Chrysomelidae, , Takizawa, 2003

Clark, Shawn M., Lillrose, Tiffany & Belo Neto, Luiz A., 2013, Leaf Beetles of the Cayman Islands (Coleoptera: Chrysomelidae), Insecta Mundi 2013 (279), pp. 1-41: 3-4

publication ID

http://doi.org/10.5281/zenodo.5175767

publication LSID

lsid:zoobank.org:pub:50B509BC-A8F0-4F02-8DD4-2E5823EFBBA4

persistent identifier

http://treatment.plazi.org/id/4F725324-FF85-1937-5585-FE7F5EE1FD50

treatment provided by

Felipe

scientific name

Chrysomelidae
status

 

Key to Cayman Islands Chrysomelidae  

1.

Terminal abdominal tergite forming easily visible pygidium, not covered by elytra; hind femora much broader than those of front and middle legs; eyes of most species deeply emarginate; pronotum and elytra of most species densely pubescent ................................................................ ...................................................... Bruchinae   (this subfamily not included in this study)

If pygidium exposed and hind femora much enlarged, then elytra glabrous and eye not deeply emarginate ........................................................................................................................................ 2

2(1).

Lateral bead of prothorax absent; prothorax broadest at base and apex, strongly constricted near mid-length; each leg with tarsal claws connate (contiguous in basal half); elytra bicolored, black and yellow ( Fig. 1, 2); length 5.5-6.5 mm .......................... Lema trabeata Lacordaire  

Lateral bead of prothorax well developed; prothorax not distinctly constricted near mid-length; tarsal claws divergent from base to apex ...................................................................................... 3

3(2).

Head opisthognathous, with front or vertex projecting strongly forward; tarsal formula 4-4-4; abdominal ventrites 1 and 2 connate, although suture between them indicated by groove ... 4

Head usually normal, prognathous or hypognathous, with front or vertex not projecting strongly forward; tarsal formula 5-5-5, pseudotetramerous, with penultimate tarsomere minute and usually hidden between lobes of tarsomere 3; abdominal ventrites 1 and 2 usually free ........ 7

4(3).

Body narrow, more than twice as long as broad ( Fig. 3); margins of pronotum and elytra not explanate; antennae porrect, not retractable; elytra strongly carinate and rather coarsely punctate; head, ventral surfaces, antennae, legs, and at least distal area of elytra black; prothorax and at least basal area of elytra red or orange; length 5.8-7.3 mm .............................................. ......................................................................................... Chalepus sanguinicollis (Linnaeus)  

Body in dorsal view round or oval, less than twice as long as broad ( Fig. 4, 5); margins of pronotum and elytra explanate; antennae capable of retraction; elytra not strongly carinate or coarsely punctate; coloration not as above .................................................................................. 5

5(4).

Clypeus (area between antennae and labrum) forming transverse ridge; all tarsal claws simple, clearly without basal appendages; elytral punctures denser ( Fig. 4); length 9.5-10.5 mm ....... ............................................................................................ Physonota jamaicensis (Linnaeus)  

Clypeus longer, flat, somewhat semicircular; either some tarsal claws (at least those of front legs) appendiculate, or tarsal claws simple but appearing appendiculate due to projecting flanks of terminal tarsomere; elytral punctures sparser ( Fig. 5); size smaller, 4.0-5.5 long .............. 6

6(5).

Base of elytra behind pronotum finely crenulate; prothorax next to head with short groove bordered laterally by short carina; tarsal claws simple, although appearing appendiculate due to projecting flanks of terminal tarsomere; color extremely variable, but usually with anterolateral corners of elytra dark ( Fig. 5); length 5.5 mm ........................................... Deloyala guttata (Olivier)  

Base of elytra smooth; prothorax without groove next to head; tarsal claws (at least those of front legs) appendiculate; anterolateral corners of elytra pale; length 4.0- 4.8 mm .................... ............................................................................................. Charidotella jamaicensis (Blake)  

7(3).

Abdomen with ventrites 2 to 4 usually strongly shortened mesally; body subcylindrical, compact ( Fig. 25-32); head deeply inserted into prothorax, vertically flattened; pygidium exposed; antennal —

insertions separated from each other by distance much greater than length of basal antennomere ........................................................................................................................................................... 8

Abdomen with intermediate ventrites not abnormally shortened; body not subcylindrical; head less deeply inserted into prothorax; exposed pygidium absent, except in some species with antennae separated by distance not greater than length of basal antennomere .................... 14

8(7).

Base of pronotum crenulate, without elevated margin (this character sometimes hidden by base of elytra); front femora similar in size to those of middle legs ................................................... 9

Base of pronotum margined by easily visible elevated ridge; front femora much thicker than those of middle legs........................................................................................................................ 13

9(8).