Ferrisia

Kaydan, M. B. & Gullan, P. J., 2012, 3543, Zootaxa 3543, pp. 1-65 : 11-12

Key to species of Ferrisia based on adult females

[NB. There can be substantial variation in certain mensural and meristic features of some species, perhaps due to conditions of development; a few species can be distinguished only by using a combination of features, and reliable identification requires well-mounted specimens and as many as possible to examine variation.]

1. Anterior ostioles absent................................................................................ 2

- Anterior ostioles present................................................................................ 5

2. Anal lobe cerarii each with 2–4 cerarian setae; anal ring with 12–36 setae; multilocular disc pores fewer than 6, usually 1–3 or absent.................................................................................. setosa (Lobdell)

- Anal lobe cerarii each with 2 cerarian setae; anal ring with 6 setae; multilocular pores present at least anterior and posterior to vulva and numbering more than 6......................................................................... 3

3. Dorsal enlarged tubular ducts numbering>10 (usually 100–120); ventral oral-collar tubular ducts of more than one size, smaller ducts always present in clusters on body margin, at least on abdominal segments VII and VIII but sometimes on margins of most segments......................................................................... gilli Gullan

- Dorsal enlarged tubular ducts numbering ≤10, sometimes absent; ventral oral-collar tubular ducts of one size only and never in clusters on body margin................................................................................ 4

4. Rim of each dorsal enlarged tubular duct, if ducts present, usually with 1 or 2 minute pores 2.5–5.0 µm in diameter and at least one duct with these minute pores paired; ventral oral-collar tubular ducts on abdominal segments present in small numbers (fewer than 50)......................................................................... claviseta (Lobdell)

- Rim of each dorsal enlarged tubular duct, if ducts present, usually with 1 or 2 minute pores 2.0–3.0 µm in diameter but pores never in pairs; ventral oral-collar tubular ducts on abdominal segments numbering more than 50...... quaintancii (Tinsley)

5. Ventral oral-collar tubular ducts of at least 2 sizes, smaller ducts present singly or in segmental clusters on body margin, at least on last 2–3 abdominal segments...................................................................... 6

- Ventral oral-collar tubular ducts of one size, often very few, never in clusters on body margin........................ 12

6. Cluster of small ventral oral-collar tubular ducts present marginally only on each of last 2 or 3 abdominal segments....... 7

- Cluster of small ventral oral-collar tubular ducts present marginally at least on each abdominal segment............... 11

7. Minute discoidal pores in sclerotised area of enlarged tubular ducts on dorsum never touching rim of duct opening (be careful not to confuse sockets of broken setae with discoidal pores) ( Fig. 4A); minute discoidal pores associated with larger ventral oral-collar tubular ducts almost never touching rim of duct opening ( Fig. 4B)...................................... 8

- Minute discoidal pores in sclerotised area of enlarged tubular ducts nearly always touching sclerotised rim of duct opening ( Fig. 4C); minute discoidal pores often associated with larger ventral oral-collar tubular ducts and touching rim of duct opening ( Fig. 4D) (except for some ducts of F. cristinae with pores not touching rim).................................... 9

8. Discoidal pores associated with sclerotised area around rim of dorsal enlarged tubular ducts on anterior abdomen usually not touching outer margin of sclerotised area and almost never projecting out from margin ( Fig. 4 A-a); other more variable features: small oral-collar tubular ducts in marginal clusters on posterior abdomen with distal end rounded; antennae usually ≤600 µm, often ≤560 µm long; usually ≥15 multilocular disc pores on venter of abdominal segment VI, often forming at least a partial double row medially; translucent pores present on dorsal surface of hind coxa, especially posterolaterally, although often few in number; one or both anal lobes sometimes with an extra 1 or 2 conical cerarian seta, more slender than other 2 setae; outline of abdomen usually smoothly curvilinearly tapered to anal lobes....................... virgata (Cockerell)

- Most discoidal pores associated with sclerotised area around rim of dorsal enlarged tubular ducts on abdomen situated on outer margin of sclerotised area and often with pore and its surrounding sclerotisation projecting out from margin ( Fig. 4 A-b); other more variable features: small oral-collar tubular ducts in marginal clusters on posterior abdomen with distal end slightly tapered towards attachment of inner ductule (these ducts rare or clusters absent in some Neotropical specimens); antenna usually ≥600 µm long; usually ≤15 multilocular disc pores on venter of abdominal segment VI, typically forming a single, sometimes irregular, row; translucent pores either absent from dorsal surface of hind coxa or, if present, antennae ≥600 µm long; anal lobes usually with just 2 robust conical cerarian setae (except some specimens from Dasylirion ); outline of abdomen slightly indented anterior to level of posterior ostioles in specimens from tropical locations.... dasylirii (Cockerell) stat. rev. 9. Translucent pores absent from hind coxa; each anal lobe with ≥60 trilocular pores; small oral-collar tubular ducts usually in tight segmental clusters on ventral margins of posterior 2 or 3 abdominal segments distributed 0–7 on each side of segment VI, 6–25 on each side of VII, 8–21 on each side of VIII................................................ kondoi sp. n.

- Translucent pores numbering>20 on each hind coxa; each anal lobe with ≤50 trilocular pores; small oral-collar tubular ducts on ventral margins of posterior 2 or 3 abdominal segments either not forming tight clusters or in small clusters, each side of each segment usually with ≤6 ducts...................................................................... 10

10. Ventral oral-collar tubular ducts on abdominal submargin (not those in posterior marginal clusters) sometimes with 2 contiguous elliptical to elongate triangular discoidal pores in sclerotised rim of duct (check with 100x objective); hind coxa with translucent pores mostly 2.0–3.0 µm in diameter; from Colombia....................................... williamsi sp. n.

- Ventral oral-collar tubular ducts on abdominal submargin (not those in posterior marginal clusters) often with a circular discoidal pore in sclerotised rim of duct or on derm nearby; hind coxa with translucent pores mostly 0.5–2.0 µm in diameter; from Argentina................................................................................. cristinae sp. n.

11. Clusters of small oral-collar tubular ducts present on margins of head and each segment of thorax and abdomen; each small oral-collar duct with a rounded inner end; diameter of each discoidal pore associated with small oral-collar tubular ducts about same diameter as rim of duct opening............................................................ milleri sp. n.

- Clusters of small oral-collar tubular ducts present only on margins of each abdominal segment; each small oral-collar duct with inner end slanted towards attachment of inner ductule; diameter of each discoidal pore associated with small oral-collar tubular ducts much smaller than diameter of rim of duct opening....................................... ecuadorensis sp. n.

12. Multilocular disc pores entirely absent.................................................... meridionalis Williams

- Multilocular disc pores present at least next to vulva......................................................... 13

13. Multilocular disc pores present on abdominal segment VI in a distinct row of 3–10 pores............................ 14

- Multilocular disc pores usually absent on abdominal segment VI, rarely 1 or 2 pores present......................... 16

14. Dorsal enlarged tubular ducts generally numbering 90–110, present on all segments, at least on margins and medially................................................................................................ uzinuri sp. n.

- Dorsal enlarged tubular ducts generally numbering 10–30, generally restricted to body margin....................... 15

15. Ventral oral-collar tubular ducts totalling 50–70; diameter of each discoidal pore associated with oral-collar tubular ducts about twice diameter of rim of duct opening; body length ≥ 1.8 mm long and ≥ 1 mm wide................... colombiana sp. n.

- Ventral oral-collar tubular ducts totalling 13–23; diameter of each discoidal pore associated with oral-collar tubular ducts never twice diameter of rim of duct opening (usually about same diameter); body ≤ 1.8 mm long and ≤1.0 mm wide [on bromeliads]........................................................................................ pitcairnia sp. n.

16. Multilocular disc pores present only posterior to vulva; dorsal enlarged tubular ducts never numbering more than 2; hind trochanter + femur <300 µm....................................................... multiformis Granara de Willink

- Multilocular disc pores present on area anterior and posterior to vulva; dorsal enlarged tubular ducts totalling more than 100; hind trochanter + femur ≥300 µm........................................................................ 17

17. Body shape slender; dorsal enlarged tubular ducts on head and median area of abdominal segments with associated setae situated inside sclerotised area surrounding each duct............................... terani Williams & Granara de Willink

- Body shape broadly oval; dorsal enlarged tubular ducts on head and median area of abdominal segments with associated setae situated on edge of small sclerotised area surrounding each duct............................... malvastra (McDaniel)