Palliolatrix Prena, 2006

Prena, Jens, 2006, Descriptions of Palliolatrix gen. n. and seven new species from Middle America (Coleoptera: Curculionidae: Baridinae), Zootaxa 1319 (1), pp. 15-28 : 16-18

Palliolatrix Prena gen. n.

( Figs. 1–28 )

Recognition. Palliolatrix is related to Peridinetus Schönherr and Peridinetellus Champion , with the general habitus approaching that of Peridinetus lateralis Champion. Species of these three genera possess dentate femora, a prosternal channel and have the procoxae separate. Palliolatrix differs from Peridinetus and Peridinetellus by the character states given in Table 1.

Palliolatrix gen. n. Peridinetus , Peridinetellus

Eyes size moderate, separated by width of size larger, almost always separated by

rostrum at base or more less than width of rostrum at base

Frontal fovea minute or absent deep, elongate (except in female P. sanguinolentus and species with oval body shape)

Antenna inserted in apical 29–42 % of rostrum inserted at midlength of rostrum

Rostrum ventral margin edged, dorsal margin subcylindrical in cross­section,

curved at antennal insertion; upper curvature even; antennal scrobe less

margin of antennal scrobe reaching descending, upper margin not reaching

ventral edge of rostrum before eye ventral edge of rostrum

Pronotum as long as wide or longer (slightly evidentially transverse, anterior

transverse in female P. attenuata ), margin moderately produced

anterior margin strongly produced

Male internal sac with thin, sclerotized internal sac with tubiform basal scle­

flagellum longer than body of aedeagus rite generally not longer than body of aedeagus (elongate in some smallsized species)

Description. Habitus ( Figs. 1–10 ): total length 4.2–10.3 mm, standard length 4.1–9.9 mm, humeri prominent, elytral disk nearly plane in lateral view. Color: integument reddish to dark brown, basic vestiture of minute scales, prothorax, elytra and flank often with color­pattern of large, imbricate scales. Head: retractile to hind margin of eyes, finely punctate, eyes of moderate size, not bulging, separated by width of rostrum at base or more, frontal fovea minute or absent, transition to rostrum depressed. Rostrum: moderately thick, basal portion curved gently, more (occasionally abruptly) curved at antennal insertion, apex slightly widened in dorsal view, ventral edge present below antennal scrobe, mandibles barely projecting behind labrum when closed, outer margin of mandible curved, secondary inner mandibular tooth distinct, antenna inserted in apical 29–42% of rostrum, scrobe descending and reaching ventral margin of rostrum before eye, scape not quite reaching base of rostrum, apex of scape tumid, funicle of 7 segments, club pubescent, oblong ovate, transition to funicle abrupt. Pronotum: as long as wide or longer (slightly transverse in female P. attenuata ), greatest width at base or further apicad when sides subparallel in basal half, anterior margin produced over head, integument finely punctate. Scutellum: visible, transverse. Elytra: sides slightly convergent, apices rounded conjointly or nearly so, pygidium covered by elytral apices, humeri prominent, much wider than prothorax, striae subtle, punctures of varied size and depth, interstriae flat or convex, 9 faintly costate occasionally, preapical callus prominent, interstria 3 medially with or without tumidity or callus. Venter ( Fig. 11 ): procoxae separated by less than one­ third of own width, prosternal channel distinct, moderately deep, channel ending at procoxae. Legs: femora moderately expanded dorsoventrally, ventral tooth present ( Figs. 12–15 ), of subequal size at all legs, tibia ventrodistally with short cluster of long hairs, mucro well developed, premucro absent, tarsomere 3 bilobed, wider than 1 and 2, clawbearing tarsomere 5 approximately 2× longer than 3, claws straight, approximate but not fused at base. Male ( Figs. 11, 16–25 ): distal ventrite with median depression deeper and pronotum often larger compared to females, sexual dimorphism otherwise indistinct (particularly in small­sized specimens); sternite 8 membranous, distal margin and lateral portions pigmented; sternite 9 slightly curved, with 2 asymmetric lateral arms; tegmen as Fig. 19 , aedeagus as Fig. 20 , with more­or­less developed anterolateral membranous portion, apodemes slender, approximately 3× longer than body of aedeagus, internal sac nearly as long as apodemes, with ejaculatory duct modified to thin, sclerotized flagellum slightly longer than body of aedeagus ( Fig. 23 ), base of flagellum curved gently, with minute basal appendage attached distally to internal sac, duct inserted at outer face of base of flagellum outside internal sac. Female ( Fig. 26–28 ): sternite 8 symmetric, with 2 diverging, basally sclerotized arms, distal portion of arms pigmented, shapes various; hemisternite pigmented, stylus with approximately 10–15 distal setae, large­sized species with additional cluster of subdistal setae; spermatheca small, sclerotized; spermathecal duct short, not or little extended beyond bursa, not pigmented, inserted ventrally at midlength of bursa. Stridulatory organ: present in both sexes, ventral apical portion of elytral interval 2 with stridulatory files, tergite 8 and basal portion of tergite 7 with decumbent, elongate scales in irregular punctuation functioning as plectra, specialized asperities absent.

Etymology. Derived from Latin palliolum and modified by suffix; the “hood­wearer”; gender feminine.

Type species. Palliolatrix palliolatrix Prena sp. n., described below.

Figures

FIGURES 1–10. Dorsal and lateral aspects of species of Palliolatrix. 1, P. quadrimaculata (HT); 2, P. quadrimaculata s. l. (Guatemala, Zapotitlan); 3, P. tuberosa; 4, P. infucata; 5, P. attenuata; 6–7, P. palliolatrix; 8, P. pulchra; 9, P. crassa; 10, P. virgata.

FIGURES 11–28. Palliolatrix. 11, venter, male, P. palliolatrix. 12–15, metafemur and tibia; 12, P. palliolatrix; 13, P. infucata; 14, P. crassa; 15, P. pulchra. 16–25, male genitalia and associated structures; 16, sternite 8, P. palliolatrix; 17, sternite 9, P. palliolatrix; 18, ditto, P. crassa; 19, tegmen, P. palliolatrix; 20, aedeagus, lateral, P. palliolatrix; 21, apex of aedeagus, dorsal, P. palliolatrix; 22, ditto, P. crassa; 23, aedeagal flagellum, P. palliolatrix; 24, ditto, detail; 25; ditto, P. crassa. 26–28, female genitalia and associated structures, P. palliolatrix; 26, sternite 8; 27, genital tract; 28, stylus. Scale 0.5 mm for genitalia except 24–25 (0.1 mm), 27 (1.0 mm) and 28 (0.2 mm).