Revision of the genera Cyphonethes Verhoeff, 1926 and Titanethes Schioedte, 1849 (Isopoda: Oniscoidea: Trichoniscidae) with a description of a new genus and three new taxa Author Karaman, Ivo M. Author Horvatović, Mladen text Zootaxa 2018 2018-08-15 4459 2 261 284 journal article 29023 10.11646/zootaxa.4459.2.3 d1b4add2-e5bc-4d08-9502-274bab438721 1175-5326 1458574 49F5AF2B-E795-404B-A946-2C00DB6011B2 Cyphonethes tajanus n. sp. Figs 4–19 Material examined : HOLOTYPE : male 4.6 mm , Bosnia and Herzegovina , Zavidovići, Suha, Tajan planina Mt , jama Atom pit, 44° 17.923'N , 18° 12.688'E , 23.6.2011 , leg. A. Bajraktarević , ( ZZDBE-ISO1103 ) . PARATYPES : ibid., 23.6.2011 , A. Bajraktarević , 1♂ , 1♀ ; ibid., cave ZA-004, 11.4.2008 , leg. S. Polak , 1♂ , 4♀ ; ibid., cave ZA- 0 0 5, 11.4.2008 , leg. S. Polak , 4♀ ; ibid., cave ZA-014, 20.12.2008 , leg. A. Bajraktarević , 2♂ ; ibid., Ukrasna pećina cave, 22.11.2008 , leg. A. Bajraktarević , 1♂ ; ibid. 20.12.2008 , leg. A. Bajraktarević , 1♂ . Etymology . The species is named after the Tajan planina Mountain where the type locality is located. Diagnosis . Medium sized species (male up to 5.6 mm , female 5.7 mm long) without male tegumental glandpiliferous organ. Pereon tergites smooth with two transversal rows of big, prominent tubercles. Exopodite of pleopod 1 terminally truncated, with slightly concave terminal margine; medial margin of pleopod 2 exopodite almost straight. FIGURES 4–7. Cyphonethes tajanus n. sp. , male (4.5 mm). 4, body, lateral view. 5, body, frontal view. 6, cephalon and pereon tergites 1–3, lateral view. 7, cephalon, frontal view. FIGURES 8–13. Cyphonethes tajanus n. sp. , paratype female (4.8 mm). 8, antennula. 9, maxilliped. 10, maxilla 2, dorsal view. 11, maxilla 2, ventral view. 12, maxilla 1 endopodite. 13, maxilla 1 exopodite. Scale bar = 0.2 mm. Description . Cephalon ( Fig. 7 ) with three rows of small and low tubercles. Lateral lobes of quadrate form, as long as wide. Pereon tergites ( Figs 4–6 ) with two transversal rows of big, prominent tubercles. Pleon convex; pleonal segments 3–5 with slightly developed epimera. Pleotelson distal part triangular with truncated apex. Antennula ( Fig. 8 ) basal article as long as wide; second article longer than wide; distal article 1.5 times longer than wide, bearing 8 aesthetascs. Antenna ( Fig. 14 ) article 3 is twice as long as broad; article 4 is 3 times longer than broad, articles 4 and 5 as long as flagellum. Right mandible with two penicils; pars incisiva with three teeth; lacinia mobilis inverted cone shaped, finely thorny appicaly; pars molaris oval. Left mandible with three penicils; pars incisiva lateralis with four teeth; pars incisiva medialis massive, with three teeth; pars molaris ovoid. Maxilla 1 exopodite ( Fig. 13 ) with 4 strong outer teeth, 3 elongated thin medial teeth, 4 shorter inner tooth and 2 elongated pectinate setae distally. Endopodite ( Fig. 12 ) with 3 short penicils, proximal one slightly elongated. Maxilla 2 ( Figs 10–11 ) inner lobe shorter than outer one; inner lobe with 3 rod-like setae on its tip and row of very tiny elongated setae on outer margin; outer lobe on ventral surface with row of rod-like setae subterminally; on dorsal side row of such setae on inner margine; on base of that row one short and stout plumose seta; dorsal side of the tip of outer lobe with brush-like surface of dense, flattened setae. FIGURES 14–16. Cyphonethes tajanus n. sp. , holotype male (4.6 mm). 14, antenna. 15, pereopod 1. 16, pereopod 7. Scale bar = 0.5 mm. Maxilliped ( Fig. 9 ) basipodite latero-distal part with sharply tapered tip, outer margin with rows of elongated tiny setae; palp on medial edge with pronounced lobe with setae; outer edge with low protrusions, each with simple setae; endite apex terminally with large penicil, strong spine on medial edge, strong and very short spine on the outer edge. Pereopods elongated, with elongated fused dactylus and unguis; fused dactylus and unguis almost half the length of propodus. Pereopod 1 ( Fig. 15 ) ischium, merus and carpus of same length, propodus shorter than carpus. Pereopod 7 ( Fig. 16 ) propodus and carpus of same length; merus with slightly concave sternal margin. Genital papilla ( Fig. 17 ) cylindrical, slightly tapering toward dorsally directed tip. Pleopod 1 ( Fig. 18 ) endopodite biarticulated, basal article shorter than terminal one; terminal article proximally of blade shape. Exopodite triangular, terminally with concave margin. Pleopod 2 ( Fig. 19 ) endopodite biarticulated; distal article simple, rod like; basal article as long as exopodite. Exopodite in form of rounded rectangle. Uropod endopodite slightly shorter than exopodite, somewhat proximally inserted. Remarks . This species is closely related to C. biseriatus , from which it is clearly distinguished by the tergal sculpture and the shape of exopodites of pleopods 1 and 2. Tergal sculpture (tubercles) are remarkably prominent in comparison with the same in C. biseriatus . C. tajanus n. sp. is larger than C. biseriatus . This species is known so far only from caves of a small isolated karst area—Tajan Nature Park, south of the town of Zavidovići in central Bosnia ( Fig. 3 ).