Typhlodromus (Anthoseius) hartlandrowei Evans, 1958

Kreiter, Serge, Payet, Rose-My, Abo-Shnaf, Reham & Douin, Martial, 2021, New Phytoseiidae (Acari: Mesostigmata) of Mascareignes and Comoros Archipelagos (Indian Ocean): one new record, three new species groups and description of six new species and of six unknown males, Acarologia 61 (4), pp. 845-889 : 882-884

Typhlodromus (Anthoseius) hartlandrowei Evans

Typhlodromus (Typhlodromus) hartlandrowei Evans 1958: 580 ; Chant 1959: 60.

Clavidromus hartlandrowei, Muma 1961: 296 .

Typhlodromus (Neoseiulus) hartlandrowei, Pritchard & Baker 1962: 222 .

Typhlodromus (Anthoseius) hartlandrowei, Moraes et al. 2004b: 328 ; Chant & McMurtry

2007: 155; Ueckermann e t al. 2008: 50.

Diagnosis. The male of this species has four solenostomes (gd2, gd6, gd8 and gd9), all dorsal setae serrate and knobbed, except for j1, z2, S5 and r3 sharp-tipped, J5 smooth and sharp-tipped similar to adult female, peritreme extending to level of z2, three setae on the ventrianal shield with small punctiform pre-anal solenostomes, three macrosetae strongly knobbed. This is a unique combination of characters, which make specimens of this species very different from all other species within the genus Typhlodromus , subgenus Anthoseius .

Description of adult male (n = 1, Figs. 15 a-d)

Dorsum ( Fig. 15a ) – Dorsal shield slightly striate anteriorly and behind setae S2-J2 line, 225 long and 150 wide, with four solenostomes well visible (gd2, gd6, gd8 and gd9), with eight visible poroids, 20 pairs of dorsal setae (r3 and R1 on dorsal shield): j1 21, j3 34, j4 23, j5 22, j6 28, J2 30, J5 9, z2 35, z3 38, z4 42, z5 23, Z4 40, Z5 50, s4 45, s6 45, S2 45, S4 45, S5 18, r3 30, R1 33. All setae serrate and knobbed, except for j1, z2, S5 and r3 sharp-tipped, seta J5 smooth and sharp-tipped similar to adult female.

Peritreme and peritremal plate ( Fig. 15a ) – Extending to level of z2 ; peritremal plate fused with dorsal shield at level of z2.

Venter ( Fig. 15b ) – Sternogenital shield reticulate, except for smooth part between setae st1-st2, with five pairs of setae (st1-st5) and three pairs of poroids (iv1-iv3); distances between st1-st1 40, st2-st2 46, st3-st3 48, st1-st5 95, st4-st4 41, st5-st5 30. Ventrianal shield 95 long, 145 wide at level of anterior corners, and 43 wide at level of para-anal setae. Ventrianal shield reticultae, with three pairs of pre-anal setae (JV1, JV2 and ZV2) and a pair of small punctiform gv3 mesad JV2, 20 apart, two pairs of poroids (iv5 and ivo). Unsclerotized cuticle around ventrianal shield with a pair of setae (JV5). Seta JV5 smooth and knobbed, 48 long.

Chelicerae ( Fig. 15c ) – Fixed digit 20 long, with no teeth visible; and movable digit 20 long, with no teeth visible. Spermatodactyl shaft straight, shaft 15 long, branch with hook-shape 4.

Legs ( Fig. 15d ) – Three macrosetae only on leg IV all strongly knobbed. Measurements: Sge IV 20, Sti IV 15, St IV 36. Genua II and III both with seven setae. Chaetotactic formula of genu II: 2-2/0, 2/0-1 ; genu III: 1-2/1, 2/0-1.

Specimens examined. One single ♂ collected during this study, measured and deposited as complementary voucher material. ANJOUAN ISLAND: Pomoni, exit of the village (29 m aasl, 12°17′01″ S, 44°34′37″ E), 1 ♀ and 1 ♂ on Piper nigrum L. ( Piperaceae ), 30/XI/2018.

Voucher material. One male on one slide is deposited in Institut Agro (Montpellier SupAgro) – INRAE Acarology collection, Montpellier, France.

Remarks. Characters of males are very similar to that of females, except of course for length of setae and few other characters. Ventrianal shield of the male is reticulate as that of female, the sternogenital shield is almost reticulate, of normal size, macroseta StIV of leg IV in the male is the longer followed by SgeIV and StiIV as in adult female, seta JV5 smooth and sharp-tipped as in adult female. The only difference concerns dorsal setae: setae j1, z2, S5 and r3 are sharp-tipped in adult female, while also j3, j5, j6, z3 and z 4 in the male.

Figures

Figure 15 Paratype male of Typhlodromus(Anthoseius) hartlandroweiEvans – a. Dorsal shield, b. Ventral shields, c. Spermatodactyl, d. Genu, tibia and basitarsus of leg IV.