Parallidiostoma Ocampo & Colby
publication ID |
https://doi.org/ 10.5281/zenodo.191309 |
DOI |
https://doi.org/10.5281/zenodo.6224974 |
persistent identifier |
https://treatment.plazi.org/id/03C19674-6121-EE0C-FF36-AA8CFB74CB5A |
treatment provided by |
Plazi |
scientific name |
Parallidiostoma Ocampo & Colby |
status |
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Parallidiostoma Ocampo & Colby new genus
( Figs. 1–6 View FIGURES 1 – 3 View FIGURES 4 – 6 )
Type species: Parallidiostoma tricornum Ocampo & Colby , here designated.
Diagnosis. Parallidiostoma is distinguished from Allidiostoma by the following combination of characters: in Parallidiostoma the prontoum is nearly as long as it is wide (ratio 0.95) (in Allidiostoma the pronotum is strongly transverse, ratio <0.76), Parallidiostoma lacks a membrane on anterior margin of the pronotum (in Allidiostoma the membrane is present), and Parallidiostoma has two well-developed horns on the anterior half of the pronotum (only males are known) (in males and females of Allidiostoma the pronotum is unarmed).
Description. Coleoptera : Scarabaeidae : Allidiostomatinae . Color reddish brown. Form: Body convex oval, length 8.2-8.3 mm. Pygidium not exposed beyond apices of elytra. Head ( Figs. 1–3 View FIGURES 1 – 3 ): Surface punctate. Frons convex, armed with median horn. Frontoclypeal suture evident. Eye canthus setigerous; setae moderate in length, thick. Base of declivous anterior edge of clypeus with fringe of short, slender setae. Labrum slightly protruding beyond clypeal anterior margin, small, rounded. Mandibles developed, protruding beyond clypeus and labrum. Maxilary palps with 4 palpomeres. Labium ventrally setose, setae long, slender; labial palps with 3 palpomeres. Antenna with 9 antennomeres, club with 3 small, tomentose antenommeres. Pronotum ( Figs 1–3 View FIGURES 1 – 3 ): Surface punctate. Lateral margin weakly serrulate, setigerous; setae moderate to long, inserted in troughs of serrulations. All margins beaded except basal margin on external sides. Disc with deep fovea and horns. Fovea impunctate to punctate; punctures sparse to dense, small to large. Anterior margin of pronotum lacking membrane. Scutellum: Subtriangular , apex slightly rounded. Elytra ( Fig. 1 View FIGURES 1 – 3 ): Convex. Surface smooth; with 10 punctate striae, punctures size variable. Lateral margin smooth, setose; setae long. Ve nt e r: Prosternal surface smooth, not setigerous; prosternum setigerous at base and apex, smooth otherwise. Posterior prosternal process long, columnar, slender, setigerous; setae moderately long. Anterior prosternal process produced into rounded, setigerous knob; setae moderate to long. Abdominal sternites narrowed medially, setigerous. Pygidium: Not exposed beyond elytra, surface densely punctate. In lateral view, surface nearly flat. Legs ( Fig. 1 View FIGURES 1 – 3 ): Profemur with fringe of long cleaning setae on anterior surface. Protibia with 3 lateral teeth. Mesotibiae and metatibiae with two tranversal carinae, carinae setose; setae thick, moderately long. Tarsal claws simple. Male genitalia ( Fig. 4 View FIGURES 4 – 6 ): Symmetrical; parameres longer than phalobase, slender.
Etymology. From the Latin par - meaning similar, in reference to the similarity and close relationship of the genera Parallidiostoma and Allidiostoma . The genus is neuter in gender.
Distribution ( Fig. 5 View FIGURES 4 – 6 ). The only known species of this genus is from Cuzco, Peru.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.