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Anais da Sociedade Entomológica do Brasil

Print version ISSN 0301-8059

An. Soc. Entomol. Bras. vol.29 no.3 Londrina Sept. 2000

http://dx.doi.org/10.1590/S0301-80592000000300008 

SYSTEMATICS, MORPHOLOGY AND PHYSIOLOGY

 

Three new species of phytoseiid mites (Acari: Phytoseiidae) from Brazil

 

Três espécies novas de ácaros fitoseídeos (Acari: Phytoseiidae) do Brasil

 

 

Antonio C. LofegoI; Gilberto J. de MoraesII; James A. McMurtryIII

IDepto. Zoologia, Inst. de Biociências, Universidade de São Paulo, 05508-900, São Paulo, SP, Brazil
IIDepto. Ent., Fitop. e Zool. Agrícola, ESALQ/ Universidade de São Paulo, 13418-900, Piracicaba, SP, Brazil
IIIOregon State University, Corvallis, OR 97331, and University of California, Riverside, USA

 

 


ABSTRACT

Three new species of phytoseiid mites from Brazil are described: Amblyseius neochiapensis sp. n. from Manihot sp. and Amblyseius bahiensis sp. n. from unidentified plant, both collected in the State of Bahia, and Typhlodromalus feresi sp. n. from Mabea sp. collected in the State of São Paulo.

Key words: Taxonomy, Amblyseius, Typhlodromalus, mite, predator.


RESUMO

Três novas espécies de fitoseídeos do Brasil são descritas: Amblyseius neochiapensis sp. n. sobre Manihot sp. e Amblyseius bahiensis sp. n. sobre planta não identificada, ambos provenientes do Estado da Bahia, e Typhlodromalus feresi sp. n. sobre Mabea sp. proveniente do Estado de São Paulo.

Palavras-chave: Taxonomia, Amblyseius, Typhlodromalus, ácaro, predador.


 

 

Most Mesostigmata mites found on plants belong to the family Phytoseiidae Berlese. Species of this family are predominantly predaceous, and many have been extensively studied for practical use in the control of pest mites. Three new species of phytoseiid mites, subfamily Amblyseiinae, from Brazil are described. The nomenclature used in this paper is that of Rowell et al. (1978) for the dorsal setae and of Chant & Yoshida-Shaul (1991) for the ventral setae. Measurements are given in micrometers. Measurements of related species mentioned under the diagnoses were taken from Denmark & Muma (1973, 1989). The following abbreviations are used: ESALQ/USP - Universidade de São Paulo, Escola Superior de Agricultura "Luiz de Queiroz", Departamento de Entomologia, Fitopatologia e Zoologia Agrícola, 13418-900 Piracicaba-SP, Brazil"; USNMNH/FSCA – United States National Museum of Natural History, in the Florida State Collection of Arthropods, Entomology Section, Division of Plant Industry, Florida Department of Agriculture and Consumer Services, Gainesville, Florida, USA.

Amblyseius neochiapensis Lofego, Moraes & McMurtry sp. n.
(Figs. 1-7)

Diagnosis. A. chiapensis DeLeon and A. compositus Denmark & Muma are similar to this new species, but A. chiapensis has longer Z5 (219-251), Sge IV (86-99) and Sti IV (59-63) setae (Denmark & Muma, 1989), whereas A. compositus has shorter Z5 (104) (Denmark & Muma, 1973).

Female. (Figs 1-5) (19 specimens measured)

Dorsum - Dorsal shield smooth, 331 (310-366) long, 194 (175-215) wide at level of s4, j1 28 (25-33), j3 48 (43-59), j4 7 (6-9), j5 5 (4-6), j6 7 (6-9), J2 7 (6-9), J5 7 (6-9), z2 12 (10-15), z4 10 (9-15), z5 5 (4-6), Z1 8 (6-9), Z4 99 (87-105), Z5 161 (143-183), s4 86 (75-94), S2 10 (7-13), S4 9 (7-11), S5 9 (6-12), r3 21 (16-25), R1 10 (7-14). All Setae smooth, except Z4 and Z5 which are serrate.

Peritreme- Extending forward to level of j1.

Venter- All shields smooth. Sternal shield with three pairs of setae and two pairs of pores. Distances between St1-St3 61 (56-64), St2-St2 75 (72-80), St5-St5 69 (62-76). Two pairs of metapodal plates. Ventrianal shield nearly pentagonal, with lateral margins slightly concave, 118 (105-127) long, 74 (64-80) wide at ZV2 level and 73 (70-78) wide at anus level, with three pairs of setae and one pair of preanal pores (gv3) mesad and slightly posterior to JV2.

Chelicera- Fixed digit 33 (31-34) long, with 11 to 12 teeth; movable digit 38 (36-40) long, with three to four teeth.

Spermatheca- Calyx cup-shaped, 6 (5-8) long and 8 (7-9) in diameter; atrium small.

Legs- With setaceous macrosetae of the following lengths: Sge I 33 (27-38), Sge II 33 (29-37), Sge III 34 (30-40), Sti III 28 (22-37), Sge IV 71 (60-78), Sti IV 41 (33-48), St IV 67 (57-76); chetotactic formula of genu II 2-2/1,2/0-1; genu III 1-2/1,2/0-1.

Male. (Figs 6-7) (seven specimens measured)

Dorsum- Dorsal shield smooth, 241 (230-248) long, 163 (149-178) wide at level of s4, j1 24 (22-27), j3 42 (41-43), j4 6 (5-8), j5 4 (3-5), j6 6 (5-9), J2 6 (4-8), J5 6 (5-8), z2 13 (11-16), z4 10 (8-12), z5 4 (4-5), Z1 8, Z4 69 (57-78), Z5 110 (100-116), s4 64 (62-68), S2 10 (8-14), S4 8 (7-11), S5 9 (7-11), r3 16 (14-16), R1 10 (8-11). All setae smooth, except Z4 and Z5 which are serrate.

Peritreme- Extending forward to level of j1.

Venter- Sternogenital shield smooth. Ventrianal shield subtriangular, lightly striated, 104 (97-108) long and 136 (130-140) wide at anterior corners, with three pairs preanal setae; pores gv3 mesad and slightly posterior to bases of JV2; four additional pairs of minute pores at locations shown in Fig. 7.

Spermadactyl- Shaft 17 (16-19) long.

Legs- With setaceous macrosetae of the following lengths: Sge I 24, Sge II 24 (22-24), Sge III 25 (22-27), Sti III 20 (19-22), Sge IV 47 (43-54), Sti IV 27 (22-30), St IV 48 (46-51); chetotactic formula of genus II and III as in females.

Type Material. Holotype female, five paratype females, one allotype and one paratype male (ESALQ/USP), from Manihot sp., Piritiba, State of Bahia, 19-IV-1993, I.A. Almeida; two paratype females and one paratype male (USNMNH/FSCA), same data as holotype.

Etymology. neochiapensis, referring to the similarity of this new species with A. chiapensis.

Amblyseius bahiensis Lofego, Moraes & McMurtry sp. n.
(Figs. 8-13)

Diagnosis. This species is similar to Amblyseius franzellus Athias-Henriot and Amblyseius cinctus Corpuz & Rimando; A. franzellus has longer Z4 (68) and Z5 (130), and gv3 mesad and posterior to JV2; A. cinctus has longer s4 (62), Z4 (79), Z5 (173) and Sge IV (89) setae (Denmark & Muma, 1989).

Female. (Figs 8-11) (12 specimens measured)

Dorsum- Dorsal shield with a few antero-la-teral striae, 321 (302-334) long, 193 (175-204) wide at level of s4, j1 24 (20-25), j3 35 (31-38), j4 7 (6-7), j5 7 (6-7), j6 8 (7-9), J2 10 (8-11), J5 8 (7-10), z2 13 (12-16), z4 9 (9-11), z5 8 (7-9), Z1 11 (10-12), Z4 53 (48-56), Z5 103 (94-108), s4 41 (38-46), S2 17 (15-19), S4 18 (17-22), S5 11 (9-12), r3 14 (12-16), R1 13 (12-14). All setae smooth, except Z4 and Z5 which are serrate.

Peritreme- Extending forward to level of j1.

Venter- Sternal shield smooth with three pairs of setae and two pairs of pores. Distances between St1-St3 59 (56-62), St2-St2 66 (64-70), St5-St5 64 (62-65). Two pairs of metapodal plates. Ventrianal shield slightly striate, nearly pentagonal, with lateral margins slightly concave, 107 (99-121) long, 88 (80-92) wide at ZV2 level, 76 (72-81) wide at anus level, with three pairs of setae and one pair of preanal pores (gv3) mesad to JV2.

Chelicera- Fixed digit 24 (24-25) long, with 10-11 teeth; movable digit 28 (27-29) long, with 3-4 teeth.

Spermatheca- Calyx 9 (8-11) long. The shape of the calyx vary from cylindrical to conical, even in the same individual, probably because of its light sclerotization. Atrium distinguishable as a darker region, apparently flattened on one side, at the proximal end of the calyx.

Legs- With setaceous macrosetae of the following lengths: Sge I 26 (24-27), Sge II 27 (24-30), Sge III 29 (27-32), Sti III 22 (21-24), Sge IV 45 (41-49), Sti IV 35 (32-40), St IV 54 (48-57); chetotactic formula of genu II 2-2/0,2/0-1; genu III 1-2/1,2/0-1.

Male. (Figs. 12-13) (seven specimens measured)

Dorsum- Dorsal shield with a few antero-la-teral striae, with 248 (243-259) long, 165 (157-178) wide at level of s4, j1 18 (16-19), j3 31 (27-32), j4 6 (5-7), j5 5, j6 6 (5-8), J2 7 (5-8), J5 6 (5-8), z2 13 (11-14), z4 9 (8-11), z5 5, Z1 9 (8-11), Z4 41 (38-43), Z5 82 (73-86), s4 33 (30-35), S2 16, S4 19 (16-19), S5 8 (8-11), r3 12 (11-14), R1 14. All Setae smooth, except Z4 and Z5 which are serrate.

Peritreme- Extending forward to level of j1.

Venter- Sternogenital shield smooth. Ventrianal shield subtriangular, striated; 104 (95-108) long, 131 (124-138) wide at anterior corners, with three pairs of preanal setae; gv3 mesad to bases of JV2; four additional pairs of minute pores at locations shown in Fig. 13.

Spermadactyl- Shaft 16 (14-19) long.

Legs- With setaceous macrosetae of the following lengths: Sge I 14 (14-15), Sge II 14 (12-15), Sge III 12, Sti III 12, Sge IV 20 (19-22), Sti IV 16 (15-17), St 26 (26-27); chetotactic formula of genus II and III as in females.

Type Material. Holotype female, one paratype female, one allotype and two paratype males (ESALQ/USP), from unidentified plant, Piritiba, State of Bahia, 13-V-1994, R.S. Oliveira; five paratypes females (ESALQ/USP), from unidentified plant, Piritiba, State Bahia, 07-VI-1994, R.S. Oliveira; two paratype females and one paratype male (USNMNH/FSCA), same data as for holotype.

Etymology. bahiensis, referring to Bahia, the state where the types were collected.

Typhlodromalus feresi Lofego, Moraes & McMurtry sp. n.
(Figs. 14-17)

Diagnosis. This species differs from other species in the same genus by having all dorsal setae capitate, except S5 and J5, and by having a reduced number of teeth on the fixed digit.

Female. (Figs 14-17) (two specimens measured).

Dorsum: Dorsal shield striate antero-laterally and with a distinct areolate pattern in most of the central region, except for part of the posterior half, 336-326 long, 190-200 wide at level of s4, j1 23-24, j3 25-26, j4 12-16, j5 12-13, j6 18-22, J2 20-21, J5 6-7, z2 20-23, z4 30-32, z5 16-18, Z1 28-30, Z4 39-40, Z5 56-57, s4 38-37, S2 30-31, S4 22-23, S5 8-9, r3 24-26, R1 12-13. All setae capitate and smooth, except S5 and J5 which are setaceous; Z5 serrate.

Peritreme: Extending forward to level of j1.

Venter: All shields smooth. Sternal shield with three pairs of setae and two pairs of pores. Distances between St1-St3 62-66, St2-St2 60-62, St5-St5 70-72. Two pairs of metapodal plates. Ventrianal shield with lateral margins slightly concave and with a distinct lobe posteriorly; three pairs of preanal setae and one pair of pores, the latter slightly mesad and posterior to JV2; 110-112 long, 64-72 wide at ZV2 level, 62-64 wide at anus level.

Chelicera: Fixed digit 25 (24-25) long, with five teeth; movable digit 25 (24-26) long, with two teeth.

Spermatheca: Calyx tubular with 28-32 long; atrium nodular.

Legs: With slightly capitate macrosetae of the following lengths: Sge I 7, Seg II 9-11, Sge III 14-16, Sge IV 23-25, Sti IV 12-14, St IV 30; chetotactic formula of genu II 2-2/0,2/0-1; genu III 1-2/1,2/0-1.

Male. unknown.

Type Material. Holotype female and one paratype female (ESALQ/USP) from Mabea sp., São José do Rio Preto, São Paulo, 18-VI-1996, R.J.F. Feres.

Etymology. feresi, in homage to Reinaldo José Fazzio Feres, eminent acarologist of Universidade Estadual Paulista, Brasil, who collected the type specimens.

 

Acknowledgement

This work is part of the BIOTA/FAPESP – The Biodiversity Virtual Institute Program (www.biotasp.org.br).

 

Literature Cited

Chant, D.A. & E. Yoshida-Shaul. 1991. Adult ventral setal patterns in the family Phytoseiidae (Acari: Gamasina) Int. J. Acarol. 17: 187-199.        [ Links ]

Denmark, H.A. & M.H. Muma. 1973. Phytoseid mites of Brasil (Acarina: Phytoseiidae). Rev. Bras. Biol. 33: 235-276.        [ Links ]

Denmark, H.A. & M.H. Muma. 1989. A revision of the genus Amblyseius Berlese, 1914 (Acarina: Phytoseiidae). Fla. Dept. of Agric. and Cons. Serv., Occas. Pap. Fla. State Collect. Artrop. 4: 1-149.        [ Links ]

Rowell, H. J., D.A. Chant & R.I.C. Hanssel. 1978. The determination of setal homologies and setal patterns on the dorsal shield in the family Phytoseiidae (Acarina: Mesostigmata). Can. Entomol. 110: 859-876.        [ Links ]

 

 

Accepted 30/V/2000.