Paulianacarus vietnamese, Fernandez & Theron & Rollard & Castillo, 2014
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https://doi.org/ 10.5252/z2014n4a5 |
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persistent identifier |
https://treatment.plazi.org/id/03D0B226-FFAC-FFEF-1B6D-6647FE6695A9 |
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treatment provided by |
Felipe |
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scientific name |
Paulianacarus vietnamese |
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sp. nov. |
Paulianacarus vietnamese View in CoL n. sp.
( Figs 5-7 View FIG View FIG View FIG ; Table 2)
ETYMOLOGY. — The specific epithet is dedicated to the country Vietnam, where the specimens were collected; vietnamese (Latin = to Vietnam).
TYPE MATERIAL. — Holotype: Vietnam, Kien Giang province; Kien Luong ; Hon Chong, Nui Hon Chong : “nord-est de la colline, bosquet en bas de pente, terre noire fine assez sèche”, 27.I.2003, secondary forest, 1 ♀, Berlese extraction: Louis Deharveng and Anne Bedos leg. (VIET-930). X 104.649000 ; Y 10.139020 alt. 5 m. Paratypes: same data, 2 ♀♀. MNHN, preserved in 70% ethanol .
DIAGNOSIS
Complex microsculpture: punctillate, polyhedral. Three types of setae: simple, small: prodorsum, notogaster, epimeric area, genital paraxially, aggenital, anal, adanal; simple, large, thick: subcapitular a, m 1, m 2; barbate: subcapitular h, genital antiaxially. Prodorsum. triangular, polyhedral; rostrum bilobate; ro setae inserted distant from rostrum; le seta posteriorly and laterally to ro setal insertion level; bo cup-shaped, dorsally opened; si, setiform, small barbs distally; in setae posterior to bothridium and near transverse band; exa, exp positioned marginally. Postbothridial transverse band sb clearly discernible, posterior to le setae and anterior to dorsosejugal furrow.
Notogaster
Sixteen pairs of setae: c 1, c 2, c 3, d 1, d 2, cp, e 1, e 2, f 1, f 2, h 1, h 2, h 3, p 1, p 2, p 3. Transverse band S 2 situated posterior to c setal alignment, only band crossing sagittal plane; S 3, S 4 between c, d setal alignment; S 5 small, behind d setal alignment; S 6 curving, posterior to e 2 setal insertion; S 8 visible in ventral view, anterior to p 3; S 9 posterior to h 2. Five pairs of lyrifissures: ia, ih, im, ip, ips.
Lateral region
Pleuraspis anterior zone rounded lobe; between legs I, II, zone small teeth; unsclerotized longitudinal line exceeding level ih lyrifissure.
Ventral region
Four pairs of subcapitular setae; epimeric setal formulae 3-1-3-4; genital plate undivided, 10 pairs of setae paraxially, four antiaxially; ano-adanal plate incompletely fused; anterior part of plate, presenting a very faint line, permitting identification of both plates in this zone; six pairs of setae; lyrifissure ips present as rounded structure on adanal fold band.
ADULT DESCRIPTION
Measurements
788 µm (815-790) × 441 µm (448-432) (three specimens; deposited in MNHN). All specimens female.
Shape
Ovoid elongate ( Fig. 5A, B View FIG ).
Colour
Yellow to light brown; slightly shiny when observed in reflected light.
Cerotegument
Nonexistent; or disappearing during observation in lactic acid.
Integument
Complex microsculpture; punctillate cuticular surface and a little below polyhedral ( Fig. 7D View FIG ), microsculpture very difficult to observe on cuticular structures for example transverse band.
Setation (legs not included)
Three types: a) simple, small: prodorsum, notogaster, epimeric, genital paraxially, aggenital, anal, adanal, ( Figs 5A, B View FIG ; 6A View FIG ); b) simple, large, thick: subcapitular a, m 1, m 2 ( Fig. 5B View FIG ); c) barbate: subcapitular h, genital antiaxially ( Fig. 5B View FIG ).
Prodorsum
Triangular to slightly polyhedral in dorsal view ( Fig. 5A View FIG ); triangular in lateral view ( Fig. 6A View FIG ). Rostrum with medial rounded incision, defining a bilobate rostrum ( Fig. 6A View FIG ; indicated by arrow), only visible in dorsal or ventral views ( Figs 5A, B View FIG ). Depression housing legs l.d (for legs I and II) ( Fig. 5A View FIG ) well visible as concave arc-shaped zones, situated laterally (arrows indicating the course in Fig. 5 View FIG ); ro setae inserted far from rostrum at level of anterior arched margin of l.d (observed by transparency) ( Fig. 5A View FIG ); le setae placed posteriorly and laterally to ro setae insertion level; le setal insertion found at level of more arched zone of l.d ( Figs 5A View FIG ; 6A View FIG ) (observed by transparency); bo cup-shaped, dorsally opened ( Fig. 6C View FIG ); si setiform, with few small barbs distally ( Figs 5A View FIG ; 6B View FIG ); in inserted posterior to bothridium and near transverse band sb ( Figs 5A View FIG ; 6A View FIG ); exa and exp well visible, situated marginally ( Figs 5A View FIG ; 6A View FIG ). Transverse postbothridial band sb clearly discernible in dorsal and lateral views; situated posteriorly to le setae and anteriorly to dsj furrow; lateral end at bothridial level ( Figs 5A View FIG ; 6A View FIG ).
Notogaster
Sixteen pairs of notogastral setae: c 1, c 2, c 3, d 1, d 2, cp, e 1, e 2, f 1, f 2, h 1, h 2, h 3, p 1, p 2, p 3 clearly discernible ( Figs 5A View FIG ; 6A View FIG ).
Transverse bands: S 2 clearly visible ( Figs 5A View FIG ; 6A View FIG ), situated posterior to c setal alignment, only band crossing sagittal plane; medial limit indistinct and variable among specimens. In dorsal view ( Fig. 5A View FIG ) the limit is between setal insertions c 1 and c 2. In lateral view ( Fig. 6A View FIG ) the same limit almost forming a line terminating near c 3 setal insertion; S 3 and S 4 found between c and d setal alignment ( Figs 5A View FIG ; 6A View FIG ); S 5 small, situated posteriorly to d setal alignment and anteriorly to gla ( Fig. 5 View FIG ); S 6 curving, situated posterior to e 2 setal insertion; S 8 only visible in ventral view ( Fig. 5B View FIG ) anteriorly to p 3 setal level; S 9 situated posteriorly to h 2 setal level ( Figs 5A View FIG ; 6A View FIG ). Five pairs of lyrifissures present: ia, ih, big size, situated below unsclerotized lateral longitudinal line; ia anteriorly on frontal lobe of pleuraspis (see Lateral region); ih situated between h 2, f 2 setal level, well visible in lateral and ventral views ( Figs 5B View FIG ; 6A View FIG ), in ventral view, near S 8 band, but in variable position situated either in front of or behind this band; im large, situated above unsclerotized lateral longitudinal line, near S 6 band, clearly visible in lateral view ( Fig. 6A View FIG ); ip small; visible in ventral view ( Fig. 5B View FIG ); ips rounded, situated on BPAD fold band ( Fig. 5B View FIG ).
Lateral region
Prodorsal margin presenting depression housing legs l.d, clearly visible (indicated with asterisks Fig. 6A View FIG ) for legs I, II; bp well visible. Anterior zone of pleuraspis presenting rounded lobe with lyrifissure ia. Laterally between legs I and II, zone with small teeth ( Fig. 6A View FIG , indicated with double arrow). Anterior notogastral zone presenting conspicuous tectum ( Fig. 6A View FIG ). Unsclerotized longitudinal line easily discernible, exceeding the level of ih lyrifissure and clearly delimiting notaspis and pleuraspis ( Fig.6A View FIG ). Situated posteriorly on same pleuraspis, l.d of legs III, IV. Posterior zone (where unsclerotized line does not exist) very small ( Fig. 6A View FIG ). Several muscular insertions visible ( Fig. 6 View FIG indicated with black arrow).
Ventral region
Subcapitular setae, four pairs ( Fig. 5B View FIG , see Setation). Apodemes well visible; epimeric setal formulae 3-1- 3-4. All setae of similar shape ( Fig. 2B View FIG , see Setation). Genital plate undivided with ten pairs of setae ( Fig. 5B View FIG ); six aligned paraxially and four antiaxially in semi-circle following shape of the genital plate margin. Preanal plate typically shaped, characteristic of the genus ( Fig. 5B View FIG ). Anal plate fused with adanal, delimiting single plate with six pairs of setae ( Fig. 5B View FIG ), anterior part of both plates with faint line, representing vestige of fusion (see Remarks). BPAD clearly visible after lengthy soaking in lactic acid; lyrifissure ips rounded, positioned near band margin ( Fig. 5B View FIG ).
Legs
Setal formulae I (0-5-3-4-16-1) (2-1-2); II (0- 6-3-3-13-1) (1-1-1); III (2-2-3-2-13-1) (1-1-0); IV (2-3-2-2-12-1) (1-0-0).
REMARKS
Microsculpture complicating observation: limits of transverse band S 2 very hard to detect in dorsal view; in lateral view, easier, as this limit almost becomes a line. Number of genital antiaxial setae variable, on one specimen three setae on one side and four on the other.
Anal and adanal plates produce a very interesting situation: plates are fused, but anterior part with line partially delimiting anal and adanal plates; particular microsculpture of aligned points on anal plate, situated parallel, allowing differentiation of plates despite being fused, somewhat similar to Paulianacarus rugulosus Mahunka, 1995 from Thailand. Genital setae number in P. rugulosus is nine, in P. vietnamese n. sp. asymmetric variations in the number of genital and adanal setae were observed, for example with nine-ten genital setae and fourfive adanal setae. Adanal setae show variation in one specimen: one side with five and another with four.
The generic diagnosis of Paulianacarus was made at the same time the author instituted another new genus, Millotacarus Balogh, 1960 , both from Madagascar.Several authors indicated that the differences between these genera were problematic ( Mahunka 1985; Coetzee 2001). Balogh & Balogh 1987 established the differences between them, adding several characters to the diagnosis of Millotacarus , but this did not solve the problem. The possibility exists that Millotacarus may be a synonym of Paulianacarus . The study of type material is needed.
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Museum National d'Histoire Naturelle |
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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