Agathidium potosii 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 : 103-105

Agathidium potosii Miller and Wheeler ,

new species Figures 132 , 219–221, 363

TYPE MATERIAL: Holotype, Ƌ in FMNH labeled ‘‘ MEX:S.L.P. 14 mi. W Xilitla 4800̍ VI.29.73 A.Newton /leaf & log litter non­co­

niferous Liquidambar for. / HOLOTYPE Agathidium potosii Miller and Wheeler, 2003 [red label with black line border]’’.

TYPE LOCALITY: Mexico, San Luis Potosi, 14 mi W Xilitla.

DIAGNOSIS: This species is similar to A. popocatepetlae , A. hyle , and other relatively undifferentiated Mexican species. The male metafemoral tooth is small (fig. 132), the male metasternal fovea is large and transverse, the metasternum is moderately narrow, and the oblique metasternal lines are not strongly prominent and meet medially in a broad, subtriangular flange. The male aedeagus is not strongly modified (figs. 219–221). The apex of the median lobe is short, subtriangular, sharply pointed and, in lateral aspect, strongly curved apically (fig. 220). The operculum is moderately long, broad, flattened, and has the apex distinctly expanded laterally with lateral teeth (fig. 219).

DESCRIPTION: Body small (TBL = 2.22 mm), broad, robust (PNW/TBL = 0.48), strongly contractile.

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

Head broad (MDL/OHW = 0.61), 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 relatively prominent and coarsely faceted, somewhat dorsoventrally compressed; gula strongly concave in anterior half; antennomere ratios: length I:II:III = 2.1:1.0:1.5, width VII:VIII:IX = 1.0:1.0: 2.3. Pronotum very large, broad (PNL/PNW = 0.68), strongly convex, anterolateral lobes strongly produced, lateral margin broadly curved, not angulate; with very fine punctures, each with a short, very fine seta, surface between punctures shiny, smooth. Elytra broad, lateral margins strongly rounded, apically rounded (SEL/ELW = 0.93); punctation similar to pronotum; a faint sutural stria extending from apex for about one­fifth of elytral length. Flight wings strongly reduced. Mesosternum broad, convex; medial carina prominent. Metasternum moderately broad (MTL/MTW = 0.20), medial surface slightly concave, distinctly sloping dorsad anteriorly; oblique femoral carinae moderately well de­ veloped, meeting medially in broadly triangular, posteriorly directed flange.

Male tarsi 5­5­4; pro­ and mesobasotarsomeres moderately laterally expanded, with moderately large ventral field of spatulate setae; mandibles not modified; metafemur moderately broad, with prominent, small tooth subapically on posterior margin (fig. 132); metasternal fovea large, transverse, with large, prominent, dense brush of long fine setae. Median lobe in lateral aspect slen­ der, strongly curved basally, relatively straight thereafter, apical portion short, slen­ der, directed at angle dorsad, apically curved back ventrad, apex sharply pointed (fig. 220); in ventral aspect slender, slightly expanded at base of apical portion, which has the lateral margins slightly curved to broadly point­ ed apex (fig. 219); operculum flat, broad, moderately long, apex slightly expanded with lateral teeth (fig. 219); lateral lobes very slender, evenly curved basally, straight distally, apically slightly expanded and slightly sinuate, apices rounded with 2 stout setae (fig. 221).

Female tarsi 5­4­4.

ETYMOLOGY: This species is named for the type locality.

DISTRIBUTION: This species is known only from San Luis Potosi and Michoacan (fig. 363).

PARATYPES: MEXICO: Michoacan: Cerro de Garnica, Puerto Garnica, 18 Sep 1973, 9400̍, oak­pine, Berlese, A Newton (3, CNCI).

DISCUSSION: This species has been collect­ ed from pine and Liquidambar forest from 4800 to 9400 ft elevation.

Figures

Figs. 118–144. Agathidium concinnum­ and A. oniscoides­group species, left male metafemur, ventral aspect: 118, A. concinnum. 119, A. kimberlae. 120, A. vaderi. 121, A. bituberculum. 122, A. oedema. 123, A. gomezae. 124, A. hidalgoense. 125, A. skoliosternum. 126, A. erythromelas. 127, A. rhamphastes. 128, A. megoniscoides. 129, A. grumum. 130, A. triangularum. 131, A. lobosternum. 132, A. potosii. 133, A. popocatepetlae. 134, A. hyle. 135, A. stenomma. 136, A. tribulosum. 137, A. tribulograndum. 138, A. invisitatum. 139, A. multidentatum. 140, A. sejunctum. 141, A. grandidentatum. 142, A. andersoni. 143, A. disgregum. 144, A. oaxacaense. Bars = 0.5 mm.

Figs. 363, 364. Geographic distribution of Agathidium oniscoides­group species: 363, A. popocatepetlae = -; A. potosii = •; A. stenomma = *; A. tribulosum = ^. 364, A. hyle = *; A. grandidentatum = O; A. multidentatum = •; A. sejunctum = ^; A. tribulograndum = •.