Lucioblivio, 2007

Tomikawa, Ko, Kobayashi, Norio, Morino, Hiroshi & Mawatari, Shunsuke F., 2007, New gammaroid family, genera and species from subterranean waters of Japan, and their phylogenetic relationships (Crustacea: Amphipoda), Zoological Journal of the Linnean Society 149 (4), pp. 643-670 : 661-668

publication ID	https://doi.org/ 10.1111/j.1096-3642.2007.00277.x
DOI	https://doi.org/10.5281/zenodo.5597151
persistent identifier	https://treatment.plazi.org/id/D92D3636-4A23-FFF8-708F-FCC2FE0CD9F8
treatment provided by	Carolina
scientific name	Lucioblivio
status	sp. nov.

Treatment

LUCIOBLIVIO KOZAENSIS TOMIKAWA View in CoL SP. NOV.

Type material: Holotype: female, 6.3 mm (appendages on slides and carcass in ethanol), NSMT-Cr 16662, shallow riverbed of the Koza River (33°32′10″N, 135°47′47″E), Kozagawa Town GoogleMaps , Wakayama Prefecture, 11.iii.2004, collected by N. Matsumoto. Paratypes: two females, 4.2 mm (appendages on slide and carcass in ethanol), 3.4 mm (ethanol), NSMT-Cr 16663–16664, from 20 cm depth on the bank of the Seto River (34°52′50″N, 138°13′08″E), Terajima, Fujieda City GoogleMaps , Shizuoka Prefecture, 3.xi.2004, collected by T. Torii; two females, 6.5 mm (appendages on slides and carcass in ethanol), 4.9 mm (ethanol), NSMT-Cr 16665– 16666, shallow riverbed of the Kirime River (33°47′N, 135°14′E), Inami Town GoogleMaps , Wakayama Prefecture, February 2001, collected by K. Nishi.

Specimen for SEM observation: Female, 5.6 mm, data as for holotype.

Etymology: The species name is from the Latinized Japanese kozaensis (of Koza), referring to the type locality of the new species.

Description: Holotype, female, NSMT-Cr 16662. Head ( Fig. 13 View Figure 13 ): shorter than pereonites 1 and 2 combined; inferior antennal sinus shallow; eyes absent; rostrum short; lateral cephalic lobe weakly pointed. Antenna 1 ( Fig. 14A View Figure 14 ): length about 0.6 × body length; peduncular articles 1, 2 and 3 with length rations 1.0: 0.9: 0.3; posterior margin of article 1 with 3 robust setae, posterodistal part with single robust seta; articles 2–3 with lateral and medial setae; accessory flagellum 2- articulate ( Fig. 14B View Figure 14 ); primary flagellum 20-articulate, each article with 1 aesthetasc, calceoli lacking ( Fig. 14C View Figure 14 ). Antenna 2 ( Fig. 14D View Figure 14 ): about half the length of antenna 1; peduncular articles 4–5 with lateral and medial setae; length of article 4 1.3 × length of article 5; article 5 with 5 calceoli ( Fig. 14E View Figure 14 ); flagellum 11- articulate, articles with calceoli.

Pereonites 1–7 ( Fig. 13 View Figure 13 ): smooth, with fine setae. Pleonites 1–3 ( Fig. 15E–G View Figure 15 ): dorsal margin of each with 4 setae. Coxae: coxae 1–4 with marginal and facial setae; posterior margin of coxa 4 widely excavate ( Fig. 17C View Figure 17 ); anterior lobe of coxae 5–6 dominant ( Fig. 17E, F View Figure 17 ); coxa 7 shallow, 0.5 × as deep as wide ( Fig. 17H View Figure 17 ). Urosomites 1–3 ( Fig. 15H–J View Figure 15 ): dorsal margin with pair of robust setae.

Upper lip ( Fig. 14F View Figure 14 ): ventral margin truncate, lacking marginal setae. Lower lip ( Fig. 14G View Figure 14 ): outer lobes broad, shoulder acute, inner lobes fused, indistinct. Mandible ( Fig. 14H View Figure 14 ): left and right incisors 5- and 4-dentate, respectively ( Fig. 14I, K View Figure 14 ); left lacinia mobilis 4-dentate ( Fig. 14I View Figure 14 ), right lacinia finely dentate ( Fig. 14K View Figure 14 ); molar weak, not triturative, without seta; palp articles 1, 2 and 3 with length ratios 1.0: 2.5: 2.5; article 1 unarmed; article 2 with 12 marginal setae; article 3 with 2 A-setae, pair of B-setae, many D- setae, and Esetae, outer face without fine setae, apical margin with fine setae ( Fig. 14J View Figure 14 ). Maxilla 1 ( Fig. 14L View Figure 14 ): inner plate ovate, with 2 apical plumose setae; outer plate with seven robust serrate setae ( Fig. 14N View Figure 14 ); palp article 2 with 3 robust setae and 5 slender setae apically ( Fig. 14M View Figure 14 ). Maxilla 2 ( Fig. 14O View Figure 14 ): inner plate with 2 plumose facial setae in oblique row. Maxilliped ( Fig. 15A View Figure 15 ): inner plate short, reaching base of palp article 1, quadrate, apically with 1 robust seta and 2 weakly plumose setae ( Fig. 15B View Figure 15 ); outer plate narrowing distally, not reaching middle of palp article 2, with row of robust setae extending from apex along medial margin ( Fig. 15C View Figure 15 ); palp article 2 long, length 1.9 × length of article 1 and 1.8 × length of article 3; articles 2 and 3 medially setose, article 3 with apical lobe.

Gnathopods: dissimilar in size and form. Gnathopod 1 ( Fig. 16A View Figure 16 ): anterior and posterior margins of basis with long setae; ischium and merus short, ventral margin of merus setose; carpus short, length 0.3 × length of propodus, not lobate, with medial setae, ventral margin lined with setae; propodus stout, palm lined with small triangular protuberances, 16 robust setae, inner distal corner with 3 robust setae ( Fig. 16B View Figure 16 ); dactylus curved, posterior margin smooth ( Fig. 16B View Figure 16 ). Gnathopod 2 ( Fig. 16C View Figure 16 ): anterior and posterior margins of basis with long setae; carpus long, length 0.6 × length of propodus, with medial setae, not lobate, ventral margin lined with setae; propodus more slender than that of gnathopod 1, palm lined with small triangular protuberances, 12 robust setae, inner distal corner with 2 robust setae ( Fig. 16D View Figure 16 ); dactylus curved, posterior margin smooth ( Fig. 16D View Figure 16 ).

Pereopod 3 ( Fig. 17A View Figure 17 ): slender, anteroproximal and posterior margins of basis with long setae; ischium short, almost as long as width; length ratios of merus, carpus and propodus = 1.0: 1.0: 0.8, with short setae marginally; length of dactylus 0.4 × length of propodus, anteroproximal and posterior margin each with single seta ( Fig. 17B View Figure 17 ). Pereopod 4 ( Fig. 17C View Figure 17 ): like pereopod 3, except: length ratios of merus, carpus and propodus = 1.0: 1.1: 1.0; length of dactylus 0.3 × length of propodus ( Fig. 17D View Figure 17 ). Pereopod 5 ( Fig. 17E View Figure 17 ): anterior margin of basis with robust setae, posterior margin with fine setae, posteroventral lobe rounded; ischium short, about as long as wide; merus–dactylus missing. Pereopod 6 ( Fig. 17F View Figure 17 ): like pereopod 5, except: length of ischium 1.2 × its width; length ratios of merus, carpus and propodus = 1.0: 1.4: 1.4; dactylus slender, length 0.2 × length of propodus, with short seta anteriorly ( Fig. 17G View Figure 17 ). Pereopod 7 ( Fig. 17H View Figure 17 ): like pereopod 5, except: ischium short, length 0.9 × width; length ratios of merus, carpus and propodus = 1.0: 1.4: 1.4; dactylus stout, length 0.2 × length of propodus, with anterior seta ( Fig. 17I View Figure 17 ).

Brood plates: narrow, lacking brood setae, on pereopods 2–5. Pleopods ( Fig. 17J, M, N View Figure 17 ): peduncle and rami long; retinacula paired, without associate setae ( Fig. 17K View Figure 17 ); inner basal margin of inner ramus of pleopods 1–3 with 3, 2, and 2 bifid setae, respectively ( Fig. 17L View Figure 17 ); outer ramus 12-, inner ramus 9-articulate. Epimeral plates 1–3 ( Fig. 15K–M View Figure 15 ): not pointed posterodistally, lacking ventromarginal setae, posterior margins with 1, 1, and 3 setae, respectively.

Uropod 1 ( Fig. 15N View Figure 15 ): length of peduncle 1.2 × length of inner ramus, with robust setae on dorsolateral and dorsomedial margins, and with 4 basofacial robust setae; length of outer ramus 0.9 × length of inner ramus, outer and inner margins each with 2 robust setae; outer and inner margins of inner ramus with 2 and 4 robust setae, respectively. Uropod 2 ( Fig. 15O View Figure 15 ): length of peduncle 0.8 × length of inner ramus, with robust setae on dorsolateral and dorsomedial margins; length of outer ramus 0.6 × length of inner ramus, with 3 robust setae dorsally; outer and inner margins of inner ramus with 2 and 4 robust setae, respectively. Uropod 3 ( Fig. 15P–R View Figure 15 ): length of peduncle 0.4 × length of inner ramus, with single robust seta; outer ramus uniarticulate, outer margin with pair of robust setae and 2 clusters of robust setae, and single robust seta; inner margin with single simple seta, 2 robust setae, and 2 pairs of robust setae; inner ramus long, length 0.9 × length of outer ramus, outer margin with single simple seta and 3 robust setae. Telson ( Fig. 15S View Figure 15 ): length 1.6 × basal maximum width, dorsolateral margins with 2 robust setae and 2 fine setae, each lobe with robust seta apically; cleft 48%.

SEM observation: One female was observed via SEM. Calceolus ( Fig. 18A, B View Figure 18 ), stalk, and bulla well developed; concavity of proximal element shallow; distal element with ten well-defined transverse bands. Lacinia mobilis of right mandible not bifid ( Fig. 18C, D View Figure 18 ); molar weak, not tritulative ( Fig. 18C, E View Figure 18 ).

Remarks: This species occurs sympatrically with Eoniphargus kojimai at Seto River, Shizuoka Prefecture, and with Octopupilla felix at Koza River, Wakayama Prefecture.