Agathidium hirsutum Miller and Wheeler, 2005

MILLER, KELLY B. & WHEELER, QUENTIN D., 2005, Slime-Mold Beetles Of The Genus Agathidium Panzer In North And Central America, Part Ii. Coleoptera: Leiodidae, Bulletin of the American Museum of Natural History 2005 (291), pp. 1-167 : 124-125

Agathidium hirsutum Miller and Wheeler ,

new species Figures 151 , 284–287 , 367

TYPE MATERIAL: Holotype, Ƌ in MZLU labeled ‘‘ Guatemala: 5 km E Antigua Guatemala 1780 m. 7.XII.1991 leg. R. Baranowski/sifting litter near stream in ravine, tropical montane forest/ HOLOTYPE Agathidium hirsutum Miller and Wheeler, 2003 [red label with black line border]’’. Only a single specimen is known of this species.

TYPE LOCALITY: Guatemala, 5 km E Antigua Guatemala.

DIAGNOSIS: This species is similar to other members of the A. aztec subgroup with a small male metafemoral tooth (fig. 151), moderately large eyes, and general lack of distinctive modifications. This species has an extremely large, setose male metasternal fovea that is very conspicuous. The male genitalia are also diagnostic with the operculum moderately broad and apically slightly emarginate (fig. 284).

DESCRIPTION: Body moderately large (TBL = 2.35 mm), broad, robust (PNW/TBL = 0.56), strongly contractile.

Head red; pronotum dark red; elytra dark red, not iridescent; venter yellow­brown, antennae and palpi yellow; legs yellow to yellow­brown.

Head broad (MDL/OHW = 0.52), dorsal surface flattened, dorsoventrally compressed; with very fine punctures, each with a short, very fine seta, surface between punctures shiny, smooth; frontoclypeal suture obsolete medially; eyes prominent, not compressed, finely faceted; gula slightly concave; antennomere ratios: length I:II:III = 2.0:1.0:2.0, width VII:VIII:IX = 1.0:1.0:1.9. Pronotum very large, broad (PNL/PNW = 0.58), strongly convex, anterolateral lobes strongly produced, lateral margin broadly curved, not angulate; with very fine, sparse punctures, each with a short, very fine seta, surface between punctures smooth. Elytra broad, lateral margins strongly rounded, apically rounded (SEL/ELW = 0.87); punctation similar to pronotum; sutural stria present in apical onefourth of elytron. Flight wings present, fully developed. Mesosternum broad, flattened; medial carina present and well developed. Metasternum moderately narrow (MTL/ MTW = 0.12), relatively strongly concave, sloping dorsad anteriorly; oblique femoral carinae moderately prominent, low and concave where meeting medially.

Male tarsi 5­5­4; pro­ and mesobasotarsomeres slightly laterally expanded, with small ventral field of spatulate setae; mandibles not modified; metafemur moderately broad with small posteroapical tooth (fig. 151); metasternal fovea exceptionally large, rounded, medial, with very large cluster of long, dense, fine setae. Median lobe in lateral aspect moderately slender, moderately long, strongly curved basally, relatively straight thereafter, expanded submedially on dorsal margin and with lateral carinae between which is a sulcus which receives the lateral lobe, apical portion directed slightly dorsally, evenly curved, slender throughout length, apex sharply pointed (fig. 286); in ventral aspect slender, slightly constricted medially, distinctly expanded submedially by lateral carinae, apical portion broad basally, narrowed to constricted neck, thereafter slightly expanded and apex rounded (figs. 284, 285); operculum long and with lateral margins broadly curved in ventral aspect, with apex slightly expanded laterally and with small apical emargination (fig. 284); lateral lobes slender, strongly curved basally, apically expanded and strongly sinuate, apex narrowly rounded with 2 subapical stout setae (fig. 287).

Female not examined.

ETYMOLOGY: Named from the Latin word hirsutus, meaning ‘‘hairy’’, for the setose metasternum in this species.

DISTRIBUTION: This species is known only from the type locality in Guatemala (fig. 367).

DISCUSSION: The single type specimen was collected from ‘‘litter near a small stream in tropical montane forest’’ at 1780 m elevation.

Figures

Figs. 145–172. Agathidium oniscoides­group species, left male metafemur, ventral aspect: 145, A. oculeum. 146, A. recurvatum. 147, A. impensum. 148, A. cheneyi. 149, A. tenangoense. 150, A. rumsfeldi. 151, A. hirsutum. 152, A. cortezi. 153, A. tumidiventre. 154, A. aztec. 155, A. iridescens. 156, A. dentigerum. 157, A. stephani. 158, A. akrogeneios. 159, A. appalachium. 160, A. pocahontasae. 161, A. carolinense. 162, A. gallititillo. 163, A. divaricatum. 164, A. bushi. 165, A. georgiaense. 166, A. chauliodoum. 167, A. microphthalmum. 168, A. nimbosilva. 169, A. oniscoides. 170, A. rubellum. 171, A.

Figs. 261–287. Agathidium oniscoides­group species, aedeagus: 261–263, A. oaxacaense: 261, ventral; 262, median lobe, lateral; 263, left lateral lobe, lateral. 264–266, A. oculeum: 264, ventral; 265, median lobe, lateral; 266, left lateral lobe, lateral. 267–269, A. recurvatum: 267, ventral; 268, median lobe, lateral; 269, left lateral lobe, lateral. 270–272, A. impensum: 270, ventral; 271, median lobe, lateral; 272, left lateral lobe, lateral. 273–276, A. cheneyi: 273, ventral; 274, median lobe, apex, ventral; 275, median lobe, lateral; 276, left lateral lobe, lateral. 277–279, A. tenangoense: 277, ventral; 278, median lobe, lateral; 279, left lateral lobe, lateral. 280–283, A. rumsfeldi: 280, ventral; 281, median lobe, apex, ventral; 282, median lobe, lateral; 283, left lateral lobe, lateral. 284–287, A. hirsutum: 284, ventral; 285, median lobe, apex, ventral; 286, median lobe, lateral; 287, left lateral lobe, lateral.

Figs. 367, 368. Geographic distribution of Agathidium oniscoides­group species: 367, A. hirsutum = -; A. tenangoense = •; A. iridescens = ^; A. rumsfeldi = *. 368, A. aztec = ^; A. cortezi = *; A. tumidiventre = •.