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Systematics of the seed beetle genus Decellebruchus Borowiec, 1987 (Coleoptera, Bruchidae).

Nápoles JR - Zookeys (2016)

Bottom Line: Keys to species, descriptions, synonymy, host plants, and geographical distributions are presented for the three species in the genus Decellebruchus (Borowiec 1987); of those, Decellebruchus walker (Pic 1912) was the only species included at the time of the genus denomination, Decellebruchus atrolineatus (Pic 1921) is transferred to this genus, and Decellebruchus lunae is described as a new species.The shortest and most parsimonious phylogenetic tree for genera with pectinate antennae had a length of 33, consistency index 87, and retention index 81.

View Article: PubMed Central - HTML - PubMed

Affiliation: Especialidad de Entomología y Acarología, Postgrado en Fitosanidad, Colegio de Postgraduados, Montecillo, Estado de México, MEXICO.

ABSTRACT
Keys to species, descriptions, synonymy, host plants, and geographical distributions are presented for the three species in the genus Decellebruchus (Borowiec 1987); of those, Decellebruchus walker (Pic 1912) was the only species included at the time of the genus denomination, Decellebruchus atrolineatus (Pic 1921) is transferred to this genus, and Decellebruchus lunae is described as a new species. The shortest and most parsimonious phylogenetic tree for genera with pectinate antennae had a length of 33, consistency index 87, and retention index 81.

No MeSH data available.


Female habitus of Decellebruchusatrolineatus; a dorsal view b lateral view.
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Figure 4: Female habitus of Decellebruchusatrolineatus; a dorsal view b lateral view.

Mentions: Male (Fig. 1a–b). Length (pronotum-elytra): 2.4–2.6 mm; width: 1.4–1.6 mm; maximum thoracic depth 1.5–1.7 mm. Color: Antennae with the first three segments yellowish, the rest dark or partially dark; head, prosternum, metasternum, base of meso-femur and meta-femora, and coxae dark; pronotum with two longitudinal dark bands, which may together form a dark spot; elyton variegate; pygidium with three pairs of dark spots, two apical, two median-lateral, and two basal; rest of body yellowish. Vestiture: Body with mixed yellowish and white pubescence; scutellum with whitish pubescence; fore coxa with a tuft of white setae; pygidium with yellowish and whitish pubescence forming a variegate pattern. Head: Short and broad, densely micropunctulate, frons with a strong median carina, distance between eyes 2.3.–3.3× as wide as eye width, eye cleft 0.60–0.71× its length by ocular sinus, posterior margin of eye protruding from adjacent surfaces, postocular lobe rounded and setose; distance from base of antennae to apex of labrum 0.39–0.55× as long as distance from upper limits of eyes to apex of labrum; antennomeres I–III filiform, IV subserrate, V–XI pectinate; antennomere II 2.8–3.8× as long as antennomere XI; antennomere VII 4.4–5.6× wider that long; antenna extending slightly beyond humerus. Prothorax: Subconical, without lateral carina; densely foveolate, disc convex, slightly gibbous before scutellum and with shallow median channel; prosternal process narrow, triangular, acute, half as long as procoxae. Meso- and metathorax: Scutellum square, bidentate apically; elytral striae regular, striae 4 and 5 abbreviated basally by tubercle, humeri raised. Legs: First protarsomere 2.0–3.0× as long as second, first mesotarsomere 1.8–2.3× as long as second, first metatarsomere 2.6–3.0× as long as second; metacoxa densely punctate; hind femur constricted basally and apically, expanded medially to about width of coxa; without external carina ventrally; internal ventral carina with small subapical acuminate spine about half as long as width of tibial base; hind tibia straight, enlarged, with only mesal and ventral carinae; tibial corona with 4 spinules, mucro 0.10–0.13× as long as first tarsomere; without sinus at base of spine; first hind tarsomere with ventrolateral glabrous longitudinal carina. Abdomen: Pygidium vertical (Fig. 2); last sternite emarginate. Genitalia: Median lobe moderately long, ventral valve triangular and deeply arcuate, internal sac with many small spines or needles, without large sclerites (Fig. 3a); lateral lobes elongate, expanded at apex, cleft about 0.53 their length; basal strut an obsolete perpendicular keel (Fig. 3b). Female (Fig. 4a–b). Length (pronotum-elytra) 2.4–2.8 mm, width: 1.5–1.7 mm, Maximum thoracic depth 1.6–1.8 mm. Similar to male except antennae serrate; distance between eyes 1.8.–2.0× as wide as eye width; pygidium subvertical; last sternite not emarginate.


Systematics of the seed beetle genus Decellebruchus Borowiec, 1987 (Coleoptera, Bruchidae).

Nápoles JR - Zookeys (2016)

Female habitus of Decellebruchusatrolineatus; a dorsal view b lateral view.
© Copyright Policy - creative-commons-attribution
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4829969&req=5

Figure 4: Female habitus of Decellebruchusatrolineatus; a dorsal view b lateral view.
Mentions: Male (Fig. 1a–b). Length (pronotum-elytra): 2.4–2.6 mm; width: 1.4–1.6 mm; maximum thoracic depth 1.5–1.7 mm. Color: Antennae with the first three segments yellowish, the rest dark or partially dark; head, prosternum, metasternum, base of meso-femur and meta-femora, and coxae dark; pronotum with two longitudinal dark bands, which may together form a dark spot; elyton variegate; pygidium with three pairs of dark spots, two apical, two median-lateral, and two basal; rest of body yellowish. Vestiture: Body with mixed yellowish and white pubescence; scutellum with whitish pubescence; fore coxa with a tuft of white setae; pygidium with yellowish and whitish pubescence forming a variegate pattern. Head: Short and broad, densely micropunctulate, frons with a strong median carina, distance between eyes 2.3.–3.3× as wide as eye width, eye cleft 0.60–0.71× its length by ocular sinus, posterior margin of eye protruding from adjacent surfaces, postocular lobe rounded and setose; distance from base of antennae to apex of labrum 0.39–0.55× as long as distance from upper limits of eyes to apex of labrum; antennomeres I–III filiform, IV subserrate, V–XI pectinate; antennomere II 2.8–3.8× as long as antennomere XI; antennomere VII 4.4–5.6× wider that long; antenna extending slightly beyond humerus. Prothorax: Subconical, without lateral carina; densely foveolate, disc convex, slightly gibbous before scutellum and with shallow median channel; prosternal process narrow, triangular, acute, half as long as procoxae. Meso- and metathorax: Scutellum square, bidentate apically; elytral striae regular, striae 4 and 5 abbreviated basally by tubercle, humeri raised. Legs: First protarsomere 2.0–3.0× as long as second, first mesotarsomere 1.8–2.3× as long as second, first metatarsomere 2.6–3.0× as long as second; metacoxa densely punctate; hind femur constricted basally and apically, expanded medially to about width of coxa; without external carina ventrally; internal ventral carina with small subapical acuminate spine about half as long as width of tibial base; hind tibia straight, enlarged, with only mesal and ventral carinae; tibial corona with 4 spinules, mucro 0.10–0.13× as long as first tarsomere; without sinus at base of spine; first hind tarsomere with ventrolateral glabrous longitudinal carina. Abdomen: Pygidium vertical (Fig. 2); last sternite emarginate. Genitalia: Median lobe moderately long, ventral valve triangular and deeply arcuate, internal sac with many small spines or needles, without large sclerites (Fig. 3a); lateral lobes elongate, expanded at apex, cleft about 0.53 their length; basal strut an obsolete perpendicular keel (Fig. 3b). Female (Fig. 4a–b). Length (pronotum-elytra) 2.4–2.8 mm, width: 1.5–1.7 mm, Maximum thoracic depth 1.6–1.8 mm. Similar to male except antennae serrate; distance between eyes 1.8.–2.0× as wide as eye width; pygidium subvertical; last sternite not emarginate.

Bottom Line: Keys to species, descriptions, synonymy, host plants, and geographical distributions are presented for the three species in the genus Decellebruchus (Borowiec 1987); of those, Decellebruchus walker (Pic 1912) was the only species included at the time of the genus denomination, Decellebruchus atrolineatus (Pic 1921) is transferred to this genus, and Decellebruchus lunae is described as a new species.The shortest and most parsimonious phylogenetic tree for genera with pectinate antennae had a length of 33, consistency index 87, and retention index 81.

View Article: PubMed Central - HTML - PubMed

Affiliation: Especialidad de Entomología y Acarología, Postgrado en Fitosanidad, Colegio de Postgraduados, Montecillo, Estado de México, MEXICO.

ABSTRACT
Keys to species, descriptions, synonymy, host plants, and geographical distributions are presented for the three species in the genus Decellebruchus (Borowiec 1987); of those, Decellebruchus walker (Pic 1912) was the only species included at the time of the genus denomination, Decellebruchus atrolineatus (Pic 1921) is transferred to this genus, and Decellebruchus lunae is described as a new species. The shortest and most parsimonious phylogenetic tree for genera with pectinate antennae had a length of 33, consistency index 87, and retention index 81.

No MeSH data available.