Lasioseius jorgeamadoi Santos & Argolo, 2018

AraújoK, Edineia da S., StracieriK, Juliana, de MoraesK, Gilberto J. & OliveiraK, Anibal R., 2024, Description of the male of Lasioseius jorgeamadoi Santos & Argolo, 2018 (Acari: Blattisociidae), Acarologia 2018 (4), pp. 1100-1105 : 1101-1104

Lasioseius jorgeamadoi Santos & Argolo, 2018

Adult male description ( Figs. 1–3 ) (n=7 measured)

Gnathosoma ( Figures 1A and 3A ) — Fixed cheliceral digit 26 (25–27) long, with 8 (7–8) not retrorse pointed teeth in addition to the apical hook and a round, antiaxial projection at pilus dentilis level; movable cheliceral digit 30 (30–31) long, with one retrorse pointed tooth in addition to apical hook; antiaxial and dorsal lyrifissures distinct. Spermatodactyl 61 (59–63) long, L-shaped; shaft 41 (39–43) long, almost straight, basally thicker; foot 20 long, at small angle with the shaft axis, rounded and curved downward apically. Deutosternum with the first five transverse denticulate lines each with 4–8 denticles and the last two each with 5–11 denticles. Corniculi 22 (17–23) long and 10 (9–10) wide basally, spaced 32 (30–35) apart proximally. Measurements of setae: h1 16, h2 21 (20–23), h3 41 (40–42), pc 30 (29–30).

Dorsal idiosoma ( Figures 1B and 2A ) — Dorsal shield densely covered with cerotegument, strongly ornamented with roundish structures centrally, combined with curved lines laterally anteriad of z6 and scant broken and curved lines behind, 340 (330–350) long and 215 (210–220) wide at widest level. With seven pairs of dorsal gland openings gd (1, gd2, gd4, gd5, gd6, gd8, gd9) and16 pairs of lyrifissures (Rp on unsclerotized lateral cuticle). Seta r3 inserted on dorsal shield and R1 usually inserted on dorsal shield (one member of each pair on unsclerotized lateral cuticle in two males); other setae of the R -series (R2–R5) absent. Setal measurements:

j1 26 (25–27), j2 10 (9–11), j3 24 (23–25), j4 11 (11–13), j5 11 (11–12), j6 13 (13–14), J1

11 (10–11), J2 10 (10–11), J3 10, J4 10, J5 11 (10–11), z1 12 (11–13), z2 15 (15–16), z3 24 (23–25), z4 20, z5 10 (8–10), z6 9 (9–10), Z1 16 (15–17), Z2 12, Z3 19 (18–20), Z4 39 (36–40),

Z5 69 (68–70), s1 6 (5–6), s2 6 (5–6), s3 27 (26–29), s4 28 (27–28), s5 26 (25–27), s6 31 (30–32), S1 22 (22–23), S2 22 (21–22), S3 18 (17–19), S4 17 (17–18), S5 22 (22–23), r3 41 (40–42), r4 6, r5 5 (5–6), R1 5. Most dorsal setae stout and barbed in the apical half, except for short, simple z1, j2, s1–s2, r4–r5 and R1. Setae j3, z2–z4, s3–s6, S1–S5 and Z4 with a minute hook at the base; Z5 particularly longer and thicker than other dorsal setae, provided with fine barbs along almost its entire length.

Ventral idiosoma ( Figures 1C , 2B and 3B–C ) — Base of tritosternum 15 (15–16) long and 10 (9–10) wide proximally; laciniae 35 (34–36) long. Pre-sternal area with a pair of small, elongate, lightly sclerotized punctuate plates. Sternogenital shield essentially smooth, 168 (167–170) long at mid–line and 80 (77–82) wide at level of st2, with five pairs of setae (st1–st5)

and three pairs of lyrifissures (iv1–iv3); posterior margin strait to slightly concave. Ventrianal shield weakly lineate-reticulate, 105 (100–110) long at mid-line and 150 (145–160) wide at widest level; with five pairs of setae (JV1, JV2, JV3, JV5 and ZV2) in addition to circumanal setae; ZV1 on unsclerotized opisthogastric cuticle; JV4 and ZV3 absent. One pair of discrete semicircular metapodal plates present. Setal measurements: st1 26 (25–26), st2 22 (21–23), st3

22 (21–22), st4 18 (17–18), st5 18 (17–20), JV1 15 (14–16), JV2 15 (14–15), JV3 10 (9–10),

JV5 10 (9–10), ZV1 11 (10–12), ZV2 10 (10–11); para–anal 17 (16–18), post–anal 32 (31–34).

Leg lengths — I: 389 (382–396); II: 370 (363–380); III: 361 (352–362); IV: 491 (480–504).

Specimens examined

13 ♂♂ + 10 ♀♀ collected by E. da S. Araújo from buds of Theobroma cacao L. ( Malvaceae )

at CEPLAC, Ilhéus, Bahia state, Brazil (14º45′35“S, 39º13′49”W); 7 ♂♂ + 5 ♀♀ collected on

17 May 2023 on 2 slides (nr. 28 with 5 ♂♂ + 3 ♀♀ and nr. 118 with 2 ♂♂ + 2 ♀♀); 4 ♂♂ collected on 7 November 2023 on 4 slides (nrs. 261, 262, 263 and 264); 2 ♂♂ + 5 ♀♀ collected on 7 November 2023 on a stub. Holotype + 3 paratype ♀♀.

Figures

Figure 1 Lasioseius jorgeamadoimale: A – Chelicera and spermatodactyl; B – Dorsal view; C – Ventral view.

Figure 2 Lasioseius jorgeamadoimale: A – Dorsal view; B – Ventral view. The arrow points to a detached spermatodactyl.

Figure 3 Lasioseius jorgeamadoimale: A – Chelicera and spermatodactyl; B – Sternogenital shield; C – Ventrianal shield; D – Same, anterior view showing right metapodal plate (mp).