Bicarinulodes, Jałoszyński, 2019
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publication ID |
https://doi.org/ 10.11646/zootaxa.4612.2.4 |
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publication LSID |
lsid:zoobank.org:pub:7525A835-B189-4F33-B17B-59D722E50951 |
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persistent identifier |
https://treatment.plazi.org/id/03EC5172-7447-2453-BBEF-FA2DB711FBC1 |
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treatment provided by |
Plazi |
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scientific name |
Bicarinulodes |
| status |
gen. nov. |
Bicarinulodes View in CoL gen. n.
Type species: Microscydmus meridensis Franz, 1988 (here designated).
Diagnosis. Body (Fig. 4) moderately stout, distinctly constricted between head and prothorax and between prothorax and elytra. Head ( Fig. 31 View FIGURES 31–34 ) about as long as broad with short but distinct tempora; tempora, vertex, genae and postgenae lacking thick bristles; occipital constriction about as broad as vertex; submentum lacking lateral sutures; hypostomal ridges present and complete, obliquely running toward posterior tentorial pits where they are not connected; antennae with trimerous club and modified in males (with antennomere VII enlarged and projecting mesad); frons with shallow frontal impression; vertex lacking posteromedian impression; head lacking longitudinal groove and median subtriangular 'platform'; setae on frons and vertex largely symmetrical; maxillary palpomere IV slightly constricted before apex, so that its apical portion is broadened and truncate; pronotum ( Fig. 31 View FIGURES 31–34 ) broadest distinctly in front of middle, with unusual set of antebasal structures: two broad submedian longitudinal carinulae and two pairs of small lateral pits; lateral and sublateral pronotal carinae absent; thick bristles on sides of pronotum absent; prosternum ( Fig. 33 View FIGURES 31–34 ) with basisternal part vestigial; prosternal intercoxal process developed as a sharply marked but weakly elevated carina; procoxal cavities closed; notosternal sutures and hypomeral ridges complete; mesoscutel- lum ( Fig. 31 View FIGURES 31–34 ) largely exposed between elytral bases; mesocoxal rests with diffuse marginal carinae; mesoventral intercoxal process ( Fig. 35 View FIGURES 35–40 ) carinate and strongly elevated, narrowly separating mesocoxae, with broadened, flattened and smooth posterior portion, well-defined posterior tip and a narrow posteromedian notch; metaventral carinae present; anterior metaventral process present, well-defined, large, not divided into subrectangular anterior and triangular posterior portions, broadly subtriangular; metaventral intercoxal process ( Fig. 35 View FIGURES 35–40 ) with a pair of long spines separated by a long and narrow notch; each elytron ( Fig. 31 View FIGURES 31–34 ) with two vestigial asetose foveae; and aedeagus ( Figs 37–40 View FIGURES 35–40 ) symmetrical with free, slender parameres.
Description. Body (Fig. 4) elongate but not very slender, distinctly constricted between head and prothorax and less so between prothorax and elytra, strongly convex, brown.
Head ( Fig. 31, 33 View FIGURES 31–34 ) with moderately large eyes; tempora short but distinct, rounded; frons impressed between antennal insertions, lacking longitudinal groove; vertex anteriorly confluent with frons, lacking posteromedian impression; numerous setae on frons and vertex largely symmetrical; gular plate ( Fig. 33 View FIGURES 31–34 ; gp) subtrapezoidal; posterior tentorial pits ( Fig. 33 View FIGURES 31–34 ; ptp) in front of transverse impression demarcating 'neck' region ventrally, minute; hypostomal ridges ( Fig. 33 View FIGURES 31–34 ; hr) complete, reaching level of posterior tentorial pits, not connected; submentum ( Fig. 33 View FIGURES 31–34 ; smn) lacking lateral sutures. Antennae (Figs 4, 31–32) slender, with distinct trimerous club, in males modified, with antennomere VII ( Fig. 32 View FIGURES 31–34 ; a7) enlarged and with a mesal subtriangular projection.
Pronotum ( Fig. 31 View FIGURES 31–34 ) bell-shaped, broadest anterior to middle; lacking lateral and sublateral carinae, with a pair of longitudinal, broad and flattened carinulae ( Fig. 31 View FIGURES 31–34 ; car) shortly in front of basal margin, and with two pairs of small antebasal lateral pits: inner ( Fig. 31 View FIGURES 31–34 ; ip) and outer ( Fig. 31 View FIGURES 31–34 ; op); transverse antebasal groove distinct, broad and diffuse, divided by carinulae into three impressions. Prosternum with vestigial basisternal region ( Figs 33–34 View FIGURES 31–34 ; bst), prosternal process carinate but weakly elevated ( Fig. 34 View FIGURES 31–34 ; psp); notosternal sutures ( Figs 33–34 View FIGURES 31–34 ; nss) complete; hypomeral ridges ( Figs 33–34 View FIGURES 31–34 : hyr) complete; inner (adcoxal) portion of hypomeron relatively narrow and glabrous, outer portion (confluent with side of pronotum) lacking thick bristles. Procoxal cavities ( Fig. 34 View FIGURES 31–34 ; pcc) closed.
Mesoventrite with a pair of transverse impressions behind its anterior ridge that function as procoxal rests ( Figs 35–36 View FIGURES 35–40 ; pcr); mesoventral intercoxal process ( Figs 35–36 View FIGURES 35–40 ; msvp) carinate, long, strongly elevated, with distinctly broadened posterior portion bearing a median flattened area ( Fig. 35 View FIGURES 35–40 ; mfa) that is smooth and devoid of setae, posterior tip of process with subtriangular emargination; mesoventrite at each side with deep dorsolateral fovea ( Fig. 36 View FIGURES 35–40 ; dlf).
Mesoscutellum ( Fig. 31 View FIGURES 31–34 ; msc) exposed between elytral bases in intact beetles, subtriangular, about as long as broad.
Metaventrite with massive subtrapezoidal anterior metaventral process ( Figs 35–36B View FIGURES 35–40 ; amtp); each side of metaventrite with metaventral carina ( Figs 35–36 View FIGURES 35–40 ; mtvc), carinae are parallel to each other; mesocoxal rests very deep and filled with setae, their posterior marginal carina diffuse but complete, postmarginal carina absent; metaventral intercoxal process ( Fig. 35 View FIGURES 35–40 ; mtvp) with long lateral spines, indistinctly separating metacoxae.
Elytra (Figs 4, 31) oval, each elytron with one pair of vestigial, asetose basal elytral foveae ( Fig. 31 View FIGURES 31–34 ; bef), lacking basal impression, and with distinct humeral callus. Hind wings developed.
Legs do not differ from other genera of Glandulariini, unmodified in males.
Abdomen unmodified, with sternites III and IV subequal in length.
Aedeagus ( Figs 37–40 View FIGURES 35–40 ) slender, weakly sclerotized, with symmetrical median lobe and symmetrical, but weakly sclerotized endophallic structures; parameres free, bearing apical setae.
Etymology. The name Bicarinulodes reflects the unique antebasal pronotal carinulae. Gender masculine.
Remarks. Bicarinulodes is more similar to Afroeudesis than to the Meridaphes - Pseudoraphes - Stenichnoconnus group of genera, but it clearly differs from all subgenera of Afroeudesis in the lack of the conspicuous subtriangular and scaly-sculptured 'platform' on the frons and vertex. Bicarinulodes has two autapomorphies, the pair of short, flat submedian carinulae on the pronotal base, and the modified antennomere VII in males. For these reasons, Microscydmus meridensis is not placed in Afroeudesis , but in a separate new genus.
Composition and distribution. Bicarinulodes comprises only its type species known to occur in Venezuela ( Fig. 41 View FIGURE 41 ).
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.