Saissetia kunmingensis Cao & Feng

Cao, Tong, Zhang, Na & Feng, Jinian, 2019, The genus Saissetia (Hemiptera, Coccomorpha, Coccidae) in China, with description of a new species, ZooKeys 873, pp. 55-63 : 58-61

Saissetia kunmingensis Cao & Feng sp. nov.

Material examined.

Holotype: adult female. Kunming, Yunnan Province, China. 25°04'N, 102°42'E. 1.vii.2018, on Osmanthus fragrans ( Oleaceae ), Cao Tong, Zhang Na (NWAFU). Paratypes: one adult female on the same slide with holotype, in the lower left corner, 4 adult females on another 2 slides, each slide with 2 specimens, data same as holotype.

Diagnosis.

The adult females of S. kunmingensis sp. nov. can be diagnosed by a combination of the following features: (1) body almost circular to broad oval; (2) derm with sclerotized reticulations well developed; (3) dorsal submarginal tubercles convex, one or two between anterior stigmatic clefts, one or two between anterior and posterior stigmatic clefts, and three or four between each posterior stigmatic cleft and anal cleft; (4) dorsal tubular ducts absent; (5) dorsal setae conical, thick and spinose; (6) anal plates each with a distinct long discal setae with a sharp and pointed apex; (7) marginal setae slender, straight, mostly with a toothed apex, occasionally with a simple pointed apex; (8) antennae with 8 segments; (9) spiracles normal, with a distinct sclerotic plate, rarely indistinct; (10) legs with tibio-tarsal articulation and a small tibio-tarsal articulatory sclerosis; (11) multilocular disc-pores usually have 10 loculi, occasionally 11, present around vulva, across mediolateral of all abdominal segments, a few present laterad to metacoxa, sometimes present on thorax; (12) three types of VTDs (for descriptions and distributions of these see species description).

Description.

Appearance of live insects. Insects yellow brown, mature adult females dark brown and reddish brown. Body broadly oval, almost circular. Dorsum of mature adults strongly sclerotized, distinctly convex with H-shaped ridge present.

Slide-mounted adult female. ( Fig. 1 ) Body broadly oval, almost circular, broadest in anterior abdomen and thorax; body length 2.0-3.0 mm, width 1.5-2.0 mm. Anal cleft approximately 1/7-1/6 of the body length.

Dorsum. Derm with cell-like and polygonous clear areas (areolations), sclerotized reticulations on mature insects. Dorsal setae conical and sturdy, each with a pointed apex and a well-developed basal socket, scattered on dorsum, total length about 20.1-28.9 μm long (or 14.2-21.0 μm long excluding a basal socket). Submarginal tubercles numbering 1 or 2 between anterior stigmatic clefts on head, 1 or 2 between anterior and posterior stigmatic clefts, and 3 or 4 between each posterior stigmatic cleft and anal cleft. Dorsal microducts distinctly present in cell-like clear areas. Dorsal tubular ducts absent. Preopercular pores distinct, slightly convex and circular, present in front of anal plates, numbering 16-20. Anal plates each triangular, together quadrate, 240.8-267.2 μm long, 211.9-229.6 μm wide, anterolateral margin slightly convex, 118.9-140.3 μm long, posterolateral margin slightly convex, 208.3-215.6 μm long, posterior margin longer than anterior margin, outer angle slightly obtuse; plates with a well-developed supporting bar, a distinct long discal seta with a sharp and pointed apex, and 3 apical setae. Ano-genital fold with 4 pairs of anterior margin setae, 42.1-47.2 μm long and 2 lateral marginal setae, 70.9-74.6 μm long. Anal ring subcircular, with 8 anal ring setae.

Margin. Marginal setae 66.9-80.6 μm long, with well-developed basal sockets, mostly slender and straight, with a frayed, fimbriate and branched apex, but a few marginal setae with sharp and rather bluntly pointed apices; with 38-44 setae between anterior stigmatic clefts, 9-10 setae between anterior and posterior stigmatic clefts on each side, and 27-31 setae between the posterior stigmatic cleft and anal cleft. Stigmatic clefts not deep but distinct, each cleft containing three slender, tapered and bluntly spinose stigmatic spines, with well-developed basal sockets; median spine longest, 129.8-133.9 μm long, about 5 to 6 times as long as the lateral spines, each 26.2-29.0 μm long.

Venter. Derm membranous. Antennae with 8 segments, rarely 7 segments, total antennal length 453.8-463.4 μm; segment III longest. Usually 3 pairs of setae present between antennae near their base, 1 pair of short inner setae and 2 pairs of long outer setae. Three pairs of long pregenital setae present, 160.8-183.5 μm long. Other ventral setae setose, short and fine, quite sparsely distributed, 8.4-17.1 μm long. Submarginal setae 22.7-37.5 μm long, present in a single row around body. Legs well developed, each with tibio-tarsal articulation and a tibio-tarsal articulatory sclerosis which are rarely absent, tibia 154.8-176.4 μm long, longer than tarsus, which is 119.6-128.9 μm long. Claw without a denticle; claw digitules broad and expanded at apex, about 32.0-32.4 μm long. Tarsal digitules longer than claw digitules, slender, knobbed, expanded at apex, about 48.6-54.9 μm long. Spiracles normal, with a distinct sclerotic plate (rarely indistinct). Spiracular disc-pores mostly with five loculi in the outer ring; spiracular pore bands narrow, each 3-4 rows wide. Anterior spiracular pore band with 11-19 pores, posterior spiracular pore band with 12-20 pores. Multilocular disc-pores each primarily with 10 loculi, occasionally 11, present around vulva, becoming progressively less frequent anteriorly, but present across mediolateral areas of all abdominal segments, a few present laterad to metacoxa, sometimes present on thorax. Ventral tubular ducts (VTDs) present, of three types; I, II and III ( Fig. 2 ). Type I ducts have a rather long, broad outer ductule, 23.9-28.5 μm long, and a narrow inner ductule of similar length, 24.9-29.8 μm long, width of inner ductule being half or less than half of width of outer ductule, with a well-developed flower-shaped terminal gland; type I ducts are present submarginally in a broad band around the body, and mediolaterally on posterior abdominal segments. Type II ducts have a slightly short, broad outer ductule, 13.2-20.8 μm long, and an extremely narrow filament-like inner ductule longer than the outer ductule, 17.1-31.6 μm long, with a well-developed terminal gland; type II ducts are located submarginally and mediolaterally on posterior abdominal segments, becoming sparse, few and discrete between 2 spiracular pore bands and on the anterior of the head. Type III ducts have a short outer ductule, 7.4-11.1 μm long, and a fine inner filament-like ductule without any terminal gland; these are distributed submarginally on posterior abdominal segments, and rarely on the outer submarginal area of the head.

Etymology.

The species epithet kunmingensis refers to the place where this new species was collected, i.e., the city of Kunming.

Host plant.

Osmanthus fragrans (Thunb.) Lour.

Distribution.

Yunnan Province (China).

Key to adult females of Saissetia species occurring in China

Morphological separation of S. kunmingensis sp. nov. from S. coffeae and S. oleae

Saissetia kunmingensis sp. nov. is morphologically similar to S. coffeae , which also has three types of VTDs, but these can be separated by the features shown in Table 1. (For descriptions of the types of VTDs see the generic diagnosis).

Saissetia kunmingensis sp. nov. also has similar morphology to S. oleae . The morphological features that can be used to separate these two species are shown in Table 2.

Figures

Figure 1. Saissetia kunmingensis Cao & Feng, sp. nov., adult female. The dorsal surface is depicted on the left side and the ventral surface on the right side, with some important characters shown enlarged around the main illustration. Abbreviations: AGF ano-genital fold ANP anal plates ANT antenna DMD dorsal microduct DS dorsal seta DT dorsal tubercles LG tibio-tarsus of hind leg MS marginal setae MLDP multilocular disc-pore POP preopercular pores SDP spiracle disc-pore SSP stigmatic spines VTD ventral tubular ducts of type I-III VS ventral setae.

Figure 2. Ventral tubular ducts of Saissetia kunmingensis Cao & Feng, sp. nov. A type I, type II and type III VTDs present submarginally on posterior abdominal segments B type II VTD present submarginally on posterior abdominal segments C type II VTD present mediolaterally on posterior abdominal segments D type I and type II VTDs present submarginally around body E type I and type II VTDs present submarginally around body F type I VTDs present mediolaterally on posterior abdominal segments.