Ferrisia ecuadorensis Kaydan & Gullan, 2012

Kaydan, M. B. & Gullan, P. J., 2012, 3543, Zootaxa 3543, pp. 1-65 : 23-24

Ferrisia ecuadorensis Kaydan & Gullan sp. n.

( Fig. 9)

urn:lsid:zoobank.org:act:B18691C7-9133-4721-935F-0E51497DDFB9

Type material. Holotype: adult ♀, ex Psidium guajava , ECUADOR, 17. i. 1975, Waite & Wright, LA014175-CA ( USNM).

ADULT FEMALE. Diagnosis. Ferrisia ecuadorensis can be diagnosed by the following combination of features: presence of large clusters of small oral-collar tubular ducts on ventral margins of all abdominal segments except abdominal segment I; ventral oral-collar tubular ducts generally with a minute discoidal pore touching rim; dorsal enlarged tubular ducts totalling 98 throughout dorsum, with 1 or 2 oval discoidal pores usually adjacent to rim of each duct opening; number of multilocular disc-pores on venter of abdominal segments as follows: segment VI (3), VII (16), and VIII + IX (12); anal lobe cerarii each with 2 conical setae; both anterior and posterior pairs of ostioles present and well developed.

Ferrisia ecuadorensis is most similar to F. milleri , F. kondoi and F. virgata but the adult female is much more slender than the latter three species. The slide-mounted adult female of F. ecuadorensis can be distinguished readily from other species in the genus by having clusters of small oral-collar tubular ducts on the ventral margins of all abdominal segments except segment I (present only on segments VI–VII or VII–VIII in F. kondoi and on VII–VIII in F. virgata ), and each duct is distinctively shaped with a slanted inner end and a long filamentous inner ductule. The adult female of F. ecuadorensis also differs from those of F. virgata in the position of the discoidal pores, which are usually always found adjacent to the rim of duct openings of both enlarged ducts and ventral oral-collar tubular ducts (discoidal pores never adjacent to rim of duct openings in F. virgata ). Ferrisia ecuadorensis also is similar to F. milleri but it can be separated from this species by the absence of clusters of small oral-collar tubular on head and thorax (present in F. milleri ).

Description of slide-mounted specimen (based on the holotype; Fig. 9). Body elongate oval, 2.37 mm long, 0.95 mm wide. Eye marginal, 65–70 µm wide. Antenna 8 segmented, 730–740 µm long; apical segment 130 µm long, 30–35 µm wide. Clypeolabral shield 185 µm long, 175 µm wide. Labium 200 µm long, 112.5 µm wide. Anterior spiracles 72–75 µm long, 40–45 µm wide across atrium; posterior spiracles 90 µm long, 60–80 µm wide across atrium. Circulus quadrate, 165 µm wide, divided by an intersegmental line. Legs well developed; hind trochanter + femur 550–540 µm long, hind tibia + tarsus 580 m long, hind claw 35 µm long. Ratio of lengths of hind tibia + tarsus to hind trochanter + femur 1.05, ratio of lengths of hind tibia to tarsus 3, ratio of length of hind trochanter + femur to greatest width of femur 4.8. Tarsal digitules subequal, each 60 µm long. Claw digitules subequal, each 45 µm long. Translucent pores present on hind coxa, femur and tibia, totalling about 35 on all segments combined, and scattered across dorsal surface of each hind coxa and near apex of femur and tibia. Ostioles: both pairs present; each anterior ostiole poorly developed, with 43 trilocular pores and 15 setae; each posterior ostiole with 45 trilocular pores and 15 setae. Anal ring 105 µm wide, with 6 anal ring setae, each seta 260–280 µm long.

Dorsum. Anal lobe cerarii each with 2 conical setae, each seta 43 µm long, with 42–44 trilocular pores and 3 or 4 auxiliary setae. Dorsal body setae slender, each 15–80 µm long. Trilocular pores each 4–5 µm in diameter. Enlarged tubular ducts totalling 98 on dorsum, each duct 28–33 µm long, 6–8 µm wide at mid-length, rim of duct opening 9–10 µm in diameter, sclerotised circular area around duct 15–25 µm in diameter, enclosing 1 or 2 oval discoidal pores (most pores touching rim of duct opening), and with 2–6 (usually 2 or 3) setae, each 25–30 µm long, usually either within rim of duct opening (especially on abdomen) or on edge of rim (especially on head); ducts distributed marginally in clusters of 1–6 on head and thorax, on margins of all abdominal segments in groups of 2 or 3, but with 8 or 9 ducts on each side of abdominal segment VII, 8 submedially on head and thorax, with 2 submedially on abdominal segment VI.

Venter. Body setae slender, each 15–180 µm long, longest setae medially on head; apical seta of anal lobe 305 µm long. Multilocular disc pores present on posterior abdominal segments only: 3 pores on segment VI, 16 on VII, and 12 on VIII + IX; each pore 8–10 µm in diameter. Trilocular pores each 4–5 µm in diameter. Minute discodial pores each 2.5 µm in diameter, almost always associated with oral-collar tubular ducts, with 1 or 2 pores touching rim of some oral-collar tubular ducts. Oral-collar tubular ducts on most of venter (excluding margins of posterior abdomen) each 10–11 µm long, 2.5 µm wide, totalling about 35, distributed as follows: 14 on head and thorax, and on abdominal segments: 7 on segments I–III, 2 on IV–VI, 8 on VII, and none on VIII. Small oral-collar tubular ducts each 6–8 µm long, 2.5–3.0 µm wide, inner end of duct distinctively slanted and with a long filamentous inner ductule, distributed on margins of abdominal segments as follows (number for one side of body specified): 32–36 on segment II, 36–39 on III, 32–35 on IV, 42 on V, 38–53 on VI, 47–54 on VII, 36–38 on VIII.

Etymology. This species is named for the country of the only known specimen.

Variation. The BME has a slide with two adult females that closely resemble the holotype of F. ecuadorensis except that they are less slender (2.30–2.57 mm long, 1.14–1.30 mm wide) and the marginal clusters of small ventral oral-collar tubular ducts are confined to the posterior abdominal segments, with each side of the body having a group of ducts as follows: 0–3 on V, 1–6 on VI, 1–18 on VII and 7–15 on VIII, and only an occasional small duct more anteriorly on the margin. These two specimens were collected on citrus at Limeira, near São Paulo, Brazil, 21 March 1958 by S. E. Flanders [S&R # 1805-II-2]. It is impossible to establish the identity of the latter specimens until more material of F. ecuadorensis is collected to determine variation within this new species .