Mycolaelaps Lindquist
Creators: name: De Moraes, Gilberto J.
name: Britto, Erika P. J.
name: Mineiro, Jefferson L. De C.
name: Halliday, Bruce
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Mesostigmata
Ascidae
Mycolaelaps

description: Mycolaelaps Lindquist
FEMALE
Gnathosoma. Anterior margin of epistome convex, smooth or with few denticles. Seta h3 longer than h1, in turn longer than pc and h2, which are of similar lengths; insertion of h2 slightly anterior to insertion of h3. Inner palp trochanter seta not elongate. Deutosternum wide, with arched delimiting lateral lines progressively farther apart posteriorly, extending from the first to the fifth most distal transverse lines, posteriorly convergent between fifth and sixth transverse line and often indistinct between sixth and seventh transverse lines; distal four lines usually smooth, although in some specimens sparsely and irregularly denticulate; fifth and sixth rows widened beyond lateral lines, with 15–25 denticles each; seventh row about as wide as fourth row, variously denticulate. Corniculi almost three times as long as their basal widths, with pointed tips, well separated from each other, slightly convergent distally. Palp tarsal apotele two-tined. Fixed cheliceral digit with five coarse teeth occupying most of the internal margin, an offset subapical tooth and an expanded membranous lobe instead of setiform pilus dentilis; with fringed hyaline rim along paraxial face, above base of movable digit; movable digit with three teeth in addition to apical tooth and a ventral mucro near base.
Idiosoma. Elongate. Dorsum: podonotal and opisthonotal shields fused, ornamented, with delineated strip along lateral margins (upon which marginal setae are inserted), without lateral incisions at region of fusion or transverse and nearly straight lines; anterior end of dorsal shield not strongly deflexed. No supernumerary setae on dorsal shield. Podonotal region of shield with 19–21 pairs of setae, including all represented r setae; r3 similar to neighbouring setae; s1, s2 or r2 sometimes symmetrically or asymmetrically absent. Opisthonotal region of shield with 19–20 pairs of setae (J4 sometimes symmetrically absent), including all represented R setae. No setae on unsclerotised lateral cuticle. Dorsal idiosomal setae of similar lengths, much shorter than distance to subsequent setae, acicular and smooth (except J5, usually sparsely barbed and Z5, distinctly longer). Vent er: a pair of presternal platelets present. Sternal shield with three pairs of setae of similar lengths (st1–st3); st2 slightly closer to st3 than to st1; posterior shield margin deeply concave. Third pair of sternal lyrifissures (iv3) and st4 inserted on unsclerotised cuticle. Genital shield not wide enough to include iv5, but including st5; anterior hyaline region broad, convex; posterior region slightly convex to nearly truncate. A pair of elongate metapodal plates. With a sclerotised strip, entire or divided in 3–4 platelets, between genital and ventrianal shields. Elongate, subrectangular ventrianal shield of variable sizes, bearing 1–3 of the six pairs of opisthogastric setae in addition to circumanal setae; para-anal setae inserted at level of mid-length of anal opening, about half as long as post-anal seta. Anal opening not enlarged, about 1/7 of shield length, separated from posterior shield margin. Anterior section of endopodal shield fused with sternal shield; section behind sternal shield corresponding to a large, undulating plate beside coxae III–IV. Exopodal shields extending along coxae II–IV, abutting sternal extension between coxae I–II and posterior end of remnant of endopodal platelet beside inner margin of coxa IV.
Peritreme. Extending from stigma to region between levels of s1 and s2, about as wide as diameter of stigma. Peritrematic shield relatively narrow, fused with dorsal shield immediately posterior to level of s1 and fused through a narrow bridge with exopodal shield beside coxa IV.
Legs. Legs with moderately long pretarsi. Setation of legs I–IV, genu: 12, 7, 6, 6 (or 7); tibia: 9 (or 12), 7, 6 (or 7), 5 (or 6). Leg II not distinctly different from other legs. Leg macrosetae absent. Tarsus I with one middorsoproximal seta and one midventral seta, distinguished by their perpendicular orientation and somewhat greater length and attenuation in comparison with adjacent setae.
Spermathecal apparatus. Not distinct in some species.
MALE
Gnathosoma similar to female, but with corniculi more widely spaced, movable digit with one tooth in addition to apical tooth and reduced ventral mucro near base; spermatodactyl about as long as movable digit, directed forward at the base, slightly curved downward and slightly tapered distally. Dorsal shield with ornamentation similar to female, but marginal rim not clearly delineated and dorsal shield broader, including marginal lyrifissure (idR3, Rp) and Zv5. Shape of dorsal setae similar to female. With a pair of presternal platelets. Sternogenital shield with five pairs of setae (st1–st5) and three pairs of lyrifissures (iv1–iv3); posterior margin slightly concave; not fused with ventrianal or peritrematic shields. Endopodal shield totally fused with sternogenital shield. No discrete metapodal plates. Ventrianal shield about pentagonal, with posterior extension truncate, bearing 3–4 pairs of opisthogastric setae in addition to circumanal setae; including metapodal shields; not fused with other shields. With a pair of opisthogastric setae (Jv5) on unsclerotised cuticle. Exopodal shield a continuous strip along coxae II–IV. Peritrematic shield narrowly fused with exopodal shield beside coxa IV and extending along its posterior margin. Setation of leg II slightly different from female, with ventriapical setae of tarsus stouter and most setae of genu, tibia, and tarsus shorter than in female.
description: Published as part of De Moraes, Gilberto J., Britto, Erika P. J., Mineiro, Jefferson L. De C. & Halliday, Bruce, 2016, Catalogue of the mite families Ascidae Voigts & Oudemans, Blattisociidae Garman and Melicharidae Hirschmann (Acari: Mesostigmata), pp. 1-299 in Zootaxa 4112 (1) on pages 48-49, DOI: 10.11646/zootaxa.4112.1.1, http://zenodo.org/record/399477