Pseudococcus rosangelae Pacheco da Silva & Kaydan

Pacheco da Silva, Vitor C., Kaydan, Mehmet Bora, Germain, Jean-Francois, Malausa, Thibaut & Botton, Marcos, 2016, Three new species of mealybug (Hemiptera, Coccomorpha, Pseudococcidae) on persimmon fruit trees (Diospyroskaki) in southern Brazil, ZooKeys 584, pp. 61-82 : 74-76

Taxon classification Animalia Hemiptera Pseudococcidae

Pseudococcus rosangelae Pacheco da Silva & Kaydan sp. n. Fig. 5

Type-locality.

Brazil, Farroupilha, Rio Grande do Sul, on fruits in persimmon orchards, Diospyros kaki , 15 Apr 2015, VC Pacheco da Silva leg.

Type-specimen.

Holotype female, Brazil, Farroupilha, Rio Grande do Sul, on Diospyros kaki , on fruits, Apr 2015, coll: VC Pacheco da Silva, MRGC: 2262.

Diagnosis.

Pseudococcus rosangelae Pacheco da Silva & Kaydan, sp. n. is characterized by the following combination of features: (i) multilocular disc pores present on the dorsum, and (ii) dorsal oral collar tubular ducts scattered throughout.

Description.

Adult female. Appearance if life is unrecorded.

Body oval, elongate, 2.72 mm long, 1.32 mm wide. Eye marginal, 40 μm wide, each with 3 discoidal pores. Antennae 8-segmented, 560-565 μm long, with 4 fleshy setae, each 25.0-42.5 μm long; apical segment 102.5 μm long, 32.5-35.0 μm wide, with apical setae 45.0-47.5 μm long. Clypeolabral shield 175 μm long, 202.5 μm wide. Labium 3-segmented, 175 μm long, 122.5 μm wide. Anterior spiracles 75-80 μm long, 45 μm wide across atrium; posterior spiracles 82.5-90 μm long, 55-60 μm wide across atrium. Circulus 125 μm long, 135 μm wide. Legs well-developed; lengths for posterior legs: coxa 245.0-252.5 μm, trochanter + femur 405-410 μm, tibia + tarsus 460-475 μm, claw 37.5-40.0 μm. Ratio of length of tibia + tarsus to trochanter + femur, 1.13-1.16:1; ratio of length of tibia to tarsus, 2.80-2.84:1; ratio of length of hind trochanter + femur to greatest width of femur, 3.72-3.85:1; translucent pores absent on legs. Tarsal digitules capitate, each 50-57.5 μm long. Claw digitules capitate, 35 μm long. Both pairs of ostioles present; anterior ostioles each with a total for both lips of 29-32 trilocular pores and 6 setae; posterior ostioles each with a total for both lips of 35-39 trilocular pores and 3-6 setae. Anal ring 72.5 μm wide, with 6 setae, each seta 140.0-167.5 μm long.

Dorsum. Derm membranous, with 17 pairs of cerarii around body margin, each cerarius with 2-4 cerarian setae. Setae on each anal lobe cerarius 25.0-27.5 μm long, 10 μm wide, plus 67-76 trilocular pores and 3-4 spine-like auxiliary setae. Dorsal setae short and flagellate, each 5-20 μm long, scattered throughout the dorsum. Trilocular pores, each 3.7-5.0 μm in diameter, scattered over entire body. A few minute discoidal pores, each 2.5-3.0 μm in diameter, scattered over dorsum. Oral rim tubular ducts, each 12.5 μm long, 3.7 μm wide at mid-width, rim of duct opening 3.7-5.0 μm wide and outer width 7.5-10 μm, seven in total on dorsum, with two ducts on head, two on thorax, and on abdominal segments, as follows: I 2, III 1, IV 1. Oral collar tubular ducts of two sizes: (i) larger ducts, each 5.0 μm long, 3.7-5.0 μm wide, along entire margin of the body; and (ii) smaller ducts, each 5.0-6.2 μm long, 2.5-3.75 μm wide, present throughout the dorsum but in bands on abdominal segments, as follows: I–III 141, IV 88, V 41, VI 32, VII 25, VIII + IX 26. Multilocular disc pores, each 5.0-7.5 μm in diameter, present on abdominal segments, as follows: I–III 6, IV 2, V 6, VI 10, VII 10, VIII + IX 2.

Venter. Setae short and flagellate, each 7.5-145 μm long, longest setae located medially on head. Apical setae of anal lobe each132 μm long. Trilocular pores and minute discoidal pores scattered all over body. Trilocular pores, each 3.7-5.0 μm scattered throughout the venter. Oral collar tubular ducts of 2 sizes: (i) larger ducts, each 5.0-6.3 μm long, 3.7-5.0 μm wide in the margin of the body and throughout, and (ii) smaller oral ducts, each 6.2-7.5 μm long, 2.0-2.5 μm wide, present throughout, and also as bands across abdominal segments, as follows: I–III 110, IV 69, V 81, VI 60, VII 47, VIII + IX 23. Multilocular disc pores, each 5.0-7.5 μm in diameter, present throughout on the venter and on the abdominal segments, as follows: I–III 46, IV 15, V 30, VI 41, VII 29, VIII + IX 21.

Comments.

Pseudococcus rosangelae Pacheco da Silva & Kaydan most closely resembles Pseudococcus peregrinabundus , Pseudococcus nakaharai and Pseudococcus dasyliriae in having dorsal multilocular disc pores, but Pseudococcus rosangelae can be distinguished from other species in having: (i) oral collar tubular ducts present over the entire dorsum (on other species not scattered all over the dorsum) and (ii) no translucent pores on the hind legs (present in the other species).

Etymology.

This species is named after Rosangela Leme do Prado, mother of the author VCPS.

Host plant.

Diospyros kaki .

Distribution.

Brazil (Farroupilha, Rio Grande do Sul).

Molecular characterization.

No DNA sequence was obtained for Pseudococcus rosangelae .