Troglonethes olissipoensis Reboleira & Taiti, 2015
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publication ID |
https://doi.org/ 10.5852/ejt.2015.161 |
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publication LSID |
lsid:zoobank.org:pub:2297E4A3-D279-4D0A-923C-D5E0D5DCB3C0 |
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DOI |
https://doi.org/10.5281/zenodo.3815795 |
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persistent identifier |
https://treatment.plazi.org/id/20E366DB-7D84-429D-A97E-DEE7A397726E |
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taxon LSID |
lsid:zoobank.org:act:20E366DB-7D84-429D-A97E-DEE7A397726E |
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treatment provided by |
Carolina |
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scientific name |
Troglonethes olissipoensis Reboleira & Taiti |
| status |
sp. nov. |
Troglonethes olissipoensis Reboleira & Taiti View in CoL sp. nov.
urn:lsid:zoobank.org:act:7E09D1C5-19F8-44DF-A1AE-B2D741C411AE
Figs 13 View Fig A–G, 14A–E, 15A–D
Diagnosis
A species of Troglonethes characterised by the antenna having five flagellar articles, the male pleopod 1 exopod triangular, as wide as long, and the male pleopod 2 endopod with the distal article bearing a basal and a distal hook-like process.
Etymology
The new species is named after Olissipo, the old name of Lisbon, on the peninsula of which the Gruta de Alvide is located.
Material examined
Holotype
PORTUGAL: ♂, Gruta da Alvide, Cascais, Lisbon Peninsula , 26 Dec. 2009 ( MZUF). Paratypes
PORTUGAL: 5 ♂♂, 2 ♀♀, 3 juvs, same data as holotype ( MZUF); 5 ♂♂, 2 ♀♀, same data as holotype ( SR); 5 ♂♂, 2 ♀♀, same data as holotype ( ZMUC).
Description
Maximum size: ♂ 3.5 × 0.8 mm; ♀ 4.2× 1.2 mm. Body colourless and elongated ( Fig. 13A View Fig ). Dorsum of cephalon and pereon granulated; each granule equipped with a triangular scale-seta ( Fig. 13B View Fig ); pleon and telson smooth. Cephalon ( Fig. 13 View Fig C–D) with quadrangular frontal lateral lobes slightly protruding outwards. Eyes absent. Pereonites 1–4 ( Fig. 13A View Fig ) with rounded posterior corners; pereonites 5–7 ( Fig. 13A View Fig ) with epimera pointing backwards. Pleon ( Fig. 13A, E View Fig ) narrower than pereon; pleonites 3–5 with small epimera and very short posterior points. Telson ( Fig. 13E View Fig ) about twice as wide as long, with distal part trapezoidal with concave sides. Antennula ( Fig. 13F View Fig ) with three articles; third article with spine and three long aesthetascs at apex. Antenna ( Fig. 13G View Fig ) with third, fourth and fifth article of peduncle with distinct tubercles bearing scale-setae; fifth article as long as flagellum; flagellum with five articles, with two long aesthetascs on second and third article. Mandibles ( Fig. 14 View Fig A–B) with one penicil on the right and three on the left. Maxillula ( Fig. 14C View Fig ) with inner branch bearing three penicils at apex, inner one distinctly longer than other two; outer branch with 12 teeth and thin, setose stem among outer group of teeth. Maxilla ( Fig. 14D View Fig ) apically bilobed and setose, with outer and inner lobes subequal; inner lobe with several long stout setae along margin. Maxilliped ( Fig. 14E View Fig ) endite triangular, with stout triangular penicil at apex; palp distally rounded, with long setae, basal article with two short, compound setae. Uropod ( Fig. 13E View Fig ) with exopod slightly longer than endopod and more distally inserted; exopod with several long pointed setae and endopod with a long and a short seta at apex.
MALE. Pereopod 1 ( Fig. 15A View Fig ) with no particular modifications. Pereopod 7 ( Fig. 15B View Fig ) ischium with straight sternal margin, carpus with row of scales on distal margin, and propodus with long, thin setae on distal half of tergal margin. Genital papilla ( Fig. 15C View Fig ) fusiform, with rounded apex, much longer than pleopod 1. Pleopod 1 ( Fig. 15C View Fig ) exopod triangular, as wide as long, with broadly rounded apex; endopod with basal article elongated, longer than exopod, with sinuous outer margin, distal article flagelliform with setose apex. Pleopod 2 ( Fig. 15D View Fig ) exopod triangular, with broadly rounded apex with few short setae; endopod biarticulated, basal article about three times as long as distal one, with parallel sides, distal article with outer margin bearing hook-like process at base and one at apex.
Remarks
The genus Troglonethes was erected by Cruz (1989) for the new species T. aurouxi from a cave north of Valencia, Spain. Tabacaru (1993) included the genus in the tribe Speleonethini . The new species from Portugal is included in the genus since it has all the characters listed in the diagnosis. Troglonethes olissipoensis Reboleira & Taiti sp. nov. differs from T. aurouxi in having an antennal flagellum with five, instead of four, articles, the male pleopod 1 exopod shorter than the basal article of the endopod, and the male pleopod 2 endopod with a basal hook-like process on the outer margin of the distal article.
Ecological notes
This species was only found in Gruta de Alvide, located in an overurbanized area, with part of the cave ceiling used as the base of a residential building. The specimens were collected in the deepest parts of the cave, the so-called third level. It is the second troglobiotic species from karst caves in the Lisbon Peninsula, after the record of the bristletail Coletinia sp. in Gruta de Colaride ( Reboleira et al. 2012 a). Unidentified springtails and blaniulid millipedes were also collected.
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