Cosmolaelaps pampaensis, Duarte, Adriane Da Fonseca, Moreira, Grazielle Furtado, Cunha, Uemerson Silva Da & Moraes, Gilberto José De, 2017

Duarte, Adriane Da Fonseca, Moreira, Grazielle Furtado, Cunha, Uemerson Silva Da & Moraes, Gilberto José De, 2017, Cosmolaelaps Berlese (Mesostigmata: Laelapidae) from southern Brazil, with a new record of a heteromorphic male, description of a new species, and a key to the species reported from that country, Zootaxa 4286 (4), pp. 535-544 : 538-543

Cosmolaelaps pampaensis n. sp.

Types specimens. Holotype female and four paratype females, ColleCted by A. da F. Duarte on 5 MarCh and 26 June 2012, 16 April 2013 and two paratype males ColleCted on 5 MarCh and 26 June 2012 from soil at ACeguá, Rio Grande do Sul state, Brazil, deposited at ESALQ-USP. Five paratype females ColleCted on 26 June 2012 and 16 April 2013 and one paratype male ColleCted on 16 April 2013, deposited at UNIVATES.

Diagnosis. Female dorsal shield retiCulate, with 39 pairs of setae and two unpaired setae, all spatulatemuCronate and with a disCernible basal asymmetriC protuberanCe, exCept z1 and Z5, setiform. UnsClerotised lateroventral CutiCle with eight pairs of stout and setiform setae. Sternal shield lightly sClerotised, with indistinCt anterior margin. Genital shield bearing only st5. Three pairs of metapodal plates. Ten pairs of opisthogastriC setae (Jv1–Jv5; Zv1–Zv5). Epistome Convex, with anterior margin bearing dentiCles of similar sizes, medially trunCate to slightly depressed. Fixed CheliCeral digit with six teeth. TroChanter and femur of leg IV and femur of leg II with stout, trunCate, short and distally enlarged setae.

Female. Dorsal idiosoma ( Fig. 6 ): Dorsal shield 388 (375–405) long and 242 (230–256) wide (at level of r6), retiCulate, with 39 pairs of setae, inCluding two pairs of extra setae, [j1–j6, z1–z6, s1–s6, r2–r5 on podonotal region of dorsal shield; J1–J5, Z1–Z5, S1–S5, px2 (posterolaterad of J2) and px3 (posterolaterad of J3) on opisthonotal region of dorsal shield] and two unpaired setae, Jx 2 in transverse line with J2, and Jx3 between J3 and J4, on opisthonotal region of dorsal shield. All setae spatulate-muCronate, usually with a disCernible basal protuberanCe, exCept z1 and Z5, setiform. Dorsal shield with 17 and six pairs of distinguishable lyrifissures and pores, respeCtively. UnsClerotised lateroventral CutiCle with eight pairs of stout setae (r6, R1, R2, R4–R6, two UR setae), all setiform. Measurements of setae: j1 19 (18–20), j2 3 2 (30–35), j3 33 (28–39), j4 34 (31–40), j5 36 (32–42), j6 36 (33–41), z1 14 (12–16), z2 35 (32–41), z3 34 (30–39), z4 34 (30–42), z5 36 (31–42), z6 37 (33–42), s 1 28 (24– 32), s2 31 (28–34), s3 33 (29–43), s4 36 (32–42), s5 38 (33–44), s6 34 (30–40), r2 26 (22– 30), r3 29 (25–35), r4 34 (30–40), r5 31 (28–35), r6 19 (16–21), J1 37 (33–42), J2 37 (33–42), J3 34 (28–44), J4 34 (30–40), J5 27 (23– 38), Jx1 36 (32–43), Jx2 33 (30–38), Z1 38 (32–45), Z2 35 (33–41), Z3 35 (30–44), Z4 33 (30–38), Z5 14 (13–15), S1 34 (28–41), S2 33 (29–40), S3 33 (28–41), S4 30 (27–37), S5 27 (24–30), px1 33 (26–42), px2 37 (33–42), UR1 16 (12–19), UR2 15 (12–17).

Peritreme ( Fig. 7 ): PeritrematiC shield only fused with dorsal shield, near z1, with two pairs of lyrifissures and a pair of pores 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. 8 ): Sternal shield lightly sClerotised, smooth, with indistinCt anterior margin, about as long as wide, with three pairs of setae (st1–st3) and two pairs of lyrifissures (iv1, iv2); posterior margin Convex; distanCes between st1 and posterior margin of sternal shield 88 (82–91), st1–st1 58 (45–62), st2–st2 79 (72–90), st3–st3 101 (90–121). Seta st4 on unsClerotised, unstriated CutiCle, posterolaterad of iv3, also on CutiCle. Genital shield not fused with anal shield, flask-shaped, lightly retiCulate behind st5 [length 191 (184–197), width 81 (77– 87)], with a pair of setae (st5); distanCe st5–st5 73 (69–80). Genital lyrifissure (iv5) on unsClerotised CutiCle, posterolaterad of st 5. with pair of anteriad minute, rod-shaped platelets next to edge or (oCCasionally) fused with genital shield, posteriad of iv 5. with three pairs of metapodal plates, progressively larger from the Closest to the farthest from genital shield. Anterior seCtion of endopodal shield fused with sternal shield; seCtion behind sternal shield fragmented into a boomerang-shaped seCtion between Coxae III and IV. Exopodal shield represented by an arChed fragment partially surrounding external margin of Coxa IV. Anal shield subtriangular, wider anteriorly [66 (58–70) long and 63 (59–67) wide], with slight striation and with a pair of marginal pores about in transverse line with posterior margin of anal opening. with 10 pairs of setiform opisthogastriC setae: Jv1–Jv5, Zv1–Zv5. All ventral setae setiform; gv2 distinCt. Measurements of setae: st1 34 (29–40), st2 33 (27–38), st3 34 (26–41), st4 31 (25–35), st5 27 (23–30), Jv1 24 (21–30), Jv2 22 (20–26), Jv3 20 (19–22), Jv4 18 (16–20), J v5 19 (17–22), Zv1 22 (21–24), Zv2 23 (21–25), Zv3 17 (16–20), Zv4 19 (18–21), Zv5 17 (16–20).

Spermatheca ( Fig. 9 ): Distinguishable, laelapid type; insemination pores between Coxae III and IV; infundibulum of slightly larger diameter than tubulus; the latter about 120 long; ramus of variable shape, aCCording to position, seemingly more sClerotised than tubulus.

Gnathosoma ( Figs 10–12 ): Epistome Convex, with anterior margin bearing dentiCles of similar sizes, medially trunCate to slightly depressed ( Fig. 10 ). Deutosternum with a smooth, transverse distal line follow by 6 transverse lines of 6–13 dentiCles eaCh ( Fig. 11 ). CorniCuli parallel to eaCh other, 19 (18–20) long and 8 (6–10) wide basally, almost reaChing middle of palp femur. Hypostomal setae h2 laterad and slightly anteriad of h3. Palp length 104 (98–108), apotele 2-tined; inner palp troChanter seta about 1.5 times as long as outer seta. CheliCeral digits of similar lengths ( Fig. 12 ); movable digit 32 (30–32), with two teeth in addition to distal tooth; fixed digit 28 (26– 33), with six teeth in addition to distal tooth, a subterminal paraxial notCh and setiform pilus dentilis. Stout and tapering dorsal CheliCeral seta and antiaxial lyrifissures distinguishable.

Legs: Lengths, not inCluding ambulaCra – I, 391 (363–410); II, 309 (286–337); III, 283 (270–295); IV, 412 (398–420); Chaetotaxy: I, Coxa 0, 0/2, 0/0, 0, troChanter 1, 1/2, 0/1, 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 1, 1/1, 0/1, 1, 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. MaCrosetae absent; ad of troChanter IV, ad1 and ad2 of femur IV ( Fig. 13 ) and ad1 of femur II and III, pd2 of femur II stout, trunCate, short and distally expanded.

Male ( Figures 2–5 , 14–15 )

Dorsal idiosoma: Dorsal shield [352 (280–372) long and 228 (200–232) wide (at level of r6)], similar to female in retiCulation and setation. Dorsal setae length about 90% as long as those of female. UnsClerotised lateral CutiCle with eight pairs of setae (r6, R1, R2, R4–R6). Measurements of setae: j1 14 (13–15), j2 31 (23–34), j3 33 (25–35), j4 34 (25–38), j5 31 (27–37), j6 32 (25–40), z1 8, z2 31 (26–35), z3 29 (25–36), z4 3 3 (25–36), z5 31 (25– 35), z6 30 (26–32), s1 25 (22–28), s2 29 (26–30), s3 32 (26–34), s4 34 (27–35), s5 31 (28–35), s6 31 (25–33), r2 24 (21–27) r3 28 (25–33), r4 32 (25–34), r5 27 (23–33), r6 12 (10–15), J1 32 (26–35), J2 30 (26–35), J3 31 (27–36), J4 29 (23–35), J5 23 (15–28), Jx1 30 (27–35), Jx2 31 (26–37), Z1 32 (26–39), Z2 34 (25–38), Z3 32 (25–37), Z4 30 (27–36), Z5 15 (10–20), S1 30 (24–36), S2 33 (25–37), S3 31 (23–34), S4 28 (20–30), S5 25 (20–26), px1 27 (26– 34), px2 32 (25–37), R1 14 (10–16), R2 12 (10–13), R4 13 (12–14), R5 12 (11–14), UR1 11 (11–11).

Peritreme. As in female.

Ventral idiosoma ( Fig. 2 ): Holoventral shield [290 (265–318) long and 155 (152–175) wide (behind Coxae IV)], holoventral setae about 70% as long as those of female, with ten pairs of setae (st1–st5, Jv1–Jv3, Zv1 and Zv2) in addition to CirCumanal setae, five pairs of distinguishable lyrifissures and a pair of marginal pores about in transverse line with anterior margin of anal opening, ventrianal region retiCulate; a pair of ellipsoidal metapodal plates. UnsClerotised CutiCle posterolaterad of ventrianal region of holoventral shield with three pairs of setae (Jv4, Jv5 and Zv3) and three pairs of distinguishable lyrifissures; gv2 distinCt. Measurements of setae: st1 21 (21–26), st2 21 (17–22), st3 20 (18–20), st4 15 (13–19), st5 19 (16–19), Jv1 17 (15–17), Jv2 16 (15–18), Jv3 19 (15–19), Z v1 13 (11–14), Z v2 21 (18–22), Zv3 14 (10–16), Zv4 12 (10–14) and Zv5 12 (11–14). with a pair of rounded, apparently slightly elevated proCesses mesad of st4 and a larger rounded, also apparently slightly elevated proCess posteromesad of st5 ( Figs 2 , 14, 15 ).

Gnathosoma. Epistome, deutosternum and CorniCuli similar to those of female. CheliCeral digits of similar lengths ( Fig. 3 ); movable digit 30 (24–30), with one tooth in addition to distal tooth; spermatodaCtyl 39 (37–40); fixed digit 27 (24–28), with four teeth in addition to distal tooth and setiform pilus dentilis. Dorsal CheliCeral seta stout and tapering; antiaxial lyrifissures distinguishable.

Legs. As in female, exCept seta av of the genu and tibia III, and av of the genu IV, thorn-like ( Figs 4, 5 ).

Etymology. The speCifiC name pampaensis refers to the biome (Pampa) from whiCh the type speCimens were ColleCted.

Remarks. Regarding the shape of the dorsal setae, Cosmolaelaps pampaensis is Closely related to C. chini Bai & Gu, 1993 , C. liae Bai & Gu, 1993 , C. michaeli (Huhta & Karg, 2010) and C. paravacua Nasr & Nawar, 1989 . C. liae and C. paravacua differs by C. pampaensis and other mentioned speCies above by having distinCt anterior margin of sternal shield. Cosmolaelaps chini has Z5 sCimitar-shaped, j1 leaf-shaped and smooth genital shield. Cosmolaelaps michaeli has Z5 sCimitar-shaped, dorsal setae with the same length (in C. pampaensis J5 is twiCe as long as Z5) and anterior ends of peritreme in front of s1 (in C. pampaensis the anterior ends of peritreme is in front of z1).

This paper reports Cosmolaelaps speCies for the first time in the Pampa biome in Brazil. InCluding the new speCies here desCribed, 13 Cosmolaelaps speCies have been reported from this Country.

Figures

FIGURES 6 – 13. Cosmolaelaps pampaensis, female. 6. dorsal idiosoma; 7. peritreme; 8. ventral idiosoma; 9. spermatheca; 10. epistome; 11. hypostome; 12. chelicera; 13. leg IV.

FIGURES 1 – 5. 1. Cosmolaelaps guttulatus, heteromorphic male; ventral idiosoma. 2. C. pampaensis, male, ventral idiosoma; 3. C. pampaensis, male, chelicera; 4. C. pampaensis, male, leg III; 5. C. pampaensis, male, leg IV.

FIGURES 14 – 15. Cosmolaelaps pampaensis, male, sternogenitoventral shield showing rounded processes.