Amblyseius duplicesetus Moraes & McMurtry, 1988

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 : 856-859

Amblyseius duplicesetus Moraes & McMurtry

Amblyseius duplicesetus Moraes & McMurtry 1988: 13 ; Moraes et al. 2004a: 143, 2004b: 22 ; Zannou et al. 2007: 10 ; El-Banhawy & Knapp 2011: 25 .

Amblyseius duplicisetus [sic], Chant & McMurtry 2004: 208, 2007: 78.

Description of adult male of Amblyseius duplicesetus Moraes & McMurtry (n = 10, five from Anjouan, three from Mohéli and two from Grande Comore Islands, Figs 4 a-d)

Dorsum ( Fig. 4a ) – Dorsal shield smooth, 271 (262–295) long and 174 (150–193) wide, with seven solenostomes (gd1, gd2, gd4, gd5, gd6, gd8 and gd9) similar to adult female, seven pairs of poroids visible, but probably more present, 19 pairs of dorsal setae (r3 and R1 on dorsal shield): j1 31 (29–33), j3 44 (43–45), j4 8 (6–8), j5 5 (5–6), j6 8 (7–8), J2 9 (8–10), J5 8 (8–9), z2 9 (8–10), z4 9 (8–10), z5 5 (5–6), Z1 9 (8–11), Z4 61 (56–70), Z5 218 (200–238), s4 68 (63–73), S2 11 (10–12), S4 10 (9–11), S5 8 (7–9), r3 10 (8–13), R1 11 (9–14). All setae sharp-tipped and smooth, except for Z4 and Z5 lightly serrate.

Peritreme and peritremal plate ( Fig. 4a ) – Extending to level of j1 insertion; peritremal plate fused with dorsal shield at level between j1 and j3.

Venter ( Fig. 4b ) – Sternogenital shield smooth with only few striae in the anterior part and lateral margings, with five pairs of setae (st1-st5) and two pairs of poroids (iv1 and iv2). Distances st1-st1 52 (50–55), st2-st2 55 (50–58), st3-st3 55 (51–58), st1-st5 114 (112–118), st4-st4 36 (31–40), st5-st5 31 (30–34). Ventrianal shield 112 (108–118) long, 148 (138–158) wide at anterior corners and 59 (50–75) wide at level of para-anal setae. Ventrianal shield anteriorly reticulate (before the line constituted by JV2), with three pairs of pre-anal setae (JV1, JV2 and ZV2) and a pair of small crateriform gv3, between JV2 just below the line between their bases, 22 (20–25) apart. Shield also with a pair of iv5 and three pairs of poroids ivo. Unsclerotized cuticle arround ventrianal shield with a pair of seta (JV5). Seta JV5 smooth, 38 (34–45) long.

Chelicerae ( Fig. 4c ) – Fixed digit 23 (21–24) long, with eight teeth; and movable digit 23 (21–25) long, with one tooth. Spermatodactyl shaft 18 (14–20) and branch 8 (8–9). Pilus dentilis not visible.

Legs ( Fig. 4d ) – All legs with macrosetae sharp-tipped. Measurements: SgeI 36 (33–40), SgeII 31 (28–33), SgeIII 38 (37–40), StiIII 33 (30–38), SgeIV 96 (90–100), StiIV 75 (68–85), StIV 55 (50–58). Chaetotactic formula of genua II and III similar to adult female.

Specimens examined. Twenty-three ♂♂ collected during this study, 10 ♂♂ measured,

13 ♂♂ as complementary voucher material. ANJOUAN ISLAND (5 ♂♂): Chandra, inside the village (436 m aasl, 12°12′36″ S, 44°27′09″ E), 1 ♂ on Acalypha wilkesiana Müller Argoviensis (Euphorbiaceae) , 29/XI/2018 ; Pomoni, exit of the village (29 m aasl, 12°17′01″

S, 44°34′37″ E), 1 ♂ on Artocarpus heterophyllus Lamarck (Moraceae) , 1 ♂ on Artocarpus altilis (Parkinson) Fosberg (Moraceae) and 2 ♂♂ on an uncknown tree with alternate leaves, 30/XI/2018. MOHELI ISLAND (11 ♂♂): Fomboni, inside the town (15 m aasl, 12°17′29″

S, 43°44′35″ E), 1 ♂ on Annona muricata L. ( Annonaceae ), 2/XII/2018 ; Fomboni, Les-Hauts (60 m aasl, 12°17′29″ S, 43°44′35″ E), 2 ♂♂ on an unknown host plant, 2/XII/2018 ; Hoani, inside village (38 m aasl, 12°17′3″ S, 43°44′34″ E), 1 ♂ on the same unknown host plant than above, 1 ♂ on A. muricata , 2 ♂♂ on Artocarpus altilis J.R. Forster and G. Forster (Moraceae) and 1 ♂ on Theobroma cacao L. ( Malvaceae ), 3/XII/2018 ; Bangoma, Les Hauts (137 m aasl, 12°17′18″ S, 43°43′41″ E), 1 ♂ on Cinnamomum odoratum Schäffer (Lauraceae) , 1 ♂ on A. altilis and 1 ♂ on Persea americana Miller (Lauraceae) , 4/XII/2018. GRANDE COMORE ISLAND (7 ♂♂): Mdé, INRAPE (51 m aasl, 11°44′12″ S, 43°14′59″ E), 1 ♂ on Mangifera indica L. ( Anacardiaceae ), 6/XII/2018 ; Mvouni, University of Comoros (434 m aasl, 11°43′11″

S, 43°16′31″ E), 1 ♂ on Myristica fragans Houttuyn (Myristicaceae) and 1 ♂ on Citrus sinensis (L.) Osbeck ( Rutaceae ), 6/XII/2018 ; Dzahani, village (209 m aasl, 11°46′32″ S, 43°16′40″ E),

1 ♂ on Carica papaya L. ( Caricaceae ), 1 ♂ on Artocarpus altilis Parkinson Fosberg (Moraceae) , 7/XII/2018 ; Mdjoiyezi (230 m aasl, 11°50′19″ S, 43°18′29″ E), 1 ♂ on M. indica , 10/XII/2018 ; Mdé, INRAPE (51 m aasl, 11°44′12″ S, 43°14′59″ E), 1 ♂ on Spondias dulcis Solander ex. Parkinson ( Anacardiaceae ), 11/XII/2018.

Voucher material. Twenty-three ♂♂ on 20 slides are deposited in Institut Agro (Montpellier SupAgro) – INRAE Acarology collection, Montpellier, France.

Differential diagnosis and remarks. The male of this species was mentioned in ElBanhawy and Knapp (2011), but it is not indicated that this is the first mention of the male of this species, the male was illustrated, but the description lacks detail ( El-Banhawy and Knapp 2011). We thus decide on a more detailed description of the male of this species.

This species belongs to the largoensis species group as setae J2 and Z1 are present, seta s4 is minute and the ventrianal shield of the female is vase-shaped. It belongs to the largoensis species subgroup as seta Z4 is long, spermatheca has the calyx elongate mostly tubular and the female ventrianal shield is entire ( Chant and McMurtry 2004).

The following combination of characters, indicated in the description of the male of this species, is quite similar to the few described males of species of Amblyseius belonging to the largoensis species group and to the largoensis species subgroup.

Not many characters allow to distinguish it from all males of other species if no females are collected in the same time (all the males used for description were collected with females of this species): the peritreme reaching level of j1, absence of reticulation of the dorsal shield, all dorsal setae including J5 length approximately of the same length (8–11), except for j1, j3, s4, Z4, Z5 longer and z5 shorter, additional macrosetae on all other legs than leg IV, macrosetae of leg IV not sub-equal, a sternogenital shield mostly smooth, a ventrianal shield reticulate, only three pairs of pre-anal setae, a pair of crateriform gv3 between JV2.

All described males of the large species subgroup largoensis have very similar ventrianal shield reticulate with three pairs of pre-anal setae.

Figures

Figure 4 Paratype male of Amblyseius duplicesetus Moraes & McMurtry – a. Dorsal shield, b. Ventral shields, c. Spermatodactyl, d. Genu, tibia and basitarsus of leg IV.