Troglonethes arrabidaensis 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.3815799 |
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persistent identifier |
https://treatment.plazi.org/id/78A12550-F7CA-4892-9E90-7F85446423D3 |
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taxon LSID |
lsid:zoobank.org:act:78A12550-F7CA-4892-9E90-7F85446423D3 |
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treatment provided by |
Carolina |
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scientific name |
Troglonethes arrabidaensis Reboleira & Taiti |
| status |
sp. nov. |
Troglonethes arrabidaensis Reboleira & Taiti View in CoL sp. nov.
urn:lsid:zoobank.org:act:78A12550-F7CA-4892-9E90-7F85446423D3
Figs 16 View Fig A–G, 17A–D
Diagnosis
A species of Troglonethes characterised by the antenna having three flagellar articles, the male pereopod 7 carpus enlarged in the basal part, the pleopod 1 exopod triangular, as wide as long, and the male pleopod 2 endopod with the distal article bearing an apical hook-like process.
Etymology
The new species is named after the type locality, the Arrábida karst massif.
Material examined
Holotype
PORTUGAL: ♂, Gruta do Frade , Arrábida Massif, 16 Aug. 2013 ( MZUF).
Paratypes
PORTUGAL: 3 ♂♂, 13 ♀♀, same data as holotype ( MZUF, SR and ZMUC).
Description
Maximum size: ♂ and ♀ 2.7× 0.8 mm. Body colourless and elongated ( Fig. 16A View Fig ). Dorsum of cephalon and pereonites with two rows and one row of large granules, respectively; each granule with a scale-seta ( Fig. 16B View Fig ); pleon and telson smooth. Cephalon ( Fig. 16 View Fig C–D) with short, quadrangular frontal lateral lobes. Eyes absent. Pereonites 1–3 with rounded posterior corners; pereonites 4–7 with epimera pointing backwards ( Fig. 16A View Fig ). Pleon ( Fig. 16A, E View Fig ) slightly narrower than pereon; pleonites 3–5 with small epimera and very short posterior points. Telson ( Fig. 16E View Fig ) about twice as wide as long, with distal part trapezoidal, with concave sides and broadly rounded apex. Antennula ( Fig. 16F View Fig ) with three articles; third article with three long aesthetascs at apex. Antenna ( Fig. 16G View Fig ) with fourth and fifth article of peduncle with distinct tubercles bearing scale-setae; fifth article slightly shorter than flagellum; flagellum with
three articles, with two long aesthetascs on second article. Buccal pieces as in previous species. Uropod ( Fig. 16E View Fig ) with exopod slightly longer than endopod, exopod and endopod inserted at same level.
MALE. Pereopod 1 ( Fig. 17A View Fig ) with no particular modifications. Pereopod 7 ( Fig. 17B View Fig ) ischium with straight sternal margin, carpus enlarged in basal part. Genital papilla ( Fig. 17C View Fig ) fusiform, with rounded apex, much longer than pleopod 1. Pleopod 1 ( Fig. 17C View Fig ) exopod triangular, as wide as long, with broadly rounded apex; endopod with basal article elongated, shorter than exopod, with sinuous outer margin, distal article flagelliform. Pleopod 2 ( Fig. 17D View Fig ) exopod triangular, with broadly rounded apex with few short setae; endopod biarticulated, basal article more than twice as long as distal one, with parallel sides, distal article with hook-like process at apex.
Remarks
The new species is very similar to Troglonethes aurouxi in the dorsal granulation and shape of the male pleopod 2. It differs in having the antennal flagellum with three, instead of four, articles, and a wider male pleopod 1 exopod. It is readily distinguishable from T. olissipoensis Reboleira & Taiti sp. nov. in the larger and less numerous dorsal granules, the enlarged basal part of the male pereopod 7 carpus, the male pleopod 1 endopod with the basal article shorter than the exopod, and the distal article of the male pleopod 2 endopod lacking the hook-like process at the base.
Ecological notes
This species was only found in the Gruta do Frade in the Arrábida Massif. The cave entrance is by the seashore and there are several anchialine lakes inside, influenced by the sea tides. It is the first record of troglobiotic terrestrial isopods in Arrábida.
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