Graeconiscus gevi, Garcia 1 & Miralles-Núñez 2 & Pérez-Fernández 3, 2020
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publication ID |
https://dx.doi.org/10.3897/subtbiol.36.58272 |
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publication LSID |
lsid:zoobank.org:pub:15F31D1A-00BC-4373-8A7F-2151F1AA4974 |
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persistent identifier |
https://treatment.plazi.org/id/60367B28-51C4-4B61-98D3-00CD706DB836 |
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taxon LSID |
lsid:zoobank.org:act:60367B28-51C4-4B61-98D3-00CD706DB836 |
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treatment provided by |
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scientific name |
Graeconiscus gevi |
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sp. nov. |
Graeconiscus gevi sp. nov. Figs 2 View Figure 2 , 3 View Figure 3 , 4 View Figure 4
Graeconiscus thermophilus . - Taiti and Rossano 2015: 2073, figs 3-5.
Etymology.
Derived from G.E.V., the acronym in Spanish of the Villacarrillo Speleological Group, for its great contribution to the knowledge of the subterranean biodiversity of the Andalusian region.
Examined material.
Holotype. Spain • 1 male; Málaga, Antequera, Cueva del Yeso III; ETRS89 UTM 30S 345702 4094826, 441 m a.s.l.; 27 Apr. 2008; Toni Pérez-Fernández leg.; MNCN 20.04/12093. Paratypes. Spain • 3 males, same data as holotype; MNCN 20.04/12094, MNCN 20.04/12095, MNCN 20.04/12096. 4 females, same data as holotype; MNCN 20.04/12097, MNCN 20.04/12098, MNCN 20.04/12099, MNCN 20.04/12100. 1 male, 3 females, same data as holotype; CLLG 153. 1 male, 2 females, same locality as holotype, 26 Sep. 2009; Toni Pérez-Fernández leg.; CLLG 185. 1 male, 3 females, same locality as holotype; 28 Sep. 2008; Toni Pérez-Fernández leg.; CLLG 183. 1 male, 2 females, same locality as holotype; 29 Mar. 2008, Toni Pérez-Fernández leg.; CLLG 144.
Non type material.
Spain • 7 damaged specimens; same locality as holotype; 24 Oct 2009; Toni Pérez-Fernández leg.; MBCN 23370.
Comparison material.
Graeconiscus thermophilus . Cyprus • 5 males, 3 females; Loutra Afroditis; 4 Feb. 2020; Spyros Sfenthourakis leg.; CLLG 582.
Diagnosis.
A blind and unpigmented species of Graeconiscus . Head with central anterior tubercle bilobed; posterior row of tubercles with the central ones almost fused. Pereon-tergites 1-6 with four individualized rounded, swollen, tubercles (2+2) not reaching the pereonites hind margin. Seventh pereonite with two large paramedian rounded, swollen, tubercles not reaching the hind margin. Pleonite 3 with a single, large and swollen, transversal tubercle.
Description.
Maximum size observed: 3.2 mm (female), 3 mm (male). Body unpigmented. Eyes absent. Contour regularly ovoid, without interruption between pereon and pleon (Figs 2A View Figure 2 , 4A-D View Figure 4 ). Pereon tergites very convex, with epimera expanded towards outside. Pleon epimera directed backwards. Cephalon (Fig. 4B View Figure 4 ) with triangular frontal lobe, apically rounded, and almost quadrangular lateral lobes with rounded anterior margin; head with 1 large central bilobed tubercle and 2 accessories; maxillipedal segment with 4 tubercles, central ones almost fused. Pereon-tergites with 4 rounded tubercles (2+2), slightly longer than wide in tergites 1-4, larger and swollen in 5-6, without exceeding its hind margin; pereonite 7 with 2 large paramedian rounded tubercles and small rugosities in its anterolateral part. Pleonite 3 with single, large and rounded, transverse tubercle, wider than long (Fig. 4C, D View Figure 4 ). Telson basally trapezoidal, with straight hind margin. Uropods: exopod longer than endopod. First antenna (Fig. 2C View Figure 2 ) tri-segmented; last antennular article longest, with 3 aesthetascs. Second antenna (Fig. 2B View Figure 2 ): flagellum with 3 poorly distinct articles; basal article with 2 thin aesthetascs; second article with 3-4, thicker. Mandibles with strong molar teeth. Right mandible (Fig. 2G View Figure 2 ) with 1 free penicil near the lacinia mobilis; left mandible (Fig. 2H View Figure 2 ) with 2 free penicils. Maxillule (Figure 2E View Figure 2 ): external branch with 5+4 undivided teeth; internal branch with 3 penicils, external penicil twice larger than internal ones. Maxilla (Fig. 2F View Figure 2 ) with bilobed distal part; internal lobe with 14-15 sensillae; external lobe with 3-4 sensilla and fine and long hairs; internal lobe approximately twice as wide as external one. Maxilliped (Fig. 2D View Figure 2 ): endite with subconical distal penicillium provided with fine hairs and subapical seta; palp with 2 setae in their basal article; distal part triangular with numerous sensillae. Pereopods (see male sexual characteristics). Uropods: sympodite reaching posterior edge of pleotelson.
Male: Pereopod 1 (Fig. 3A, B View Figure 3 ) not modified. Pereopod 7 (Fig. 3C View Figure 3 ) without modifications. Pleopod 1 (Fig. 3D View Figure 3 ) exopod subtriangular with concave external margin from their apical third; endopod with thick distal part, conical, striated, with fine setae in the middle part. Pleopod 2 (Fig. 3E View Figure 3 ): exopod with basal part rectangular, posterior lobe narrow with rounded apex; endopod sharply narrowed from middle and very small apical seta.
Remarks.
This new species is included in the genus Graeconiscus Strouhal, 1940 due to its tergal ornamentation, which is characterized by two transversal rows of tubercles on the cephalon, 2+2 tubercles on the pereon-tergites 1-6, two paramedian tubercles on the seventh pereonite and a single central tubercle on the third pleonite ( Schmalfuss et al. 2004). Currently, a total of 12 species are included in this genus, most of them initially assigned to other genera (see Schmalfuss et al. 2004; Alexiou and Sfenthourakis 2013). Almost all of them were originally described from islands, or continental sites, in Greece. G. caecus (Vandel, 1958), G. guanophilus Schmalfuss, Paragamian & Sfenthourakis, 2004, G. kournasenseis Schmalfuss, Paragamian & Sfenthourakis, 2004 and G. strouhali (Vandel, 1958) were found on the island of Crete (Aegean Sea). G. dryoperorum (Vandel, 1964) was initially described from the island of Evia, in the Aegean; G. liebegotti Schmalfuss, 1981, from the island of Gioura, in the northern Sporades; G. multicostatus (Karaman, 1961), from the Titov Veles region, in North Macedonia; G. paxi Strouhal, 1961 and G. tricornis (Strouhal, 1936), from the island of Corfu; G. strinatii (Vandel, 1955) from the outskirts of Athens; G. xerovunensis (Strouhal, 1954) from NW Greece and, finally, G. thermophilus ( Çaglar, 1948) was originally described from western Turkey and has been recorded in the southern Aegean islands, including Crete ( Schmalfuss 2003; Alexiou and Sfenthourakis 2013).
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