Soteriscus laouensis, Taiti & Rossano, 2015
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publication ID |
https://doi.org/ 10.1080/00222933.2015.1009512 |
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publication LSID |
lsid:zoobank.org:pub:DCBF3103-1463-4A32-9BC0-A4CFE8B762AE |
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DOI |
https://doi.org/10.5281/zenodo.4337120 |
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persistent identifier |
https://treatment.plazi.org/id/35CBF0B0-618F-4ED6-826C-ACBFDFA5FDF3 |
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taxon LSID |
lsid:zoobank.org:act:35CBF0B0-618F-4ED6-826C-ACBFDFA5FDF3 |
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treatment provided by |
Carolina |
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scientific name |
Soteriscus laouensis |
| status |
sp. nov. |
Soteriscus laouensis View in CoL sp. nov.
( Figures 21 View Figure 21 and 22 View Figure 22 )
Material examined
Holotype: ♂, St. 16, along road margin under stones, leg. S. Taiti, 28 April 2004 ( MZUF 9509 View Materials ) . Paratypes: 1 ♂♂, 35 ♀♀, same data as holotype ( MZUF 9509 View Materials ) .
Description
Maximum length: ♂, 13 mm; ♀, 16 mm. Body enlarged, outline as in Figure 21A View Figure 21 . Colour: male brown-grey with the usual yellowish muscle spots; female light brown with a marbled pattern, two darker spots per side on the anterior part of pereonites; antennae uniformly grey; pereopods pale with numerous dark spots; pleopodal exopods dark. Back smooth with some scattered short triangular scalesetae ( Figure 21B View Figure 21 ); a distinct sulcus marginalis on lateral margins of pereon epimera with numerous gland pores along its whole length ( Figure 21G View Figure 21 ); numerous gland pores scattered on the whole dorsal surface of the body; noduli laterales clearly visible, inserted more or less at the same distance from the lateral margin of the pereonites, b/c and d/c co-ordinates as in Figure 21C View Figure 21 . Cephalon ( Figure 21D–F View Figure 21 ) with no suprantennal line, frontal line straight; very small lateral lobes bent downwards and not protruding frontwards; eye with about 26 ommatidia. Pereonites 1–3 with posterior margin regularly convex; pereonite 4 with posterior margin straight; pereonites 5–6 with posterior corners pointing backwards, pereonite 7 with acute posterior corners and slightly sinuous posterior margin at sides. Pleonites 3–5 with well-developed falciform posterior points ( Figure 21H View Figure 21 ). Telson triangular with distinctly concave sides ( Figure 21H View Figure 21 ). Antennule ( Figure 21I View Figure 21 ) with first article longer than second and third; third article with a short triangular point and a tuft of elongated aesthetascs at apex. Antenna ( Figure 21J View Figure 21 ) reaching back posterior margin of pereonite 3; fifth article of peduncle almost as long as flagellum; first flagellar article about 1.5 longer than second. Buccal pieces as in the preceding species. Pleopodal exopods 1 and 2 with monospiracular covered lungs. Uropod ( Figure 21K View Figure 21 ) with a triangular depression on protopodal outer margin; exopod about twice as long as endopod; endopod proximally inserted.
Male: Carpus and distal part of merus of pereopod 1 ( Figure 22A View Figure 22 ), pereopod 2 and, to a lesser extent, pereopod 3 with a brush of pointed setae. Pereopod 7 ( Figure 22B View Figure 22 ) ischium with slightly convex sternal margin and a longitudinal depression and a setose area on rostral surface; merus elongated, without peculiar structures. Pleopod 1 ( Figure 22C View Figure 22 ) exopod with long medial lobe almost three times as long as wide, with some short setae along its margin and a broadly rounded apex; endopod with distal part with almost parallel sides and a tuft of short setae at apex. Pleopod 2 ( Figure 22D View Figure 22 ) endopod distinctly longer than exopod. Pleopod 3–5 exopods as in Figure 22E–G View Figure 22 .
Etymology
The species is named after the Oued Laou basin, where the specimens were collected.
Remarks
In having the male pleopod 1 exopod with a long medial lobe S. laouensis is similar to S. gaditanus , S. fuscovariegatus and S. gibbosus sp. nov. It is readily distinguishable from S. gaditanus in having the male pleopod 1 exopod with broadly rounded instead of triangular apical part and shorter uropodal exopods; from S. fuscovariegatus in the less protruding lateral lobes of cephalon (see Figure 3A View Figure 3 in Vandel 1956b) and comparatively longer and thinner uropods; and from S. gibbosus in lacking the hump on the male pereopod 7 merus and distinctly thinner medial lobe of the male pleopod 1 exopod.
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