Iapir quadridentatus , Pinto, Valeria Araújo Braule, Fonseca, Claudio Ruy Vasconcelos Da & Hamada, Neusa, 2011

Pinto, Valeria Araújo Braule, Fonseca, Claudio Ruy Vasconcelos Da & Hamada, Neusa, 2011, Iapir quadridentatus sp. nov., a new torridincolid beetle from Brazil (Coleoptera: Myxophaga: Torridincolidae), Zootaxa 3031, pp. 47-53: 48-51

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http://doi.org/ 10.5281/zenodo.203765

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scientific name

Iapir quadridentatus

sp. nov.

Iapir quadridentatus  sp. nov.

( Figs. 1–13View FIGURES 1 – 13)

Type material. Holotype, male ( INPA): BRASIL, Pernambuco: Primavera / Rio Ipojuca, Cachoeira do Urubu / (08º 17 ' 55.9 " S; 35 º 21 ' 40.2 " W), / 27.viii. 2008; Neusa Hamada / Jeferson O. Silva e Lívia M. / Fusari cols. / Aderido a folhas de Mourera  sp./ ( Podostemaceae  ) [white rectangular printed label]; Holótipo 3 / Iapir quadridentatus  / Det. V.A.Braule-Pinto, 2008; [red plastic label]. Condition of holotype: intact, stored in alcohol. Paratypes (90): same data as the holotype [48 males and 37 females stored in alcohol, 1 female mounted on slides, deposited in INPA; 2 males, 2 females, deposited in MZUSP].

Diagnosis. Adult with keel extending from the frons to the gular region ( Fig. 3View FIGURES 1 – 13), left mandible bearing four teeth ( Fig. 5View FIGURES 1 – 13), male and female with a semi-lunar form between ventrites III and IV ( Fig. 11View FIGURES 1 – 13) and wings well developed ( Fig 10View FIGURES 1 – 13).

Description of the adult. Form and color: General color shiny dark brown, body convex dorsally.

Head: Short, prognathous ( Fig. 2View FIGURES 1 – 13), visible keel extending from the frons to the gular region, profiling above the eyes ( Fig. 3View FIGURES 1 – 13), rostrum visible, prominent eyes separated by a distance about twice the diameter of each eye with posterior margin sheltered by the anterior angles of the pronotum. Vertex and frons convex with smooth punctuations. Frons wide, frontoclypeal suture distinct. Antenna arising in front of eyes, with 9 antennomeres; scape globoid, pedicel short, apical antennomere as long as the first four flagelomeres combined, bearing four apical sensillae ( Fig. 4View FIGURES 1 – 13). Mandibles slightly asymmetrical ( Fig. 5View FIGURES 1 – 13): left mandible with two apical non-articulated teeth and two articulated subapical teeth, molar lobe well developed with transverse ridges covering its entire external surface, prostheca well developed with marginal setae on internal face; right mandible of similar general shape as left mandible, but bearing only 2 apical non-articulated teeth, a tuft of setae on the base of the mola and prostheca with a small set of apical setae, but no setae on the lateral face. Maxilla ( Fig. 6View FIGURES 1 – 13) with mala divided by an incomplete suture, with three apical laminar processes and 5 robust setae situated subapically; cardo short, stipes long, maxillary palpus with 3 palpomeres; palpomere 1 short, palpomere 2 three times longer than palpomere 1, palpomere 3 bearing sensillae apically. Labrum rugose and punctated in apical half, anterior margin pubescent, setae long and directed mesally. Labium ( Fig. 7View FIGURES 1 – 13) grossly punctated bearing long setae on the entire extension; prementum densely pilose with a set of central setae. Labial palpus with 3 palpomeres; palpomere 1 short spiniform setae and several punctures apically dispersed over the entire surface and one basal seta.

Thorax: Prosternum, mesoventrite and metaventrite joined in trapezoid form; prosternum with anterior region narrowed relative to base; mesoventrite seven times shorter than metaventrite. Pronotum ( Fig. 8View FIGURES 1 – 13) punctated and convex, with lateral border flat and widened, bearing marginal setae; posterior border biconcave with two short invaginations on the posterior part. Scutellar shield short, triangular with curved sides. Elytron strongly punctuated with an elliptical spot on the mediolateral portion in both sexes (seen only with open elytron), punctures arranged in 12 complete and 2 incomplete striae (the incomplete ones situated on the lateral part); humeral callus moderately protuberant.

Legs pale brown, elongated and unequal in length, dark brown on apical region of femora and at base of tibiae. Procoxa situated very close to mesocoxa. Metatrochanter ( Fig. 9View FIGURES 1 – 13) with punctuations and spines and one evident tooth on posterior margin. Femora and tibiae with a row of long setae situated on laterals, tarsal formula 4 - 4 - 4, tarsomeres 1–2 short, bearing 2 basal spines each, tarsomere 3 twice as long as tarsomere 2, tarsomere 4 long, bearing two claws.

Posterior wings ( Fig. 10View FIGURES 1 – 13) with short setae on PC+C, setae absent on the region of RA. RA 1 + 2 with short and scattered setae becoming gradually closer and longer until posterior region of the wing. ScP weak and sinuous near the margin of RA, both fused in a radial sclerotized bar, wide and strong, bifurcated at the apex. Distal extremity of RA 1 + 2 diverging to the anterior margin. Region above RA 3 + 4 reinforced by a sclerotized strip. RA 3 + 4 bifurcated and evanescent on distal portion. RA 3 wide with a spot weakly sclerotized. RA 4 and RP 2 oriented to the apex of the wing, not reaching the margin; RP 3 + 4 and MP 4 +CuA 1 + 2 weakly sclerotized, evanescent and disconnected. Cross vein r 1 well developed, bifurcated posteriorly. MP 1 + 2 strongly angular in distal fourth and sclerotized joining to rp-mp 1 and rp-mp 2 and forming a closed oblongum, evanescent on the region of rp-mp 2. AA strongly sclerotized reaching the posterior region of the wing. CU and MP 4 +CuA 1 + 2 weakly sclerotized and developed apically. AP short and sclerotized.

Abdomen: With four ventrites visible, with plastron on the first ventrite, with structure semi-lunar in form (a reduced ventrite) located between third and fourth ventrites, distal width of this structure almost reaching the lateral margin of the abdomen ( Fig. 11View FIGURES 1 – 13), fourth ventrite with a set of setae and rugosity on distal region. Aedeagus ( Fig. 12View FIGURES 1 – 13) with a developed process preceding the basal piece; parameres short, arising very close to the base of the aedeagus and ending in a very strong and pointed seta; medium lobe long, with median region thicker than its base, the apex narrowed with spines ( Fig. 13View FIGURES 1 – 13).

Length: 1.8–2.3 mm (2.2 mm in holotype).

Description of the female. Similar to male, sexual dimorphism absent in all characters examined. Body length: 2.0– 2.4 mm.

Etymology. Latin, quadri- = four; dentatus = toothed. The specific epithet is a reference to the four teeth in the left mandible ( Fig. 4View FIGURES 1 – 13).


Instituto Nacional de Pesquisas da Amazonia


Museu de Zoologia da Universidade de Sao Paulo