Synurella aliciae Jażdżewski, Grabowski & Kupryjanowicz, 2014, sp. nov.
Creators: name: Jażdżewski, Krzysztof
name: Grabowski, Michał
name: Kupryjanowicz, Janusz
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda
Crangonyctidae
Synurella
Synurella aliciae

description: Synurella aliciae sp. nov.
Description. Head without visible rostrum, slightly longer than first pereon segment; shape of cephalic lobe difficult to define. No eyes visible. Antenna I long, nearly of the body length (Fig. 10 a). Number of articles in A I main flagellum around 20 (tips of flagella broken), accessory flagellum not visible due to some dust particles covering this part of A I. Antenna II length reaches half of A I. Flagellum of A II with less than 10 articles. Margins of pereonites and abdominal segments well seen only in dorsal parts. Margins devoid of armature; only 1 short setule set on dorsal surface of third abdominal tergite near hind margin (Fig. 11 b). Epimeral plates II and III, discernible only in specimen B, postero-ventrally acutely produced (Fig. 11 b). Urosome definitely unsegmented. Gnathopods in specimen A poorly visible—only anterior dorsal side of comparatively large propoduses could be observed. In the specimen B, only palmar margin of propodus and dactylus of gnathopod (I or II) visible (Fig. 12 a). Palmar margin delicately concave, armed with 2 rows of several short robust setae, whereas palmar antero-distal angle widely rounded and armed with 2 groups of rather long setae. Short palmar setae seem to be not bifid. Dactyl ventral margin set with 3 setae. Pereopods III and IV invisible (broken or hidden), pereopods V–VII of similar length, although P V seems to be a little shorter than the next appendages. Bases of these posterior pereopods of widely rounded oval shape; their hind margins delicately serrated (Fig. 11 b). In specimen A serrations of P V basis are set with short setules, whereas in specimen B serration only visible on hind margins of P VI and P VII basal articles. Merus, carpus and propodus of P V–VII of similar length. Distal parts of these articles armed with 2–4 robust setae of length equal or shorter than article width (Fig. 11 b). Single seta also on the anterior and/or posterior margins of these articles, more numerously on P V propodus in specimen A. The length of P V–VII dactyls equal to half of propodus length. Apical setae of propodus not longer than half of dactyl length. Peduncles of uropods I and II strong. Their margins set with row of robust setae (Fig. 12 c). Uropod rami poorly discernible in details but it seems that they are similar in length or somewhat shorter than peduncles. Only the armature of inner margin of U II endopodite in specimen B is better visible. This article apically armed with 3 robust setae and 1 such seta on its lateral margin. Uropod III not visible (possibly broken off) in both specimens. Telson visible in both specimens and turned upwards along urosome (Figs 11 b and 12c). In specimen A it was possible to observe ventral surface of telson (Fig. 12 d) deeply concave to more than half of its length and the tips of each lobe armed with 4 robust setae.
Etymology. This species is named in honour of Dr. Alicja Konopacka (Department of Invertebrate Zoology & Hydrobiology, University of Lodz, Poland), colleague and good friend of the first two authors, in recognition of long-lasting friendship and her contribution to the studies of Amphipoda over the years.
description: Published as part of Jażdżewski, Krzysztof, Grabowski, Michał & Kupryjanowicz, Janusz, 2014, Further records of Amphipoda from Baltic Eocene amber with first evidence of prae-copulatory behaviour in a fossil amphipod and remarks on the taxonomic position of Palaeogammarus Zaddach, 1864, pp. 401-417 in Zootaxa 3765 (5) on pages 410-411, DOI: 10.11646/zootaxa.3765.5.1, http://zenodo.org/record/225992