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Scarabaeoidea of Southern South America Links |
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Scarab Guide Links
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Classification |
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Tesserodoniella meridionalis Vaz de Mello
and Halftter
Tesserodoniella meridionalis Vaz de Mello and Halftter 2006:65. |
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Tesserodoniella meridionalis,
head.
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Tesserodoniella meridionalis,
parameres. |
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Map of central Chile showing distribution of Tesserodoniella elguetai (circles)
and T. meridionalis (triangles). |
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Holotype:
male. CHILE: VII Región del Maule: Constitución, Pantanillos, 17 December 2003,
"Tramp barber bosque de Nothophagus (sic) glauca", leg. W. Navarrete leg. (MNNC). |
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Paratypes:
4 males, 2 females. CHILE: VII Región del Maule: same as holotype (2 males JMEC, 1 female MNNC, 1 male
UNSM); Constitución, Pantanillo, Empedrado, September 2002, Wilson Navarrete leg.,
barber trap. (1 male FVMC). CHILE: VIII Región del Biobío: Ñuble: Cerro Cayumanqui, 5
December 2004, 36°42'08" S, 72°30'36" W, "barber", J. Mondaca E. leg. (1 female CMNC). |
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Description: Holotype male. Head (Fig. 6) clypeus with two elongated triangular teeth separated by
U-shaped emargination; each tooth with small, obtuse, external lobe. Clypeo-genal border
sharply angulate. Dorsal eye surface ovoid, twice as long as wide; interocular region more
than 15 eye widths wide. Prothorax rhomboidal, almost one and a half times wider than
long. Median longitudinal line absent. Posterior angles completely rounded. Elytra
with discal striae weak but conspicuous. Interstriae with small rounded shiny spots on
microgranulated surface. Seventh interstria with conspicuous discal tubercle, tubercle
located where seventh interstria meets sixth. Fifth interstria with tubercle in apical third,
third and fourth interstriae each with one conspicuous apical tubercle. Lateral carina
absent, but pseudoepipleuron conspicuously delimited. Legs. Protibia internally curved
with external border bearing three conspicuous and apically narrowed teeth, internal
border with apical tooth directed forward and downward. Metaemur with posterior
ventral carina subapically forming rounded lobe. Internal border of metatibiae without
tubercles. Venter with mesosternum approximately twice as long as wide. Pygidium with
basal sulcus obtusely angulate medially. Parameres (Fig. 9) half the length of phallobase. |
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Variation:
Paratypes vary in size (5.1-6.1 mm) and width (widest at prothorax: 3.2-4.1 mm).
Females differ from males in the following respects: protibial teeth wider and stronger,
apical internal tooth almost lacking; hind femur with posterior apical lobe rounded;
metatibia straighter and more widened apically, external serrations less conspicuous;
abdominal ventrite 5 feebly narrowed medially. |
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Remarks:
Specimens were caught in a region originally covered by Nothofagus forests, and both
sclerophyllous (in arid areas) and hygrophyllous riparian vegetation. This distribution is
within the Maule Biogeographical Province (as defined by Morrone 2001, 2006). The
northernmost distributions of austral biotic elements are found in this region (see map). |
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Excerpt from:
Vaz de Mello, F. Z., G. Halffter. 2006. A new dung beetle genus with two new species from Chile
(Coleoptera: Scarabaeidae: Scarabaeinae). Zootaxa 1193: 59-68 |
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