Antennogasmus cordatus Gimmel, 2013

Gimmel, Matthew L., 2013, <strong> Genus-level revision of the family Phalacridae (Coleoptera: Cucujoidea) </ strong>, Zootaxa 3605 (1), pp. 1-147 : 85-87

Antennogasmus cordatus Gimmel , sp. nov.

( Figs. 24 ; 41b )

Holotype. Male , “ SOUTH AFRICA: NATAL \ Leeukop, E of Pongola \ unable to trace coordinates \ 24.i.1992 Vogt & Holm // NATIONAL COLL. \ OF INSECTS \ Pretoria, S.Afr. // HOLOTYPE ♂ \ Antennogasmus \ cordatus Gimmel \ des. M.L. Gimmel 2011 [red label]” ( SANC), card mounted.

Paratypes (3). “Mkuzi. \ Zululand. \ Dec., 1945. \ DDT Killed. \ DDT No. \ 0 // NATIONAL COLL. \ OF INSECTS \ Pretoria, S.Afr. ” (1 ♂, SANC); “ MADAGASCAR: 45m elv. \ W. of Ft. Dauphin (Tolonaro) \ 25º01´12´´S, 46º38´59´´E \ 15NOV1994, M.A. Ivie & \ D. Pollock, in forest” (1 ♀, MAIC) ; “ SOUTH AFRICA: Transvaal \ 13km, N. Louis Trichardt \ 10-XIII-1990 \ R. Miller & L. Stange ” (1 ♂, FSCA [disarticulated]) all with “ PARATYPE \ Antennogasmus \ cordatus Gimmel \ det. M.L. Gimmel 2011 [yellow label]” .

Description. Total length 3.1–3.3 mm, ovate, evenly convex. Color piceous dorsally, becoming rufous along the extreme posterior and lateral borders of the pronotum, lateral and posterior borders of elytron, and clypeal region; appendages and ventral surface rufotestaceous; with reddish discal maculation on each elytron, variable in size but broadly connected across suture, appearing heart- or butterfly-shaped; strong diffraction grating present on scutellar shield and elytra, absent from pronotum. Antenna sexually dimorphic; in males with antennomere XI greatly elongate, padlike, with deep emargination on anterior border about halfway down length of antennomere, with small emargination on posterior border about 2/3 down length of antennomere, antennomere XI about as long as funicle ( Fig. 24b ); antennomeres IX and X short and transverse; antenna about as long as width of head capsule; in females antennomere XI weakly modified, without distinct emarginations, longer than IX and X combined, about as long as funicle but total antennal length shorter than in male, less than width of head capsule. Head extremely finely, densely punctate; eyes large, separated on frons by about the width of a single eye. Pronotum with punctation finer and more sparse than that of head; with faint posterior border in about medial third; posterior angles slightly acute. Elytron with a single engraved sutural stria, other striae lightly impressed with distinct rows of punctures extending nearly to basal margin, punctures not crescentiform; intervals punctate, punctures smaller than those of striae, relatively dense. Microsculpture absent from dorsal surface. Prosternal process with a few hairlike preapical setae. Protibial ctenidium quite long, extending nearly entire length of tibia. Mesotibial spurs distinctly projecting beyond apical ctenidium; mesotarsomere II longer than I or II. Metaventrite densely, weakly punctate. Longest metatibial spur extending to about halfway point of metatarsomere I; metatarsomere I about as long as remainder of metatarsus ( Fig. 24d ).

Tegmen ( Fig. 24h ) of aedeagus short, with long, pointed dorsal strut; fused parameres with median sulcus extending about halfway from apex; median lobe ( Fig. 24i ) of aedeagus spatulate, distinctly wider in apical half, with complex series of internal sac sclerites, ductus with rows of spicules and a bulblike structure proximal of entry into median lobe. Female genitalia unstudied.

Diagnosis. This species may be recognized by the characters given in the generic diagnosis.

Distribution. Known from three localities in eastern South Africa and one locality in southern Madagascar ( Fig. 44c ).

Etymology. From the Latin cordis (heart), referring to the red heart-shaped marking on the elytra. The epithet is a noun in the nominative singular, standing in apposition.

Figures

FIGURE 24. Antennogasmus cordatus, male. (a) Left mandible, dorsal; (b) left antenna (scale bar = 0.5 mm). (c) Left protibia and tarsus, dorsal; (d) left metatibia and tarsus, ventral (scale bar = 0.5 mm). (e) Hind wing (scale bar = 1.0 mm). (f) Meso- and metaventrite, ventral (scale bar = 1.0 mm). (g) Metendosternite (scale bar = 1.0 mm). (h) Tegmen, ventral; (i) penis, ventral (scale bar = 0.5 mm).

FIGURE 41. Photographs. Olibrus sp.: (a) dorsal. Antennogasmus cordatus, holotype: (b) dorsal. Malagasmus thalesi, holotype: (c) dorsal; (d) ventral. Olibrosoma testacea: (e) dorsal. Apallodes sp.: (f) dorsal. Augasmus humilis: (g) dorsal; (h) ventral. Entomocnemus sp., southeast Asia: (i) dorsal.

FIGURE 44. Collection localities. (a) Malagasmus thalesi distribution in Madagascar; (b) Malagophytus steineri distribution in Madagascar; (c) Antennogasmus cordatus distribution in southern Africa and Madagascar; (d) Paracylomus asiaticus distribution in Sri Lanka; (e) Platyphalacrus lawrencei distribution in Western Australia.