Atractides marsus, Pešić, Vladimir, Smit, Harry & Gerecke, Reinhard, 2012
publication ID |
https://doi.org/ 10.5281/zenodo.211101 |
DOI |
https://doi.org/10.5281/zenodo.6178210 |
persistent identifier |
https://treatment.plazi.org/id/824187FC-EE29-9866-318A-FA3DFCBEFB81 |
treatment provided by |
Plazi |
scientific name |
Atractides marsus |
status |
sp. nov. |
Atractides marsus sp. nov.
( Fig. 1 View FIGURE 1 A – E )
Type material. Holotype Ƥ, dissected and slide-mounted, France F135, dept. Cantal, Auvergne, River Le Mars at crossing with D12 upstream of Le Falgoux 1115 m a.s.l., 45° 07'616" N, 2° 38'623" E, 18.v.2005 Smit.
Diagnosis. (Only female known). Dorsal and ventrocaudal muscle attachments and excretory pore sclerotized; Vgl-1 fused to Vgl-2; I-L-5 and –6 little modified, S-1 and -2 short, homoiomorphic, inserting at the same level, apically knob-shaped; P-2 with a pointed distoventral projection; both ventral setae and sword seta of P- 4 in proximal segment half.
Description
Female. Dorsal integument striated; muscle attachments plates sclerotized: postoc, D-1 and Dgl-3 on an Lshaped platelet, D-2 separate, D-3 fused with Dgl-4; D-4 separate. Coxal field: L 231; Cx-III W 272; Cx-I+II mL 91, lL 188; mediocaudal margin of Cx-1+2 tongue-shaped, apodemes Cx-2 directed laterally; Genital field ( Fig. 1A View FIGURE 1 A – E ): L/W 144/134, pregen large and slender, gonopore very long, genital plate L 76, flanking the postgenital sclerite, L Ac 1-3: 28, 27, 21.
Palp ( Figs. 1C–D View FIGURE 1 A – E ): total L 296, dL: P-1, 25; P-2, 67-69; P-3, 67-69; P-4, 103; P-5, 32; L ratio P-2/P-4, 1.0; P-2 ventral margin straight, ending in a pointed ventrodistal protrusion, ventral margin of P-3 straight, ending in a pointed ventrodistal edge, P-4 ventral setae both in proximal part od segment (ventral margin divided by setae insertions into three concave sectors, ratio 1:1:3), both ventral seta insertions flanked by tubercular protrusions, sword seta on the level of distoventral seta.
I–L ( Fig. 1E View FIGURE 1 A – E ): I-L-5/–6 little modified, I-L-5 with subparallel dorsal and ventral margins, S-1 and -2 short, homoiomorphic, with knob-shaped tip, inserted side by side (no interspace visible in lateral view); I-L-6 nearly straight, with dorsal and ventral margins equally diverging distally; I-L-5 dL 106, vL 83, dL/vL ratio 1.28, HB 27, dL/HB 3.9, S-1 L 35, L/ W 9.2, S-2 L 35, L/ W 9.2, distance S-1-2 0, L ratio S-1/2 1.0; I-L-6 L 101, HB 23, L/HB ratio 4.4; L ratio I-L-5/6 1.05.
Discussion. The female from Le Mars River agrees with Atractides pumilus (Szalay, 1946) , and A. ubinicus Tuzovskij, 1980 from many points of view: sclerotization of muscle attachments plates and excretory pore, fusion of Vgl-1+2, genital plates triangular in shape and located near posterior end of gonopore, I-L-5/6 little modified, S- 1 and S-2 short and stout, without interspace, ventral setae on P-4 flanked by distinct, apically truncated tubercles. Both species differ from A. marsus in shape of P-2 (ventrodistal protrusion not developed or little projecting) and P-4 (distoventral seta and sword seta located in distal part of the segment). Atractides pumilus differs furthermore in a stouter I-L-6 (L/HB ratio 4.1). These clearcut differences, together with the fact that in pumilus -like species no particular sexual dimorphism is to be expected, allows to introduce a new species based on this single female specimen.
A further female with similar morphology of I-L-6 (L/HB 4.3) and P-4 (both setal tubercles in proximal half) is found in coll. Angelier („ Megapus primitivus ƤTech, Arles s/Tech [Pyr.-or.], 11.VIII.1948, phreaticole“). It differs, however, from the species discussed here, in having Vgl-1/2 separated and excretory pore unsclerotized, and from the type of A. marsus also in the absence of a ventrodistal projection on P-2. This specimen belongs surely not to A. pumilus (syn. A. primitivus , see Gerecke 2003), but represents probably a further undescribed species. In view of the bad conservation (idiosoma squeezed, one palp broken), a description of this taxon is impossible before more material becomes available.
Etymology. Named after its occurrence in Le Mars River.
Distribution. France, known only from the type locality.
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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