Ferrisia cristinae Kaydan & Gullan, 2012

Kaydan, M. B. & Gullan, P. J., 2012, 3543, Zootaxa 3543, pp. 1-65 : 16-19

Ferrisia cristinae Kaydan & Gullan sp. n.

( Fig. 7)

urn:lsid:zoobank.org:act:64440BCD-57A9-43CB-B766-7121F7681552

Type material. Holotype: adult ♀, ex Tabebuia sp. , ARGENTINA, Tucumán, S. M. de Tucumán, v.2002, M.C. Granara de Willink ( IMLA) . Paratypes: 3 adult ♀, 1 third-instar ♀ (4 slides, including DNA voucher ♀ FBK010, PG88 & PG89), same data as holotype ( BME, USNM) ; 1 adult ♀, 1 third-instar ♀ (2 slides, DNA voucher ♀ FBK011 & PG91), ex palta (avocado), Persea americana , ARGENTINA, Tucumán, El. Guayal Famaillá , V.2002, M.C. Granara de Willink ( BME) ; 4 adult ♀ (4 slides), 5 third-instar ♀, 7 second-instar nymphs, 3 first-instar nymphs (3 slides), ex Tabebuia sp. , ARGENTINA, Tucumán, S. M. de Tucumán, xi.2008, M.C. Granara de Willink (2 adult ♀ in BME, I adult ♀ in USNM, rest in IMLA) .

Other material examined (may not be conspecific with Argentine specimens and measurements not included in the description below): 1 adult ♀, ex Pleurothallis , BRAZIL, Hoboken , 29.x.1940, Adams coll., Hoboken 630 ( USNM) ; 2 adult ♀, ex Pleurothallis , BRAZIL, Hoboken , 30.x.1940, Prince coll., Hoboken 636 ( USNM) ; 2 adult ♀, ex leaves of Schinus terebinthifolius , BRAZIL, Bahia, Salvador , vi.1954, #4871 ( USNM) ; 5 adult ♀ (1 slide), ex Codiaeum variegatum #95, BRAZIL (no locality specified), 19.ix.1997, A.L.B.G. Peronti, 9801139 ( USNM) ; 1 adult ♀, carried by wasp; COSTA RICA, Hacienda Ciruelas , 28 km NW of Cañas, 23.i.1970, M. Kosztarab, C-561 ( USNM) ; 1 adult ♀, ex Inga sp. , COSTA RICA, Prov. Heredia, Rio Frio , 8.i.1970, M. & M. Kosztarab, Herb C 416a ( USNM) ; 1 adult ♀, ex Dracaena leaf, COSTA RICA, intercepted at Miami 15974, 5.iv.1977, E.M. Jones ( USNM) ; 1 adult ♀, ex Bactris stem, DOMINICAN REPUBLIC, intercepted at Miami 28955, 3.viii.1981, K. Niédzwiadek ( USNM) ; 1 adult ♀, ex leaf of Aceraceae , PARAGUAY, intercepted at Miami 085560, 31.v.1989, D. Alborn, 89-7043 ( USNM) ; 2 adult ♀, ex Zingiber sp. , TRINIDAD, 18.iii.1972, R. Heliczer, JFKIA 9756 ( USNM) .

ADULT FEMALE. Diagnosis. Ferrisia cristinae can be diagnosed by the following combination of features (based on 5 type females only): presence of a few (1–6 per segment) small oral-collar tubular ducts usually scattered on ventral margins of last 2–3 abdominal segments; ventral oral-collar tubular ducts generally with a minute discoidal pore touching rim of duct opening (sometimes slightly away from duct opening); dorsal enlarged tubular ducts totalling 95–113 throughout dorsum, with 1 or 2 oval discoidal pores sometimes adjacent to rim of each duct opening; number of multilocular disc-pores on venter of abdominal segments as follows: segment VI (7 or 8), VII (15–22), and VIII + IX (13–19); anal lobe cerarii each with 2 conical setae; both pairs of ostioles present and pairs well developed; translucent pores scattered on dorsal surface of at least hind coxa.

Ferrisia cristinae is most similar to specimens of F. williamsi from Colombia, but in F. cristinae the discoidal pores associated with ventral oral-collar tubular ducts often do not touch the duct rim (in F. williamsi any minute discoidal pores associated with the ducts always touch the rim of the duct opening); furthermore, the translucent pores on the hind coxa of F. cristinae are mostly 0.5–2.0 µm in diameter (mostly 2.0–3.0 µm in diameter in F. williamsi ). Additional specimens of these two species need to be identified based on DNA data and the morphology then studied more closely. F. cristinae can be distinguished readily from F. kondoi by having scattered translucent pores on the hind coxa (none on hind coxa of F. kondoi ), fewer trilocular pores on the anal lobes (35–45 on each lobe of F. cristinae ; 58–62 on F. kondoi ), and fewer ventral oral-collar ducts on the body (56–75 on F. cristinae ; 87–113 on F. kondoi ; excluding those on the posterior abdominal margin) but especially on the posterior abdominal segments where the number of ventral oral-collar tubular ducts is less than half of the number present in F. kondoi . The adult female of F. cristinae differs from that of F. virgata in the position of the discoidal pores, having 1 or 2 pores adjacent to the opening of most dorsal enlarged ducts and ventral oral-collar tubular ducts (discoidal pores never adjacent to duct openings in F. virgata ). F. cristinae can be separated from F. milleri and F. ecuadorensis by the absence of small clusters of oral-collar tubular ducts on the head, thorax and anterior abdominal segments. F. cristinae can be distinguished readily from F. uzinuri by having clusters of small oralcollar tubular ducts on the ventral margins of the posterior abdominal segments (absent in F. uzinuri ).

Description of slide-mounted specimens (based on 5 type females only; Fig. 7). Body 2.06–4.20 mm long (holotype 2.30 mm), 1.12–2.58 mm wide (holotype 1.40 mm). Eye marginal, 60–85 µm wide. Antenna 8 segmented, 610–670 µm long; apical segment 122–125 µm long, 30–32 µm wide. Clypeolabral shield 165–170 µm long, 180–190 µm wide. Labium 195–200 µm long, 120–130 µm wide. Anterior spiracles 67–80 µm long, 36–45 µm wide across atrium; posterior spiracles 75–90 µm long, 60–65 µm wide across atrium. Circulus quadrate, 165–190 µm wide, divided by an intersegmental line. Legs well developed; hind trochanter + femur 460–490 µm long; hind tibia + tarsus 490–500 µm long; hind claw 35–42 µm long. Ratio of lengths of hind tibia + tarsus to hind trochanter + femur 1.04–1.07; ratio of lengths of hind tibia to tarsus 3.0–3.16; ratio of length of hind trochanter + femur to greatest width of femur 4.71–5.20. Tarsal digitules subequal, each 55 µm long. Claw digitules subequal, each 40 µm long. Translucent pores present on hind coxa, and usually also on femur and tibia, totalling 80–93 on all segments combined; with 22–55 on each hind coxa. Ostioles: both pairs present; each anterior ostiole poorly developed, with 17–19 trilocular pores and 4–6 setae; each posterior ostiole with 30–47 trilocular pores and 7–8 setae. Anal ring 110–140 µm wide, with 6 anal ring setae, each seta 160–230 µm long.

Dorsum. Anal lobe cerarii each with 2 conical setae, 25–35 µm long, with 35–45 trilocular pores and 2 or 3 auxiliary setae. Dorsal body setae slender, each 15–65 µm long. Trilocular pores each 4–5 µm in diameter. Enlarged tubular ducts totalling 95–113 on dorsum, each duct 30–38 µm long, 5.0–6.5 µm wide at mid-length, rim of duct opening sclerotised, 7.0–8.0 µm wide, surrounded by a sclerotised circular area 17.5–35.0 µm wide, enclosing 0–2 oval discoidal pores (each generally adjacent to duct opening) and with 1–5 (generally 2–4) setae, each 20–45 µm long, usually within circular sclerotised area closer to edge than to duct opening (especially on abdomen) or on edge of sclerotised area (especially on head); ducts distributed marginally in clusters of 2–5 on head and thorax, on margins of all abdominal segments in groups of 2–4, but with 7–8 ducts on each side of abdominal segment VII, and also 1–2 medially to submarginally on head and thorax, 1–2 medially on each abdominal segment.

Venter. Body setae slender, each 15–180 µm long, longest setae medially on head; apical seta of anal lobe approximately 300 µm long (apex broken on all specimens). Multilocular disc pores present on posterior abdominal segments only: 7–8 pores on segment VI, 15–22 on segment VII, 13–19 on segments VIII + IX; each pore 8–10 µm in diameter. Trilocular pores each 3–5 µm in diameter. Minute discodial pores each 2.0–2.5 µm in diameter, almost always associated with oral-collar tubular ducts, with 1 or 2 pores either touching rim of or near to most oral-collar tubular ducts. Oral-collar tubular ducts on most of venter (excluding margins of posterior abdomen) each 7.5–12 µm long, 2.5–3.5 µm wide, totalling 56–75, distributed as follows: 23–38 on head and thorax, and on abdominal segments: 7–10 total on segments I–III; 2–3 on IV; 2–4 on V; 7–9 on VI; 9–12 on VII; 0–2 (mostly 0) on VIII. Small oral-collar tubular ducts each 7.0–8.0 µm long, 3.0–3.8 µm wide, distributed on margins of abdominal segments as follows: 0–1 on each side of segment VI; 3–6 on each side of VII; 3–6 on each side of VIII, ducts on each segment generally scattered, not forming a tight cluster.

Etymology. This species is named in honour of Dr Cristina Granara de Willink, who collected the type specimens of this species, and who has made significant contributions to knowledge of scale insects in South America and especially Argentina.