Rumilara, Linský & Čiamporová-Zaťovičová & Laššová & Čiampor Jr, 2022
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publication ID |
https://dx.doi.org/10.3897/asp.80.e84013 |
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publication LSID |
lsid:zoobank.org:pub:4A6669D5-7DDD-4AE0-A8B4-55724B9C594A |
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persistent identifier |
https://treatment.plazi.org/id/111B1F47-F9E2-4654-B112-17B9ACC6D77A |
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taxon LSID |
lsid:zoobank.org:act:111B1F47-F9E2-4654-B112-17B9ACC6D77A |
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treatment provided by |
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scientific name |
Rumilara |
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gen. nov. |
3.2.2. Rumilara gen. nov.
Type species.
Rumilara obscura sp. nov.
Diagnosis.
A new genus is recognized by the combination of the following characters: compact structure of antennae (Fig. 5a-e View Figure 5 ); mandibles with teeth fused (Fig. 4b View Figure 4 ); surface of pronotum microreticulate, with complete transverse impression before middle, outline of discal area elevated, partially or fully interrupted medially by a prescutellar indentation (Fig. 6 View Figure 6 ), mesotibiae without pubescence on lateral sides, without tubercle on inner apex in males; fourth tarsomere with apicoventral, long, erect seta; abdomen convex, with apical segment rounded in both sexes (Fig. 8 View Figure 8 ).
Description.
Body elongate (Figs 2 View Figure 2 - 3 View Figure 3 ), 2.44-3.28 mm long, subparallel, widest near posterior fifth of elytra (EW), 0.83-1.37 mm wide, dorsum moderately convex. Dorsal surface covered, at least partially, with two types of setae: 1) short, prone, more or less densely pubescent, and 2) numerous moderately long, curved, semi-erect, hair-like. Ventral surface clothed with yellowish, densely set, short to moderately long, recumbent pubescence that is confined partly or fully to following areas: genae, ventral face of head, hypomera, epipleura, prosternum, mesoventrite, metaventrite, abdomen, coxae, trochanters, femora, tibiae and tarsi. Head narrower than pronotum, retractile, dorsally moderately convex, laterally rounded, ventrally nearly flat. Surface microreticulate, with fine sparse or very dense punctation partly or fully concealed by pubescence. Eyes well developed, hemispherical; with row of long, hair-like setae along dorsal margin (often peeled off in R. riberai sp. nov. and R. suppressa sp. nov. specimens). Labrum about 3 times wider than long; transverse; with row of long, yellowish, hair-like setae near anterior margin; anterolateral angles rounded; surface glabrous; anterior margin feebly emarginate medially. Clypeus shorter than labrum, transverse, surface microreticulate, fully or not at all concealed by pubescence, anterior margin with a row of moderately long, hair-like setae; frontoclypeal suture straight. Antennae (Fig. 5a-e View Figure 5 ) 11-segmented; clubbed, club ca. twice as long as combined length of scape and pedicel. Scape curved, ca. 1.5 times as long as pedicel; pedicel subglobular. Segment 3 subtriangular, longer than wide; segment 4 about as long as wide; segments 5 to 10 wider than long, transverse; segment 11 about as long as wide, subglobular. All segments densely clothed with short, prone setae; scape and pedicel also with long, stout, hair-like setae; segments 5 to 11 with a few erect, hair-like setae. Mandible (Fig. 4b View Figure 4 ) short, moderately broad, nearly symmetrical with apical teeth fused; outer lateral margin strongly curved at base with a few long, curved, hair-like setae; ventral condyle bearing row of long, hair-like setae; molar part large, finely grooved. Prostheca hyaline, long, with numerous apical finger-like outgrowths. Maxilla (Fig. 4c View Figure 4 ) with cardo densely clothed with hair-like setae; stipes subtriangular, with moderately long, densely arranged, hair-like setae; palpifer nearly half as long as stipes, with moderately long, hair-like setae on external face, and with long, hair-like setae near anterior margin. Maxillary palpi 4-segmented; surface of segments 2 and 3 obscured by densely arranged, moderately long, hair-like setae; segment 1 very short, about as long as wide; segment 2 about twice as long as wide, widening apically; segment 3 slightly longer than the previous segment; terminal segment longest. Galea elongate, external outline convex, inner outline concave; apex rounded, with numerous slightly longer, finger-like setae; outer outline densely clothed with long, hair-like setae. Lacinia about twice as wide as galea, longer than wide, subrectangular; clothed with long, densely arranged, hair-like setae and apically with transverse rows of stout, bent, finger-like setae. Labium (Fig. 4d View Figure 4 ) with palpiger short, clothed with tuft of very long, densely set, hair-like setae. Labial palpi 3-segmented; segments 1 and 2 subequal in length, with tuft of conspicuous, long, hair-like setae; terminal segment largest, suboval, widest apically, apex truncate, with a field of short, finger-like setae. Ligula almost as long as palpi, widest anteriorly; anterolateral angles broadly rounded; anterior and anterolateral margin with densely arranged, moderately long, curved, hair-like setae; medial portion covered with short, stout, finger-like setae. Prementum short, transverse, widest posteriorly; mentum longer then prementum, densely clothed with long, semi-erect, hair-like setae. Thorax. Pronotum (Fig. 6 View Figure 6 ) wider than long, subparallel, widest near middle; disc convex, posteriorly to transverse impression distinctly elevated, partially of fully interrupted medially by prescutellar indentation, surface microreticulate; with broad transverse impression in anterior third; sublateral carinae absent; with arcuate impression near posterolateral sides; anterior margin arcuate; anterolateral angles rounded; lateral margins almost straight in anterior third then broadly rounded; posterior margin trisinuate, broadly arcuate on each side and narrowly in front of scutellum; posterior angles suborthogonal. Surface microreticulate (feebly visible in R. leleupi comb. nov.). Hypomeron widest in anterior third, then distinctly narrowed, almost straight. Prosternum (Fig. 7 View Figure 7 ) extremely short in front of procoxae; procoxae strongly transverse in lateral view; prosternal process wide; parallel-sided between procoxae, then straight or concavely tapering towards rounded apex. Mesoventrite short and wide, with deep narrow groove for reception of prosternal process. Metaventrite slightly wider than long, moderately smooth, disc convex with a narrow longitudinal impression on midline. Elytra elongate, parallel or finely subparallel, widest in posterior 4/5, then evenly arched towards rounded apex. Each elytron with 10 rows of shallowly to deeply impressed punctures. Intervals nearly flat, slightly elevated or partly depressed. Scutellum wider than long, rounded. Epipleuron oblique until posterior margin of metaventrite then inflexed horizontally, posteriorly tapering, not reaching elytral apex. Hind wing without radial cross vein; without anal cell; with first and second branches of anal vein 2 fused; anal vein 1 present only apically; cubito-anal cross vein incomplete or complete and joining cubitus to anal vein 1. Legs long, at least partially covered by pubescence; femora widest across middle; tibiae moderately bent, subequal in length with femora. Tarsi 5-segmented, fourth segment with an apicoventral, long, erect seta, fifth segment slightly shorter than remaining segments combined; claws strong, long, without basal or subbasal teeth. Abdomen (Fig. 8 View Figure 8 ) with 5 ventrites; first ventrite with intercoxal process subtriangular, about twice as wide as long, feebly incissed medially; ventrites 2-4 gradually shorter and slightly narrower than previous one; posterior margin of ventrite 5 broadly rounded. Male. Sternite VIII (Figs 11e View Figure 11 , 12e View Figure 12 , 13e View Figure 13 , 14d View Figure 14 , 15d View Figure 15 ) with long, rather wide medial apodeme; apically broadly bisinuate, densely set with moderately long, curved, semi-erect, hair-like setae. Aedeagus of trilobate type; long and slender; penis long, tapering apically, corona present, with or without long, dorsal, rod-like sclerite, membranous sack with one smaller and one large, oblong ventral sclerites; parameres feebly to strongly asymmetrical, reaching from below half to 4/5 of penis; phallobase longer than penis. Female. Sternite VIII (Figs 11f View Figure 11 , 12f View Figure 12 , 13f View Figure 13 ) with long, narrow, medial apodeme; apically broadly bi- or quadrisinuate, densely set with moderately long, curved, semi-erect hairs. Ovipositor (Figs 11d View Figure 11 , 12d View Figure 12 , 13d View Figure 13 ) with coxites and styli short; coxites broad at base; struts long and slender.
Etymology.
The name of the genus is inspired by the language of the indigenous Quechua people who live in the territory where the new genus originated. In the Quechua language ( Gómez Rendón 2009), " rumi " means rock, referring to the nature of the type locality and other habitats of the species, i.e., steep rocks with water flowing in thin layer, or fast-flowing streams with bottoms composed largely of larger rocks. The adjective ' lara ' refers to type-genus of the subfamily Larainae . Gender feminine.
Distribution.
The genus is distributed in central Ecuador, so far known from four provinces (Cotopaxi Province, Napo Province, Morona-Santiago Province, Santo Domingo de los Tsáchilas Province).
Comparative notes.
The new genus is the closest to Hexanchorus , both share a combination of following synapomorphies which separate them from remaining Larainae genera: smaller body size (length never reaches 5 mm); pronotum with distinct transverse impression in anterior half; hind wing venation without anal cell; apex of fourth tarsal segment ventrally with a fine nearly erect seta; and membranous sac of penis with laterally placed fibula. Adults of Rumilara gen. nov. differs from Hexanchorus mainly in: (i) microreticulate pronotum (Fig. 6 View Figure 6 ) (less distinct in R. leleupi comb. nov.); outline of discal area elevated (nearly flat in Hexanchorus ); discal area partially to fully interrupted by prescutellar indentation in middle (medial impression only superficial in Hexanchorus ); transverse impression shifted more to the middle (anterior third in Hexanchorus ); (ii) mesotibiae without pubescence (e.g., Figs 3c-e View Figure 3 ) on lateral sides, without tubercle on inner apex (lateral pubescence is present in all Hexanchorus species, all males have tubercle on inner apex); (iii) abdomen (Fig. 8 View Figure 8 ) with fifth ventrite apically rounded, ventrites convex (in Hexanchorus fifth ventrite is apically emarginate in both sexes, male has ventrites impressed, female convex); (iv) male genitalia (Fig. 10f View Figure 10 ) with fibula major and minor (only major in Hexanchorus ), some species with dorsal fibula (rod-like sclerite unknown in Hexanchorus ); (v) antennae (Figs 5a-e View Figure 5 ) more compact, almost club-like (more loosely connected in Hexanchorus ; Figs 5f-t View Figure 5 ), and (vi) mandibula (Fig. 4b View Figure 4 ) with apical teeth fused (as opposed to three apical teeth present in Hexanchorus ; Fig. 4a View Figure 4 ).
Remark.
Three Rumilara gen. nov. species ( R. obscura sp. nov., R. riberai sp. nov., R. suppressa sp. nov.) differ from R. paterna sp. nov. and R. leleupi comb. nov. by femoral pubescence, which is restricted to long, dark, densely set, hair-like setae along dorsal margin, and by pro- and metatibial pubescence that is in a form of fringe at tibial apex.
Included species.
Rumilara leleupi comb. nov., R. obscura sp. nov., R. paterna sp. nov., R. riberai sp. nov., R. suppressa sp. nov.
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