Cosmolaelaps jaboticabalensis, Moreira, Grazielle Furtado, Klompen, Hans & Moraes, Gilberto José De, 2014

Moreira, Grazielle Furtado, Klompen, Hans & Moraes, Gilberto José De, 2014, Redefinition of Cosmolaelaps Berlese (Acari: Laelapidae) and description of five new species from Brazil, Zootaxa 3764 (3), pp. 317-346 : 336-338

Cosmolaelaps jaboticabalensis n. sp.

Material examined: holotype female and 22 paratype females from a laboratory colony initiated with specimens collected on 4 December 2011 by G.F. Moreira from litter under Eriobotrya japonica (Thunb.) (Rosaceae) at Jaboticabal, São Paulo state, Brazil; holotype, 19 paratype females deposited at ESALQ-USP; other type specimens deposited at OSAL. Other specimens examined: two females collected on 21 March 1978 by D. E.

Johnston from piled leaf litter, Piracicaba, São Paulo, Brazil ( OSAL 0 0 9556, 009571); one female collected on 24 March 1978 by D. E. Johnston from piled grass clippings, Piracicaba ( OSAL 009587).

Diagnosis: Female dorsal shield reticulate, with 39 pairs of setae and two unpaired setae, all scimitar-shaped, except j1 and z1, setiform, and Z5, spatulate. Unsclerotised lateroventral cuticle with nine pairs of scimitar-shaped setae. Base of the two anterior lobes of the sternal shield much less sclerotised than remainder of the shield, delineating two presternal plates. Genital shield bearing only st5. Two pairs of elongate metapodal plates. Nine pairs of opisthogastric setae (Jv1–Jv5; Zv1, Zv2, Zv4 and Zv5). Epistome convex, with anterior margin bearing denticles of similar sizes, except median denticle, distinctly more elongate. Fixed cheliceral digit with ten teeth.

Female ( Figure 6 A–F)

Dorsal idiosoma ( Fig. 6 A): dorsal shield 551 (505–590) long and 350 (334–368) wide (at level of r6), reticulate, with 39 pairs of setae, including two pairs of extra setae, and two unpaired setae [j1–j6, z1–z6, s1–s6, r2– r5 on podonotal region of dorsal shield, and J1–J5, Z1–Z5, S1–S5, px2 and px3 (between J and Z series) and unpaired Jx setae (in transverse line with J2 and between J3 and J4 respectively) on opisthonotal region of dorsal shield]. All setae scimitar-shaped, except j1 and z1, setiform, and Z5 spatulate. Length of setae shown in Table 1 . Dorsal shield with 17 and six pairs of distinguishable lyrifissures and pores respectively. Unsclerotised lateral cuticle with nine pairs of setae (r6, R1, R2, R4–R6, three UR setae), scimitar-shaped.

Peritreme ( Fig. 6 F): peritrematic shield only fused to dorsal shield near z1, with pair of lyrifissures and a pore behind each stigma, with a pore and a lyrifissure dorsad of peritreme and between coxae II and III. Peritreme extending anteriorly to level of z1.

Ventral idiosoma ( Fig. 6 B): base of the two anterior lobes of sternal shield much less sclerotised than remaining of the shield, delineating two presternal plates. Sternal shield about as long as wide, reticulate, with three pairs of setae (st1–st3) and two pairs of lyrifissures (iv1, iv2); posterior margin concave; distances between st1 and the posterior margin of sternal shield 110 (104–114), st1–st1 65 (61–67), st2–st2 86 (83–88), st3–st3 103 (100– 105). Lengths of setae shown in Table 2 . Seta st4 on unsclerotised, unstriated cuticle, posterolaterad of iv3 also on cuticle. Genital shield not fused with anal shield, flask-shaped, reticulate [length 225 (218–230), width 98 (96– 101)], with a pair of setae (st5); distance st5–st5 82 (77–87). Genital lyrifissure (iv5) on unsclerotised cuticle, posterolaterad of st5. With a pair of rod-shaped platelets next to edge of genital shield, posteriad of iv 5, and a pair of minute roundish to elongate plates laterad to them. Two pairs of elongate metapodal plates, the anterior smaller. Anterior section of endopodal shield fused with sternal shield, often with anterior end distinctly prolonged between coxae II and III; posterior section often corresponding to a boomerang-shaped fragment between coxae III and IV. Exopodal shield represented by a tri-radiate fragment between coxae I and II and an arched fragment partially surrounding external and posterior margin of coxa IV. Anal shield pear-shaped (wider section anterior), reticulate [93 (88–97) long and 70 (64–73) wide], with a pair of marginal pores about in transverse line with anterior margin of para-anal seta. With nine pair of opisthogastric setae: Jv1 –Jv5, Zv1, Zv2, Zv4 and Zv5. Ventral idiosomal setae setiform, except Jv4, Jv5, Zv5 and post-anal, spatulate; gv2 distinct.

Gnathosoma: epistome convex, with anterior margin bearing denticles of similar sizes, except median denticle, distinctly more elongate ( Fig. 6 D). Deutosternum with a smooth, transverse distal line followed by six transverse lines with 15–24 denticles each ( Fig. 6 C). Corniculi parallel to each other, 41 (39–43) long and 9 (8–9) wide basally, almost reaching middle of palp femur. Internal malae adjacent to each other and ventrally fimbriate, laterad by a pair of curved structures with internal surface and distal end coarsely frimbiate. Length of setae on venter of gnathosoma shown in Table 2 . Hypostomal setae h2 laterad and slightly anteriad of h3. Palp length 149 (142–157), apotele 2-tined; inner palp trochanter seta about 1.8 times as long as outer seta. Cheliceral digits of similar lengths ( Fig. 6 E); movable cheliceral digit 51 (49–53) with two or three teeth in addition to distal tooth; fixed digit 56 (50–60) with 10 teeth in addition to apical tooth, the most basal of which and the one closest to tiny setiform pilus dentilis distinctly larger than others. Stout and tapering dorsal cheliceral seta and dorsal and antiaxial lyrifissures distinguishable. Cheliceral arthrodial process as a coronet-like fringe.

Legs: lengths, not including ambulacra—I, 597 (584–623); II, 426 (403–456); III, 400 (385–438); IV, 605 (585–635); chaetotaxy: I—coxa 0-0/2, 0/0-0, trochanter 1-0/1, 1/2-1, femur 2-2/1, 3/3-2, genu 2-3/2, 3/1-2, tibia 2-3/2, 3/1-2; II-coxa 0- 0/1, 0/1-0, trochanter 1-0/1, 1/1-1, femur 2-3/1, 2/2-1, genu 2-3/1, 2/1-2, tibia 2-2/1, 2/1-2; III-coxa 0-0/1, 0/1-0, trochanter 1-1/1, 0/1-1, femur 1-2/1, 1/0-1, genu 2-2/1, 2/1-1, tibia 2-1/1, 2/1-1; IV-coxa 0-0/1, 0/0-0, trochanter 2-1/1, 0/1-0, femur 1- 2/1, 1/0-1, genu 2-2/1, 3/0-1, tibia 2-1/1, 3/1-2; tarsi II–IV: 18 setae each. Pre-tarsi with short claws, pulvillus distally rounded. Setae uniform in shape, no macrosetae; femur IV with ad1 and ad2 stout, the former spatulate.

Male: Unknown.

Etymology. The name jaboticabalensis refers to the place where the holotype specimen was collected, Jaboticabal, São Paulo state.

Remarks. Cosmolaelaps jaboticabalensis is closely related to C. mediocuspis (Karg) and C. weeversi (Oudemans) , described from Ecuador and Rio de Janeiro, Brazil respectively. These species have most setae scimitar-shaped and some setae spatulate on the dorsal shield and the surrounding unsclerotised membrane. They differ from C. jaboticabalensis by having only 37 pairs of setae on dorsal shield. In addition, C. mediocuspis differs by having three unpaired setae on the dorsal shield and epistome acuminate, while C. weeversi differs by having Z5 scimitar-shaped, similar to most other dorsal shield setae, and st 4 inserted on a fragment of the endopodal plate between coxae III–IV.

Figures

FIGURE 6. Cosmolaelaps jaboticabalensis. Female. A. Dorsal idiosoma; B. Ventral idiosoma; C. Ventral gnathosoma; D. Epistome; E. Chelicera; F. Peritreme.