Coscinoptera argentina Burmeister

Agrain, Federico A. & Marvaldi, Adriana E., 2009, Morphology of the first instar larva in the tribe Clytrini, with two new descriptions in the subtribe Megalostomina (Coleoptera: Chrysomelidae: Cryptocephalinae), Zootaxa 2147, pp. 59-68 : 65

Coscinoptera argentina Burmeister

( Figs. 6–10 , 21–30 )

First instar larva (characters defining the tribe are not repeated here) ( Figs. 7–10 , 21–30 ).

Maximum dimensions. Body length 1.56 mm; Head width 0.33 mm.

Head with a characteristic sculpture pattern, of round tubercles evenly distributed between setae, on frons and epicranial halves ( Fig. 7 ). Frons with 6 setae, spatulate papillate in shape. Labrum sinuate on anterior margin, without 3 distinct lobes. Epipharyngeal sensilla clustered anteriorly in a row. Maxillary galea with row of 4 dorsal setae plus 2 setae at base. Sides of prementum protrudent and with microtrichae.

Egg and first larval case ( Fig. 10 ) brown, fecal plates forming a regular sculptured pattern of subhexagonal shapes, ending posteriorly in elongated plates.

Material examined. Three first instar larvae (two slide-mounted) from eggs deposited by adults collected in ARGENTINA : Mendoza Province, Cdad. Mendoza, Parque Gral. San Martín (Lat. -32.893142; Long. - 68.890388), December 2002, feeding on leaves of Prosopis chilensis, A. E. Marvaldi coll. (IADIZA). A total of four adults were collected by hand, from the host plant foliage.

Remarks. The egg-case of C. argentina is similar in aspect to that of C. dominicana , documented by Riley (1874) and reproduced by Erber (1988: Fig. 16.5), but the latter has an egg stalk or pedunculus.

Figures

FIGURES 1 – 10. (1 – 5) Megalostomis (H.) lacordairei Lacordaire. 1. Adult female habitus, anterolateral; 2 – 5. First instar larva, 2. Head capsule, one half dorsal, showing cuticle sculpture pattern of frons and epicranium; 3. habitus, lateral; 4. Detail of thoracic spiracle; 5. Larva in its case.

FIGURES 21 – 30. Coscinoptera argentina, first instar larva. 21, 22. Head, dorsal and ventral; 23. Detail of (left) antenna; 24. Clypeus-labrum; 25. Epipharynx; 26. Mandible; 27. Maxilla and labium (a, ventral; b, dorsal maxilla); 28. Thorax and 1 st abdominal segment, dorsolateral (one side); 29. Detail of tubercle bearing egg burster and setae; 30. Proleg, lateral. Scales = 0.1 mm.