Prasadiseius cocytes (Prasad, 1970)

Prasad, V., 2011, Redescription Of Adults Of Prasadiseius Cocytes (Prasad, 1970) (Acari: Otopheidomenidae), Acarologia 51 (2), pp. 165-189 : 183

publication ID	https://doi.org/ 10.1051/acarologia/20112002
DOI	https://doi.org/10.5281/zenodo.5476630
persistent identifier	https://treatment.plazi.org/id/8E1FC21E-7C78-FFF8-DDB2-0D29FD2634E4
treatment provided by	Marcus
scientific name	Prasadiseius cocytes (Prasad, 1970)
status

Treatment

( Figs. 1-35 View FIGURE View FIGURE View FIGURE View FIGURE View FIGURE View FIGURE View FIGURE View FIGURE View FIGURE View FIGURE View FIGURE View FIGURE View FIGURE View FIGURE View FIGURE View FIGURE View FIGURE View FIGURE View FIGURE View FIGURE View FIGURE View FIGURE View FIGURE View FIGURE View FIGURE View FIGURE View FIGURE View FIGURE View FIGURE View FIGURE View FIGURE View FIGURE View FIGURE View FIGURE View FIGURE )

Otopheidomenis cocytes Prasad, 1970a: 29 . Prasadiseius cocytes (Prasad) , Wainstein, 1972: 453.

FIGURE 1: Prasadiseius cocytes (Female) — Anterior idiosoma showing peritremes (PE), setae r3 on the lateral integument, anterior dorsal shield (DS) showing entire podonotal shield (POS), anterior opisthonotal shield (OPS), left (LLINV) and right lateral invaginations (RLINV), muscle marks (MM), and setae j3, j4, j5, j6, z2, z3, z5, s4 (200x, VP10-36: 126).

FIGURE 2: Prasadiseius cocytes (Female) — Posterior idiosoma showing posterior podonotal shield (POS), entire opisthonotal shield (OPS), left (LLINV) and right lateral invaginations (RLINV), posteromedial concavity (PMCONC) in the opisthonotal shield, muscle marks (MM), and setae J2, J5, Z5 (200x, VP10-36: 146).

FIGURE 3: Prasadiseius cocytes (Female) — Anterior dorsal shield (DS) showing anteromedial podonotal shield (POS) with anteromedial (AMCONC) and anterolateral concavities (ALCONC), muscle marks (MM), and setae j3, j4, j5, z2, z3 in higher magnification (400x, VP10-36: 57).

FIGURE 4: Prasadiseius cocytes (Female) — Anteromedial dorsal shield (DS) showing podonotal shield (POS), muscle marks (MM) and setae j3, j4, j5, z2, z3, z5. Note setae z2 and z3 comparatively larger than tiny setae j3, j4, and j5. Scale-like and hexagonal reticulation patterns are clearly seen on the shield (400x, VP10-36: 59).

FIGURE 5: Prasadiseius cocytes (Female) — Anteromedial dorsal shield (DS) showing mid podonotal shield (POS), muscle marks (MM) and setae z5, j6 (400x, VP10-36: 62).

FIGURE 6: Prasadiseius cocytes (Female) — Anteromediolateral dorsal shield (DS) showing mid posterior podonotal shield (POS), lateral concavities (LCONC, see arrow), muscle marks (MM) and setae j4, j5, s4, z3, z5 on the podonotal shield and r3 on the soft integument beside this shield. Note seta s4 larger than j5 but similar to z3 and r3 much larger than s4 (400x, VP10-36: 64).

FIGURE 7: Prasadiseius cocytes (Female) — Right mediolateral dorsal shield showing right posterior podonotal shield (POS), right anterior opisthonotal shield (OPS), right lateral invagination (RLINV), muscle marks (MM), and setae j6 on the podonotal shield and J2 on the opisthonotal shield (400x, VP10-36: 67).

FIGURE 8: Prasadiseius cocytes (Female) — Posteromedial dorsal shield showing mid posterior opisthonotal shield (OPS) with posteromedial concavity (PMCONC), muscle marks (MM), setae J2, J5, Z5 on the opisthonotal shield (400x, VP10-36: 63).

FIGURE 9: Prasadiseius cocytes (Female) — Shield-shaped sternal shield (SS) in between left (LCII) and right coxa II (RCII) and left (LCIII) and right coxa III (RCIII), with 3 pairs of sternal setae (ST1 – ST3) on it. Note distance between ST2 – ST2 much larger than ST1 – ST1 or ST3 – ST3. Also, note vertical distance between ST2-ST3 on each side much shorter than ST1 – ST2. Measurement of vertical distance between ST1 – ST3 and diagonal distance between ST1 – ST3 are also of diagnostic use (400x, VP10-36: 103).

FIGURE 10: Prasadiseius cocytes (Female) — Genital shield (GS) with 1 pair of genital setae (ST5) on the integument. Note roughly truncate posterior margin with a short middle convexity and two short concavities beside the middle convexity — see arrows (400x, VP10-36: 75).

FIGURE 11: Prasadiseius cocytes (Female) — Posterior opisthosoma (OP) showing 1 pair of ventral setae (JV1), anal shield (AS), and paraanal setae (PA). Note anteromedial elongation (arrow) of anal shield (400x, VP10-36: 124).

FIGURE 12: Prasadiseius cocytes (Female) — Posterior opisthosoma (OP) showing anal shield (AS), paraanal setae (PA), and membranous anal volvular or lobular projections (MAV). Two lateral and one posterior anal valves are not visible (400x, VP10-36: 89).

FIGURE 13: Prasadiseius cocytes (Female) — Midventral opisthosoma (OP) showing tubular spermatheca (SPER) (400x, VP10-36: 101).

FIGURE 14: Prasadiseius cocytes (Female) — Ventrolateral opisthosoma (OP) showing tubular spermatheca (SPER) entering in left coxa (LCIII) (400x, VP10-36: 142).

FIGURE 15: Prasadiseius cocytes (Female) — Dorsal gnathosoma showing palps and the tectum (TE), which is rounded anteromedially (400x, VP10-36: 113).

FIGURE 16: Prasadiseius cocytes (Female) — Reduced fixed digit of chelicera (FDCH) and elongated movable digit of chelicera (MDCH) with denticles (DE) (400x, VP10-36: 127).

FIGURE 17: Prasadiseius cocytes (Male) — Anterior dorsal shield (DS) showing mid anterior podonotal shield (POS), muscle marks (MM), and setae j3, j4, j5, z2, z3 on the podonotal shield in high magnification. Note setae z2 much larger than j3, j4 or j5 (note j4 absent on right side) (400x, VP10-36: 164).

FIGURE 18: Prasadiseius cocytes (Male) — Anteromedial dorsal shield (DS) showing mid podonotal shield (POS), muscle marks (MM) and setae j5, j6, z3, z5, s4 on the podonotal shield in high magnification. Note s4 larger than j5, j6 or z5 (400x, VP10-36: 166).

FIGURE 19: Prasadiseius cocytes (Male) — Posterior idiosoma showing posteromedial opisthonotal shield (OPS) with posteromedial concavity (PMCONC), muscle marks (MM), and setae J5 and Z5. Note that serrations of Z5 are not clearly evident in this magnification (400x, VP10-36: 165).

FIGURE 20: Prasadiseius cocytes (Male) — Short peritremes (PE) in between and lateral to legs III-IV (400x, VP10-36: 168).

FIGURE 21: Prasadiseius cocytes (Male) — Anterior sternogenital shield (SGS) in between left (LCII) and right coxae III (RCIII) showing setae ST1, ST2, and ST3. Note distance between ST3 – ST3 much shorter than ST1 – ST1 or ST2 – ST2 (400x, VP10-38: 42).

FIGURE 22: Prasadiseius cocytes (Male) — Posterior sternogenital shield (SGS) in between left (LCIII-LCIV) and right coxae III – IV (RCIII – RCIV) showing posteromedial concavity (PMCONC) and setae ST3 and ST5 on it. Note distance between ST5 – ST5 larger than ST3 – ST3 (400x, VP10-38: 43).

FIGURE 23: Prasadiseius cocytes (Male) — Posterior opisthosoma (OP) showing 1 pair of ventral setae (JV1), anal shield (AS) rounded anteriorly, and paraanal (PA) setae (400x, VP10-36: 178).

FIGURE 24: Prasadiseius cocytes (Male) — Posterior opisthosoma showing anal shield (AS), paraanal setae (PA), barely visible postanal seta (PST), and cribriform pattern (CRI) (400x, VP10-36: 163).

FIGURE 25: Prasadiseius cocytes (Male) — Left leg I (LLI) and left leg II (LLII) in ventral view showing left coxa II (LCOII), left trochanter II (LTRII), left femur II (LFEII), left genu II (LGEII), and bi-furcate twin setae (TSE) on ventral hump or spur (SPU) of left basifemur II. A short, thick, spinose, ventral seta (SPI) is seen distal to spur on telofemur I and II (400x, VP10-36: 169).

FIGURE 26: Prasadiseius cocytes (Male) — Left chelicera (LCH) and right chelicera (RCH) showing reduced fixed (FDCH) and elongate movable digit (MDCH) with spermatodactyl (SPERM) (400x, VP10-36: 174).

FIGURE 27: Prasadiseius cocytes (Female) — Right anterolateral dorsal shield and idiosoma showing right lateral podonotal shield (POS) with seta r3 and anterior part of peritreme (PE). Note that seta r5 is also present on soft integument medial and slightly posterior to the peritreme (PE) (400x, VP10-36: 66).

FIGURE 28: Prasadiseius cocytes (Female) — Right mediolateral dorsal shield and idiosoma showing posterior part of peritreme (PE), right lateral podonotal shield (POS), and part of right anterior opisthonotal shield (OPS) and right lateral invagination (RLINV) in between the two shields. Note that seta r5 is present on soft integument medial and posterior to the peritreme (PE) (400x, VP10-36: 68).

FIGURE 29: Prasadiseius cocytes (Female) — Anteromedial podonotal shield (POS) showing muscle marks (MM) and setae j3, j4, j5, z2, z3 in high magnification. Note that j4 on right is missing (400x, VP10-36: 106).

FIGURE 30: Prasadiseius cocytes (Female) — Sternal shield (SS) in between left and right coxae II (LCII-RCII) and coxae III (LCIII-RCIII) with setae ST2 and ST3. Note that both setae ST1 and one ST2 are missing (400x, VP10-36: 92).

FIGURE 31: Prasadiseius cocytes (Female) — Ventral opisthosoma (OP) with setae JV1 and genital shield (GS) with genital seta (ST5). Note that one ST5 is present on soft integument beside the shield while other is missing. Genital shield is truncate with rounded corners. Compare with Fig. 10 of female in which both ST5 are present beside the genital shield on the soft integument. Note also in Fig. 22 of male in which ST5 are present on sternogenital shield (400x, VP10-36: 130).

FIGURE 32: Prasadiseius cocytes (Female) — Posterior opisthosoma showing anal shield (AS), paraanal setae (PA), pair of anterior anal valves (AAV) and excreta (EXC). The triangular posterior anal valve in between AAV is lightly visible. Note extended and narrow anteromedial margin of anal shield (400x, VP10-36: 143).

FIGURE 33: Prasadiseius cocytes (Female) — Podonotal shield (POS) in 6 females showing variation in presence and location of setae j3, j4, j5, z2, and z3 (see discussion) (VP10-36, VP10-38).

FIGURE 34: Prasadiseius cocytes (Female) — Shield-shaped sternal shield in a paratype female in between left and right coxae II-III (LCII-RCII, LCIII-RCIII) showing normal 3 pairs of setae on it (VP69-101).

FIGURE 35: Prasadiseius cocytes (Male) — Posterior part of sternogenital shield (SGS) in between left and right coxae IV (LCIV – RCIV) showing absence of ST5 (VP10-36: 177).

Copyright notice

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.

Taxonomy

Kingdom	Animalia
Phylum	Arthropoda
Class	Arachnida
Order	Mesostigmata
Family	Otopheidomenidae
SubFamily	Otopheidomeninae
Genus	Prasadiseius