout length ( Fig. 12C View FIGURE ).
Legs — Monodactylous; claw minutely dentate (40 µm) ( Fig. 12D View FIGURE ). Setal formula: I (1-5-3- 4-20), II (1-5-2-4-14), III (2-3-1-3-14), IV (1-2-2-3- 14). Measurements (µm) of [right-left] segments: I ([?-16]-[91-96]-[?-31]-[?-80]-[?-71]); II ([9-?]-[?-91]- [24-19]-[66-56]-[62-64]); III ([?-49]-[?-72]-[?-27]-[55- 59]-[55-53]); IV ([68-66]-[69-67]-[33-39]-[72-78]-[72- 69]). On tarsus I, famulus ε (ca. 7 µm) consisting of obtuse tip and expanded basal portion, situated posterior to ω 2; ω 2 (ca. 44 µm) posterior to ω 1 (ca. 36 µm); ft’ (ca. 37 µm) posterior to ε; ω 1, ω 2 terminating in obtuse tip ( Fig. 12A View FIGURE ). Solenidion ’ 1 (ca. 122 µm) inserted on apophyses (ca. 17 µm) protruding at the tip of tibia I; ’ 2 (ca. 27 µm) lateral to ’ 1 on the same apohyses. On genu I, solenidion σ (ca. 64 µm) terminating in a fine tip. Femora II, IV and trochantera IV bearing ventral keel ( Fig. 12B View FIGURE ).
Remarks — The genus Protoribates (Protoribates) contains 40 known species and three known subspecies worldwide, of which two species bear a superficial resemblance to the present specimen. P. (P.) mollicoma ( Hammer, 1973) and P. (P.) yezoensis ( Fujikawa, 1983) have straight anterior notogastral margin, long lamellar and interlamellar setae, and ad 1, 2 aligned in post-anal position as seen in the present specimen. However, the present specimen is different from P. (P.) mollicoma in length of ad 1 and ad 2, and insertion of ad 3. The former has adanal setae ad 1-3 of the same length, and ad 3 inserted the anterior margin of the anal aperture, while the latter had adanal setae ad 1, 2 longer than ad 3 and ad 3 inserted in front of anterior margin of the anal aperture. The present specimen is different from P. (P.) yezoensis in the form of rostrum and insertion of an 1, 2. The former has a round rostrum, and setae an 1, 2 inserted near midway along the plates, while the latter has a rostrum with a median elevation, and seta an 1 inserted near the posterior margin of the anal plate.
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