Rumilara riberai, 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/7B43FDD9-535D-4D13-A19F-87573BF05C93 |
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taxon LSID |
lsid:zoobank.org:act:7B43FDD9-535D-4D13-A19F-87573BF05C93 |
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treatment provided by |
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scientific name |
Rumilara riberai |
| status |
sp. nov. |
3.2.5. Rumilara riberai sp. nov.
Figs 2c View Figure 2 , 3c View Figure 3 , 5c View Figure 5 , 6c View Figure 6 , 7c View Figure 7 , 8c View Figure 8 , 9c View Figure 9 , 10f View Figure 10 , 13 View Figure 13
Material examined.
Type material: Holotype ♂ (PUCE) " Ecuador, Santo Domingo de los Tsáchilas prov., Otongachi env., tributary of Rio Toachi , 00°19′59.7″ S, 78°56′26.6″ W, 917m a.s.l., 11.8.2013, stream ca 10m wide, with sand, gravel, boulders, Čiampor Jr & Čiamporová-Zaťovičová lgt." GoogleMaps ; Paratypes 6♂♂, 1♀ (CCB), 3 ex with the same data as the holotype GoogleMaps ; 4♀♀, 6 ex " Ecuador, Santo Domingo de los Tsáchilas prov., Otongachi env., next to the tributary of Rio Toachi , 00°19′50.5″ S, 78°56′41.6″ W, 914m a.s.l., 11.8.2013, very shallow stream running along a rock covered by periphyton, Čiampor Jr & Čiamporová-Zaťovičová lgt." GoogleMaps Other material: 13 larvae with the same data as the holotype GoogleMaps ; 6 larvae " Ecuador, Santo Domingo de los Tsáchilas prov., Otongachi env., next to the tributary of Rio Toachi , 00°19′50.5″ S, 78°56′41.6″ W, 914m a.s.l., 11.8.2013, very shallow stream running along a rock covered by periphyton, Čiampor Jr & Čiamporová-Zaťovičová lgt." GoogleMaps ; 1 larva " Ecuador, Santo Domingo de los Tsáchilas prov., Otongachi env., tributary of Rio Toachi , 00°19′34.0″ S, 78°56′59.1″ W, 852m a.s.l., 11.8.2013, wild river ca 20m wide, fast flowing, with large boulders, Čiampor Jr & Čiamporová-Zaťovičová lgt." GoogleMaps .
Adult diagnosis.
The species can be distinguished by a combination of following characters: 1) head only partially clothed by pubescence, clypeus bare; 2) femora bare or with a row of dark, long hairs on dorsal margin; 3) elytra without dense pubescence; 4) aedeagus with rod-like sclerite; 5) parameres only feebly asymmetrical.
Adult diagnostic description.
Male. Colour: Body (Figs 2c View Figure 2 , 3c View Figure 3 ) black; lateral sides of femora and tibiae brown; tarsal claws pale brown with reddish tincture. Pubescence: Head behind eyes clothed with short, prone pubescence. Elytra very readily covered by short, recumbent pubescence, and with numerous moderately long, curved, semi-erect, hair-like setae. Femora with long, dark, densely set, hair-like setae near dorsal margin; pro- and metatibiae apically with a fringe of long, dark, hair-like setae on inner margin; mesotibiae without pubescence. Metaventrite readily clothed with short, prone pubescence. Surface: Head, clypeus and pronotum densely punctate. Elytra with rows of punctures moderately deeply impressed; third interval slightly elevated in anterior 1/5; remaining intervals nearly flat. Prosternal process (Fig. 7c View Figure 7 ) moderately wide, concave between procoxae, then subtriangular with rounded apex. Aedeagus (Figs 13a-c View Figure 13 ) with long, dorsal, rod-like sclerite on penis; parameres asymmetrical, left one slightly longer. - Female externally similar to male, except slightly larger.
Measurements.
♂ - CL: 2.16-2.53 mm; PL: 0.56-0.65 mm; PW: 0.71-0.79 mm; EL: 1.60-1.88 mm; EW: 0.83-0.97 mm. ♀ - CL: 2.68-2.69 mm; PL: 0.68-0.70 mm; PW: 0.82-0.85 mm; EL: 1.99-2.00 mm; EW: 1.04-1.06 mm.
Variation.
The greatest differences were observed in distribution of pubescence (mainly on legs, around eyes, partly on pronotum and elytra) due to its often removal.
Etymology.
Named after Ignacio Ribera Galán a great expert on systematics, phylogeny, evolution, biogeography, and conservation of water beetles, who untimely passed away.
Larva
(Fig. 9c View Figure 9 ) with length 2.92-2.96 mm, greatest width 0.96-0.99 mm. Pleurites on abdominal segments 1-5. Abdominal segments 1-6 explanate. Surface around the frontal pair of pronotal gibbosities of the same colour as the rest of pronotum. Tergum of abdominal segments 1-7 with a pair of distinct, longitudinally arranged small gibbosities.
Distribution.
Known from three localities in Santo Domingo de los Tsáchilas Province (Figs 16c-d View Figure 16 ).
Remarks.
Several paratypes are markedly smaller than the rest (including holotype), however, they agree in all diagnostic characters.
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