Congocepheus involutus Mahunka, 1997

Fernandez, Nestor, Theron, Pieter, Rollard, Christine & Tiedt, Louvrens, 2013, Family Carabodidae (Acari: Oribatida) V. The genus Congocepheus Balogh, 1958 (second part), with a redescription of Congocepheus involutus Mahunka, 1997, and descriptions of two new species, Zoosystema 35 (4), pp. 551-579 : 553-560

publication ID	https://doi.org/ 10.5252/z2013n4a8
DOI	https://doi.org/10.5281/zenodo.7154295
persistent identifier	https://treatment.plazi.org/id/03BF7571-0063-A02B-FF23-F9E4FDBEEF37
treatment provided by	Felipe
scientific name	Congocepheus involutus Mahunka, 1997
status

Treatment

Congocepheus involutus Mahunka, 1997 View in CoL

( Figs 1-5 View FIG View FIG View FIG View FIG View FIG )

Congocepheus involutus Mahunka, 1997: 133 View in CoL , 134.

MATERIAL EXAMINED. — Holotype: 1 ♀, adult, MAD 89/52 Saint Marie , leg. B.Hauser, MHNG.

OTHER MATERIAL STUDIED. — 3 ♀♀ “Mad.856. Madagascar Centre.Province deTananarive. Forêt de Vanjamanitra (8km au SE d’Anjorzorobe) alt. 1380m, FDHMA avec bambou liane,mousses au sol, 12-V-1967 J-M Betsch Coll.”preserved in 70% ethanol ( MNHN) , 3 ♀♀ “Mad.906. Madagascar nord-est, Province de Tamative. Baie d’Antongil. Ile de Nosy Mangabe , alt 300 m FDHBA, litière, 16-VII-1967 J-M. Betsch Coll.”, preserved in 70% ethanol ( MHNG).

DIAGNOSIS (ADULT FEMALE). — Setation: c 1, c 2 epimeric, genital, adanal, simple; c 1, c 2, largest, rounded tip; in, ro, da, dm, dp, la, lm, lp, h 1, h 2, h 3, p 1, p 2, p 3 lanceolate; in, ro with two medial longitudinal veins; notogastral only one medial longitudinal vein; le lanceolate-dentate; an spiniform. Prodorsum: polyhedral, rounded apically; laterally genal incision present; slightly elevated interlamellar process, complete. Notogastral anterior depression, crossing dorsosejugal furrow, reaching posterior zone of elevated interlamellar process. Low lamellar furrow clearly visible; lamellar apical tip rounded, extending up to le setal insertion. Bothridial opening lateral; bothridial ring smooth with margin not clearly delimited; bothridial tooth present. Sensillus clavate, barbate; appearing similar to toothbrush in lateral view. Superior cornea of naso clearly visible, situated slightly anterior of rostral setal insertion.Tutorium a curving rod-like cuticular thickening anterior and posterior tutorial depression present. Humeral apophysis polyhedral; excavated V-shaped depression present. Notogaster: oval, with prominent polyhedral humeral process; dorsosejugal furrow narrow, rectilinear; notogastral anterior depression ovoid, deep. Fourteen pairs of setae, c 1, c 2 setae inserted on flat slightly elevated region. Circumgastric furrow easily discernible. Lyrifissures: only im, ih, ip clearly visible. Ventral region: thin furrow separating epimera 1, 2, 3; 3 and 4 fused. Epimeral chaetotaxy 3-1-3-3. Discidium triangular, with rounded, expanded apex. Large anterior genital furrow. Four pairs of genital setae. Aggenital setae absent. Three pairs of adanal seta.Two pairs of anal setae; long sharply tipped anal plate. Lyrifissures iad clearly discernible, situated anterior to ad3 setae. Only one rounded depression behind acetabulum IV.

ADULT DESCRIPTION

Measurements

SEM 291 Μm (300-305) × 167 Μm (171-176) (measurements on three specimens). Light microscopy 290 Μm (298-305) ×168 (172-176) (measurements on six specimens).

Shape

Elongate oval ( Figs 1A View FIG , 2A View FIG ).

Colour

S pecimens without cerotegument; dark yellow to brown, clear, slightly shiny,observed in reflected light. Cerotegument

Specimens covered by thin layer ( Figs 1 View FIG A-E; 3 View FIG A, B). SEM observations: faintly rugose to smooth.

Integument

Prodorsal microsculpture: faintly irregular tuberculate: bo, lamella, near insertion ro setae and around CSO; smooth; e.i.p, central zone between l.l.f up to ro setae, CSO surface.

Notogastral microsculpture; undulate.

Lateral microculpture: slightly irregular tuberculate except for Pd I, Pd II and discidum smooth.

Ventral microsculpture; smooth.

Setation

Lanceolate; in, ro, da, dm, dp, la, lm, lp, h 1, h 2, h 3, p 1, p 2, p 3; in and ro with two medial longitudinal veins ( Figs 1 View FIG B-D; 5 View FIG B); notogastral (except c 1, c 2 see below) with one medial longitudinal vein ( Figs 1A View FIG , 5C View FIG ); in largest; da, dm, dp, la, lm, lp, h 1, h 2, largest; p 1, p 2, p 3, h 3 smaller. Lanceolate-dentate; le setae ( Figs 1B, D View FIG ; 5D, F View FIG ), shape and dentitions size, little variation between specimens ( Fig. 1B, D View FIG ). Simple; c 1, c 2, epimeric, genital, aggenital and adanal seta ( Figs 1A View FIG ; 2A, B View FIG ; 3A View FIG ); c 1 and c 2 largest, with rounded tip. Spiniform; anal setae ( Fig. 5E View FIG ).

Prodorsum

Polyhedral, rounded apically ( Figs 1 View FIG A-D; 2 View FIG A). Convex in lateral view ( Figs 3A View FIG ; 4A, B View FIG ); e.i.p slightly elevated, complete ( Figs 3A View FIG ; 4A View FIG ); n.a.d reaching posterior zone of e.i.p.; posterior prodorsal zone depressed ( Figs 1A View FIG ; 2A View FIG ). Three pairs of setae; size in>le>ro; ro setae, inserted slightly antiaxially to medial plane; directed medially and converging; touching each other apically ( Fig. 1A, B, C View FIG ); in setae inserted near l.l.f ( Fig. 1A, B, C, D View FIG ); le setae laterally ( Figs 1B, D View FIG ; 3A View FIG ; 4A View FIG ; 5F View FIG ). Rostral anterior margin rounded; laterally, genal incision (d.ge), rounded, clearly visible ( Figs 1B, D View FIG ; 4B, D View FIG ). Lamellae running dorsolaterally; dorsal furrow (l.l.f) ( Figs 1A, B, C, D View FIG ; 2A View FIG ; 3A View FIG ; 4A, B View FIG ) demarcating inner paraxial margin; l.l.f terminating in the internal zone of conspicuous lamellar apex (la.ti) ( Figs 1B, C View FIG ; 3A View FIG ); in frontal view ( Fig. 4D View FIG ) l.l.f appearing as a slightly darker cuticular thickening, visible on surface as shallow furrow. The la.ti robust, round tipped structure ( Figs 1A, B, C View FIG ; 2A View FIG ; 3A View FIG ). Bothridial opening laterally ( Figs 3A, C View FIG ; 4A View FIG ). Sensillus more or less clavate ( Fig. 3C View FIG ), barbate; posterior zone smooth and anterior zone barbate causing toothbrush-like appearance ( Fig. 3D View FIG ).

Situated slightly in front of ro setae insertions, at the same level, superior cornea of naso (CSO) clearly visible ( Figs 1B, C View FIG ; 4D View FIG ) as smooth rounded structure (dorsal view) and convex (in lateral view). Circumgastric furrow easily discernible, situated between la, lm, lp, h 2, h 1 and h 3, p 1, p 2, p 3 setae ( Figs 2A View FIG ; 3A View FIG ).

Notogaster

Shape; oval, with prominent polyhedral humeral process( Figs 1A View FIG ; 2A View FIG ); in lateral view, anterior clearly depressed and rest convex ( Figs 3A View FIG ; 4A View FIG ); d.sj narrow, rectilinear, hardly discernible; notogastral anterior depression (n.a.d) ovoid, deep, slightly exceeding d.sj extending to e.i.p ( Fig. 3A View FIG ). Middle posterior zone of n.a.d, rectilinear; laterally curving, following the shape of h.ap ( Fig. 2A View FIG ).

Circumgastric furrow (s.c) present, hardly discernible ( Figs 1A View FIG ; 3A View FIG ; 5A View FIG ), almost always covered by cerotegument; without cerotegument, furrow well discernible, situated between la, lm, h 2, h 1 and p 1, p 2, p 3, h 3, setal insertion ( Fig. 2A View FIG ).

Fourteen pairs of setae,(c 1, c 2, da, dm, dp, la, lm, lp, h 1, h 2, h 3, p 1, p 2, p 3); c 1, c 2 extending forward, exceeding d.sj by quite a bit ( Figs 1A View FIG ; 2A View FIG ; 3A View FIG ), inserted on flat little elevated protuberance. Lyrifissures, only im, ih, ip well visible ( Figs 4 View FIG A-C).

Lateral region

Prodorsum; e.i.p slightly elevated. Seta in clearly visible, outwards directed ( Figs 3A View FIG ; 4A View FIG ); Lam easily discernible, terminating in conspicuous la.ti extending to le setae insertion ( Figs 1B View FIG ; 3A View FIG ; 4D View FIG ); tu rod-like curved cuticular thickening ( Fig. 5D View FIG ); s.tu.d deep ( Figs 1B, D View FIG ; 3A View FIG ; 5D View FIG ), pocket depression (a.tu.d) in anterior position, on both sides of tu ( Figs 4B View FIG ; 5D View FIG ); rounded pocket depression posteriorly below tu, (p.tu.d) ( Fig. 5D View FIG ). Anterior; h.ap rounded tip, penetrating posterior bothridial zone ( Figs 1E View FIG ; 3A View FIG ). Excavated V-shaped depression on h.ap clearly visible ( Fig. 3C View FIG , indicated by double arrow). Setae c 1, c 2, easily visible; tips extending slightly posterior to level of insertion of seta in ( Figs 1A View FIG ; 2A View FIG ; 3A View FIG ; 4A View FIG ); small flat elevated protuberance situated posterior c setae; s.c easily discernible ( Figs 1A View FIG ; 3A View FIG ) Lyrifissures hardly discernible; only im, ih clearly visible ( Fig. 4A View FIG ). One depression (dep) discernible posterior leg IV.

Posterior view ( Figs 4C View FIG , 5A View FIG )

Setae; da, dm, dp, la, lm, lp, h 1, h 2 directing medially; p 1, p 2, p 3, h 3, directed posteriorly and ventrally. Furrow of circumgastric depression (s.c) clearly visible. Lyrifissure ip easily discernible between p 2 and p 3.

Ventral region ( Figs 2B View FIG , 3B View FIG )

SEM observation; epimera hardly visible due to presence of cerotegumental layer ( Fig. 3B View FIG ). Optical observation ( Fig. 2B View FIG ); thin furrow separating epimera 1, 2 and 3; 3 and 4 fused; apo 1, apo 2, apo.sj and apo 3 easily discernible. Epimeral chaetotaxy 3-1-3-3. Discidum (dis) triangular, rounded expanded apex. In front of genital plate a.g.f conspicuous furrow, well delimited. Aggenital setae absent; four pairs of genital setae. Three pairs of adanal seta. Two pairs of anal setae; anal plate terminating in long sharp tip ( Fig. 5E View FIG ). Lyrifissures iad easily discernible, situated lateral and anterior ad 3 setae. Only one rounded depression clearly discernible posterior acetabulatum IV.

REMARKS

In this species all elements of the “protection mechanism” are present, as in Bovicarabodes ( Fernandez et al. 2013a) , but the anterior part of h.ap penetrates deeply into the posterior part of bothridium.