Chrysomphalus

Smith-Pardo, Allan H., Evans, Gregory A. & Dooley, John W., 2012, A review of the genus Chrysomphalus Ashmead (Hemiptera: Coccoidea: Diaspididae) with descriptions of a new species and a new, related genus, Zootaxa 3570, pp. 1-24: 5-6

publication ID

http://doi.org/ 10.5281/zenodo.282977

publication LSID

lsid:zoobank.org:pub:68A889B1-51C1-40B2-A264-DE8AE782B94C

persistent identifier

http://treatment.plazi.org/id/0382231A-FFC4-FFBF-1398-FEB4FA78FAFA

treatment provided by

Plazi

scientific name

Chrysomphalus
status

 

Key to the species of the genus Chrysomphalus   based on adult females

1 a. Perivulvar pores absent (or with only 1 pair in some individuals of C. variabilis   )................................ 2

1 b. Perivulvar pores present............................................................................. 7

2 a (1 a). Prosoma heavily sclerotized; paraphysis between L 2 and L 3 with a double apex; perivulvar pores absent or with only 1 pair; only known on Santalum   in Australia..................................... C. variabilis McKenzie   (in part)

2 b. Prosoma not heavily sclerotized; paraphysis between L 2 and L 3 with a single apex; perivulvar pores absent.......... 3

3 a (2 b). L 1 with rounded apices; thoracic tubercle present or absent; only known on Eucalyptus   in Australia................. 4

3 b. L 1 with trilobed apices; thoracic tubercle absent; not known from Australia nor on Eucalyptus   ..................... 5

4 a (3 a). Thoracic tubercle present; second pygidial furrow each with 10-14 ducts in double rows..... C. rubribullatus Brimblecombe  

4 b. Thoracic tubercle absent; second pygidial furrow with less than 10 ducts in a single row.................................................................................................. C. trifasciculatus Brimblecombe  

5 a (3 b). Plates anterior to L 3 with clavate apices; L 3 notched once on each side; only known on Prunus   in China................................................................................................... C. mume (Tang)  

5 b. Plates anterior to L 3 with fringed apices; L 3 with two or more lateral notches on each side........................ 6

6 a (5 b). L 1 tri-lobed, with a notch on each side; prepygidial segments A 1 -A 3 each with 2 macroducts; on orchids in the Philippines............................................................................. C. nulliporus (McKenzie)  

6 b. L 1 bi-lobed, with a notch only on lateral margin; prepygidial segments A 1 -A 3 apparently lacking macroducts; only known on tea ( Thea   ) in Madagascar.......................................................... C. aberrans (Mamet)  

7 a (1 b). Prosoma heavily sclerotized, beset with fine irregular lines; only known from Australia.......................... 8

7 b. Prosoma membranous, without sclerotized fine irregular lines; widespread species or those known from other regions.. 9

8 a (7 a). Thoracic tubercle absent; perivulvar pore groups each with no more than 2 pores; second and third pygidial furrows each with 10–14 ducts in single or double rows; first pygidial plate anterior to L 3 entire; only known on Santalum   from Australia..................................................................... C. variabilis McKenzie   (in part)

8 b. Thoracic tubercle present; perivulvar pore groups each with 2 to 4 pores; second and third pygidial furrows with 14–16 ducts in double or triple rows; first pygidial plate anterior to L 3 forked; various hosts in Australia.. C. fodiens (Maskell)  

9 a (7 b). First two plates anterior to L 3 with clavate apices....................................................... 10

9 b. First two plates anterior to L 3 with fringed apices...................................................... 13

10 a (9 a). Prepygidial segments lacking a dorsal cluster of 4 or more ducts; numerous hosts, widespread................................................................................................... C. dictyospermi (Morgan)  

10 b. Prepygidial segments with at least one segment with a cluster of 4 or more dorsal ducts........................ 11

11 a (10 b). Prepygidial segments A 2 and A 3 each with a submarginal dorsal cluster of ducts; pygidial furrows two and three each with ducts forming a single irregular row; numerous hosts, widespread.......................... C. bifasciculatus Ferris  

11 b. Only prepygidial segment A 2 with a submarginal dorsal cluster of ducts; pygidial furrows two and three each with ducts forming 2 to 3 rows............................................................................... 12

12 a (11 b). Test including exuvia uniformly reddish-brown in color; numerous hosts, widespread.......... C. pinnulifer (Maskell)  

12 b. Test variable from pale black to purplish in color, with only exuvia reddish-brown in color; numerous hosts, widespread................................................................................ C. diversicolor (Green)  

13 a (9 b). Prepygidial segment A 2 with a dorsal cluster of 5 or more ducts along lateral margin; numerous hosts, widespread..................................................................................... C. aonidum (Linnaeus)  

13 b. Prepygidial segment A 2 without a dorsal cluster of 5 or more ducts along lateral margin........................ 14

14 a (13 a). Second and third pygidial furrows each with 12-20 ducts; L 1 notched only on outer margin...................... 15

14 b. Second and third pygidial furrows each with less than 10 ducts; L 1 notched on both margins or only on outer margin...... 16

15 a (14 a). Prepygidial segments A 1, A 2 and A 3 with 3, 2 and 1 macroduct, respectively; on palms ( Arecaceae   ) and Pandanus   from Oriental and Pacific Island regions.................................................... C. propsimus Banks  

15 b. Prepygidial segment A 3 with 2 or 3 macroducts; A 2 with 0 or 1 macroducts and A 1 without macroducts; on Nepenthes   from Thailand................................................................. C. nepenthivorus   sp. nov.

16 a (14 b). Pygidium with 3 fringed plates present between L 3 and L 4, each with a pair of terminal processes; anal opening separated from base of L 1 by less than 1.5x its diameter; paraphysis arising from medial angle of L 1 subequal in length of that arising from anterior base of L 1; on Cocos   and Litsea   from Seychelles.............................. C. ansei (Green)  

16 b. Pygidium with 4 fringed plates present between setae marking positions of L 3 and L 4, each without a terminal process; anal opening separated from base of L 1 by more than 2 x its diameter; paraphysis arising from medial margin of L 1 about two-thirds length of that arising from lateral angle of L 1; on Fabaceae   in China.................... C. silvestrii Chou