Rhyacopsyche abdita, Thomson & Ríos-Touma & Holzenthal, 2025
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publication ID |
https://doi.org/10.3897/zookeys.1263.148084 |
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publication LSID |
lsid:zoobank.org:pub:0E23FDF2-B4BA-4E7C-A13D-00A52A57CAC5 |
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DOI |
https://doi.org/10.5281/zenodo.17885626 |
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persistent identifier |
https://treatment.plazi.org/id/268CA781-939D-5239-95CB-B01ADC8A9234 |
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treatment provided by |
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scientific name |
Rhyacopsyche abdita |
| status |
sp. nov. |
Rhyacopsyche abdita sp. nov.
Fig. 1 View Figure 1
Type material.
Holotype: Ecuador • ♂; Morona-Santiago, trib. to Rio Abanico, Hwy E 46 (via Riobamba-Macas) ; 02.24985°S, 078.20238°W; el. 1531 m; 26 January 2015; Holzenthal, Huisman, Ríos-Touma, Amigo leg.; in alcohol; UMSP 000113995 View Materials ; UMSP GoogleMaps . Paratypes: Ecuador • 1 ♂; Pichincha, Reserva Rio Bravo, Rio Bravo, upstream ; 0.07802°S, 078.73287°W; 19 November 2023; el. 1564 m; Holzenthal, Frandsen, Morabowen, Amigo leg.; pan trap; in alcohol; UMSP 000551404 View Materials ; UMSP GoogleMaps • 5 ♂; Imbabura, Reserva Los Cedros, tributary to Rio Los Cedros ; 00.30374°N, 078.78229°W; el. 1312 m; 18–19 October 2011 Holzenthal, Ríos, Encalada, Acosta leg.; in alcohol; UMSP 000145862 View Materials ; MECN GoogleMaps • 7 ♂; same as for preceding; UMSP 000145861 View Materials ; UMSP GoogleMaps • 8 ♂; Imbabura, Reserva Los Cedros, Rio de la Plata ; 00.32495°N, 078.78084°W; el. 1587 m; 18 October 2011; Holzenthal, Ríos, Encalada, Acosta leg.; in alcohol; UMSP 000520782 View Materials ; UMSP GoogleMaps • 1 ♂; Imbabura, Reserva Los Cedros, small stream near station ; 00.31127°N 78.78150°W; el. 1460 m; 17 October 2011; Holzenthal, Ríos, Encalada, Acosta leg.; in alcohol; UMSP 000138550 View Materials ; MECN GoogleMaps .
Diagnosis.
The form and appearance of the dorsolateral lobe, inferior appendage, and phallus of Rhyacopsyche abdita , new species, and R. intraspira Wasmund & Holzenthal, 2007 are similar. However, the prominent hook at the apex of the intermediate appendage of R. abdita , which is lacking in R. intraspira , can be used to distinguish between the two. Additionally, R. abdita has far fewer of the dark, peg-like setae on the dorsolateral lobe than R. intraspira .
Description.
Adult (male: n = 23). Forewing length 3.5–3.8 mm (male). Head unmodified, with 3 ocelli; antennae unmodified. Tibial spurs 1, 3, 4. Specimens brown in alcohol. Sternum VII with short mesoventral point. Male genitalia. Abdominal segment IX setose, anterolateral margin convex, posterolateral margin with mesal hump and bearing small digitate process with apical seta on inner surface; dorsolateral lobe of segment IX truncate and setose, in dorsal view deeply divided and with small peg-like setae on inner surface (Fig. 1 A, B View Figure 1 ). Tergum X membranous, partially retracted inside segment IX, articulating with intermediate appendage (Fig. 1 A View Figure 1 ). Intermediate appendage elongate, extending past inferior appendage, apex hook-like (Fig. 1 A, B View Figure 1 ). Inferior appendage setose, dorsal margin enlarged mesally, ventral margin sinuate; apex bearing prominent, peg-like seta (Fig. 1 A View Figure 1 ). Phallus basally tubular, elongate, thin membranous sheath surrounding middle portion covered with spicules; central tubule with preapical, geniculate projection; lateral process with darkened, hooked apex (Fig. 1 D, E View Figure 1 ).
Etymology.
Abditus, Latin for “ hidden, concealed, ” referring to the digitate projections on the inner surface of abdominal segment IX.
Distribution.
Ecuador (Table 1 View Table 1 ).
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.
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