Panolcus Gerstaecker, 1860

Anderson, Robert S., 2024, A second species of the genus Panolcus Gerstaecker 1860 (Coleoptera: Curculionidae: Molytinae: Cryptorhynchini) from French Guiana and Suriname with taxonomic changes in Cryptorhynchini, Zootaxa 5437 (1), pp. 15-20 : 16

Panolcus Gerstaecker, 1860

( Figs. 1–12 )

Panolcus Gerstaecker 1860: 377 ; Wibmer & O’Brien 1986: 216 (checklist); Alonso-Zarazaga & Lyal 1999: 138 (catalog).

Type species: Panolcus scolopax Gerstaecker, 1860 by monotypy.

Diagnosis: Easily recognized by the very small head, recessed almost fully in anterior extension of pronotum; large eyes almost fully covered by postocular lobes when rostrum in repose, eyes narrowly separated dorsally by about ½ width of rostrum at base; rostrum of female very fine, shiny, long, curved, reaching or greatly exceeding elytral apex when in repose, that of male much shorter, only weakly curved, terminating at level of hind margin of mesocoxae; anterior portion of pronotum tubuliform (more so in female), disc of pronotum with a pair of lateral tubercles just anterior to midlength; elytra lacking swellings or tubercles, distinctly wider than pronotum at base; scutellar shield large, scaly; sternal channel narrow, deep, extended from prosternum to abdominal ventrite 5 in female, ending in mesoventral cup at level of hind margin of mesocoxae in male; metanepisternum present, sclerolepidia present along metanepisternal suture; legs with femora each with single, large, more distally located tooth on inner margin. Male genitalia distinctive, with lateral margins in apical region abruptly constricted just before apex; parameres well developed.

Remarks: Based on the presence of a distinct mesoventral cup in males ( Fig. 9 ) this genus is removed from Aedemonina and placed in Cryptorhynchina ( Cryptorhynchini ).

Figures

FIGURES 1–6. Panolcus female habitus images. 1, Panolcus scolopax, lateral; 2; Panolcus scolopax, dorsal; 3, Panolcus scolopax, ventral; 4, Panolcus filirostris, lateral; 5, Panolcus filirostris, dorsal; 6, Panolcus filirostris, ventral.

FIGURES 7–12. Panolcus male habitus and aedeagus images. 7, Panolcus filirostris habitus, lateral; 8, Panolcus filirostris habitus, dorsal; 9, Panolcus filirostris habitus, ventral; 10, Panolcus filirostris aedeagus, dorsal view; 11, Panolcus filirostris aedeagus, lateral view; 12, Panolcus scolopax aedeagus, dorsal view.