Cryptostigma Ferris, 1922

Kondo, Takumasa & Roubik, David W., 2022, Description of a new ant- and stingless-bee-loving species of Cryptostigma Ferris (Hemiptera: Coccomorpha: Coccidae) from Ecuador living inside internodes of Cecropia (Urticaceae), with an updated key to the adult females and first-instar nymphs of the genus, Zootaxa 5190 (4), pp. 543-554 : 552-553

Key to the known first-instar nymphs of Cryptostigma Ferris

1 Antennae each 5 segmented............................................................................ 2

- Antennae each 6 segmented............................................................................ 8

2(1) Dorsal setae arranged in 4 longitudinal rows............................................. C. tuberculosum Kondo

- Dorsal setae arranged in 2 submedian longitudinal rows...................................................... 3

3(2) Mid-ventral setae present on all abdominal and thoracic segments. Marginal setae arranged in a double row, those on dorsal surface sharply spinose, those on ventral surface flagellate.............................. C. guadua Kondo & Gullan

- Mid-ventral setae present on last 3 abdominal segments only. Marginal setae in a single row, all sharply spinose.......... 4

4(3) Head region between eyes with 2 pairs of ventral submarginal setae............................. C. silveirai (Hempel)

- Head region between eyes with 1 pair of ventral submarginal setae.............................................. 5

5(4) Femur of each leg with 6‒8 setae (rarely 4 or 5)............................................................. 6

- Femur of each leg with 3 setae.......................................................................... 7

6(5) With two rows of submarginal setae, outer submarginal setae totaling 7, inner submarginal setae totaling 6 on each side (i.e., seta near apex not paired). With 2 setae present submarginally between anterior and posterior spiracular pore bands. Each posterior stigmatic area with 3 stigmatic setae................................................ C. longinoi Kondo

- With two rows of submarginal setae, outer and inner submarginal setae between posterior stigmatic areas and body apex forming 7 setal pairs on each side. With 3 setae present submarginally between anterior and posterior spiracular pore bands. Each posterior stigmatic area with 3 or 4 posterior stigmatic setae............ C. cecropiaphilum Kondo & Roubik sp. n.

7(5) Ventral submarginal setae on abdomen of 2 types, with outer submarginal setae sharply spinose, and inner submarginal setae slender. Most marginal setae strongly bent................................................ C. rhizophilum Kondo

- Ventral submarginal setae on abdomen all slender. Marginal setae straight.................. C. reticulolaminae Morrison

8(1) Dorsal setae absent................................................................ C. biorbiculus Morrison

- Dorsal setae present................................................................................... 9

9(8) Antennal segment III at least 2x as long as antennal segment IV. Each femur with 4‒6 setae......................... 10

- Antennal segment III only slightly longer than antennal segment IV. Each femur with 9 or more setae.. C. chacoense Kondo

10(9) With 1 pair of ventral submedian setae between meso- and metathoracic areas.................................... 11

- Without a pair of ventral submedian setae between meso- and metathoracic areas................................. 12

11(10) Each femur with 5 setae. Each pair of submarginal setae on abdomen with no more than 1 microduct between them........................................................................................... C. jonmartini Kondo

- Each femur with 4 setae. Most pairs of submarginal setae on abdomen each with 3 or 4 microducts between them......................................................................................... C. melissophilum Kondo

12(10) Claw denticle present. Each femur with 4 setae. Anal plates smooth............................. C. urichi (Cockerell)

- Claw denticle absent. Each femur with 4 or 6 setae. Anal plates reticulate.................... C. inquilinum (Newstead)