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Protistology New Testate Amoebae (Protozoa, Testacea) from The Protistology 6 (2), 111–125 (2009) Protistology New testate amoebae (Protozoa, Testacea) from the Northern-East Azerbaijan inland water bodies Nataly Snegovaya and Ilham Alekperov Laboratory of Protistology, Institute of Zoology, Azerbaijan National Academy of Sciences, Baku, Azerbaijan Summary Testate amoebae of the Northern-East Azerbaijan several small inland water bodies have been investigated. In the present paper descriptions of the new genus and 12 new species (Centropyxis pileformis sp. n., C. trigonostoma sp. n., C. pectinata sp. n., Difflugia crucistoma sp. n., D. immemorata sp. n., D. khachmazica sp. n., Lesquereusia nabranica sp. n., L. contorta sp. n., L. azerbaijanica sp. n., L. macrolabiata sp. n., Shamkiriella turanica sp. n., Nabranella brevis gen.et sp. n.) have been given. Key words: testate amoebae, freshwater, fauna of Azerbaijan Introduction lection of the Protistology laboratory in the Institute of Zoology NAS of Azerbaijan, Baku city. Statistics were performed using the program The aquatic testate amoebae of the Northern- − East Azerbaijan inland water bodies were not SigmaStat 2.0 ( X – arithmetic mean, M – median, investigated. This region not far from state border SD – standard deviation, SE – standard error, CV – with Russia has numerous shallow small rivers and coefficient of variance (%), Max – maximum, Min spring waters mainly with clean fresh water. In the – minimum, n – number of specimens). present paper we have shown the results of our two years investigations the fauna of testate amoebae of Results freshwater plankton, periphyton and sediments this region rivers and spring waters. CEN T ROPYXIS PILEFORMIS S P . N. (FI G . 1, A-C; PLATE 1, A-C) Material and methods Diagnosis. Shell 165-180 µm × 140-150 µm. Shell We have studied the fauna of testate amoebae hat-like shape laterally with three different size oval in the several small rivers and spring waters of cavity along shell ½ size perimeter. Usually 2-3 lobose Northern-East Azerbaijan near Russian borders. pseudopodia. Freshwater. In 2004-2007 more than 60 samples of freshwater Type specimens. One holotype as a slide N-E-4 plankton, periphyton and benthos were collected has been deposited. and processed. Testate amoebae were caught by Type location. Sediments in the spring water near microcapillars and studied basically in vivo. The type Nabran village. material all new taxa has been deposites in the col- Description. The shell is oval in ventral view and © 2009 by Russia, Protistology 112 · Nataly Snegovaya and Ilham Alekperov Table 1. Biometric characteristic of Centropyxis pileformis sp. n. − Character X M SD SE CV Min Max n Length of shell 173.0 173.0 4.922 1.556 0.028 165.0 180.0 10 Breadth of shell 144.90 145.0 4.254 1.345 0.029 140.0 150.0 10 Height of shell 86.0 86.0 4.055 1.282 0.047 80.0 90.0 10 Length of aperture 76.6 73.0 2.366 0.748 0.031 70.0 75.0 10 Breadth of aperture 65.4 65.0 1.578 0.499 0.024 63.0 67.0 10 Length of spines 22.4 23.0 2.221 0.702 0.099 20.0 25.0 10 hat-like flattened laterally. Length of shell 165-180 Type specimens. One holotype as a slide N-E 1 µm, breadth 140-150 µm, height 80-90 µm. In the has been deposited. middle of the ventral side there is a large trapezoidal Type location. Sediments and surface aquatic aperture (70-75 × 63-67 µm). The shell usually has plants in the spring water near Nabran village. 2 lateral spines (20-25 µm long). There are 3 lateral Description. Length of shell 70-80 µm, breadth cavities. All shell surface covered with inorganic 80-90 µm. Shell shape with well developed triangular particles of different shape and size. Endoplasm torsion below aperture and rounded anterior top. colorless. Pseudopodia are lobose, usually 2-3. There The aperture bordered by a thin lip well visible are 1-3 contractile vacuoles. from ventral side. There are two spherical anterior Comparision with related species. There are only cavities on left and right side from aperture. The shell two Centropyxis species more or less morphologically surface revetment with sand grains of different shape. similar to C. pileformis sp. n.. First of them C. Endoplasm grey. Pseudopodia are lobose, usually recurvata Vucetich, 1976, which has similar body 1-2. There are 3-6 contractile vacuoles. shape from lateral view, but clearly differs from C. Comparison with related species. Considering pileformis by bigger shell size (165-180 µm versus its overall appearance, C. trigonostoma sp. n. should 200-230 µm), twice more aperture size (70-75 µm be compare with closely related by shell shape and versus 135-150), its shape and location (C. pileformis sizes C. hirsuta Deflandre, 1929, C. cassis spinifera has aperture in the middle of the ventral side). From (Playfair, 1918) Deflandre, 1929, C. aculeata C. cordobensis Vucetich, 1976 our C. pileformis sp. minima Van Oye, 1958, C. decloitrella Laminger, n. clearly differs by smaller shell size (165-180 µm 1973 (Table 4). C. trigonostoma sp. n. is easily versus 260-285 µm), height of shell (80-90 µm versus distinguished from the remaining known species 200-210 µm) and breadth of shell (140-150 µm versus of the genus Centropyxis by its uncommon shell 190-210 µm). C. pileformis has two lateral spines and shape, arrangement aperture and its biometric lateral cavities which absence in C. cordobensis. characteristics (Table 2). Etymology. The species name refers to hat-like Etymology. The species name refers to its aperture shell morphology. shape. CEN T ROPYXIS T RIGONOS T OMA S P . N. (FI G . 1, D-E; PLATE CEN T ROPYXIS PE ct INA T A S P . N. (FI G . 2, A-B; PLATE 1, 1, D-F) G, 2, A) Diagnosis. Uncommon shell shape with well Diagnosis. Shell with characteristic anterior top developed ventral torsion below aperture and two spine and cone-like shape from apertural view. spherical anterior cavities on left and right sides Type specimens. One holotype as a slide N-E 2 from aperture. has been deposited. Table 2. Biometric characteristic of Centropyxis trigonostoma sp. n. − Character X M SD SE CV Min Max n Length of shell 75.8 75.0 4.050 1.281 0.053 70.0 80.0 10 Breadth of shell 85.7 86.0 3.831 1.212 0.045 80.0 90.0 10 Length of spines 17.7 18.0 2.263 0.716 0.128 15.0 20.0 10 Protistology · 113 Fig. 1. A-C – Centropyxis pileformis sp. n.: A – ventral, B – aboral, C – lateral side; D-E – C. trigonostoma sp. n.: D – ventral, E – apical side. Scale bars: A-C – 50 µm; D-E – 20 µm. Type location. Sediments in the spring water near outline is ovoid with characteristic apical top spine. Nabran village. Oval aperture sizes 30-40 × 45-50 µm. Shell has 6-7 Description. Shell triangular anteriorly with lateral spines. Its length – 25-30 µm. Endoplasm rounded aboral part. Shell length is 100-120 µm, grey, long blade-shape 1-2 pseudopodia are rarely breadth – 50-60 µm. From ventral side the shell observed. Table 3. Biometric characteristic of Centropyxis pectinata sp. n. − Character X M SD SE CV Min Max n Length of shell 109.0 107.5 8.433 2.667 0.077 100.0 120.0 10 Breadth of shell 56.0 57.5 4.595 1.453 0.082 50.0 60.0 10 Length of aperture 35.5 35.0 4.378 1.384 0.123 30.0 40.0 10 Breadth of aperture 49.9 50.0 3.985 1.260 0.08 45.0 50.0 10 Depth of aperture 18.8 20.0 3.011 0.952 0.160 15.0 22.0 10 Length of spine 28.2 30.0 2.394 0.757 0.085 25.0 30.0 10 114 · Nataly Snegovaya and Ilham Alekperov Plate 1. A-C – Centropyxis pileformis sp. n., A – ventral, B – aboral, C – lateral side; D-F – C. trigonostoma sp. n., D – ventral, E – apical, F – aboral side; D – C. pectinata sp. n., ventral side. Scale bars: A-C – 50 µm; D-G – 20 µm. Comparison with related species. C. pectinata Type specimens. One holotype as a slide N-E 7 sp. n. distinctly differs from the other species of the has been deposited. Centropyxis genus by its shell shape, arrangement of Type location. Sediments in the spring water near a characteristic anterior top spine, presence of dorsal Khudat city. ones and by its biometric characterization (Table 3). Description. The shell elongate, flattened Comparison C. pectinata sp. n. with related species laterally (85-95 × 65-75 µm). Apical aperture without are given in the Table 5. collar and has constant four blades shape. Aperture Etymology. The species named refers Lat. size – 15-20 µm. The shell surface covered with “pectinatus” – pectinate. a small siliceous particles. The endoplasm bright brown. There are 3-5 short lobopodia. DIFFLUGIA C RU C IS T OMA S P . N. (FI G . 2, C-D; PLATE 2, Comparison with related species. According to B-C) the sub-division of Gauthier-Liévre and Thomas (1958), D. crucistoma sp. n. belongs to the loboses Diagnosis. Shell elongate, flattened laterally. group of the Difflugia genus. D. crucistoma should be Apical aperture has invariable four blades without compared with closely related species of this group collar. Freshwater. – D. gramen Penard, 1902, D. lismorensis Playfair, Protistology · 115 Table 4. Comparison Centropyxis trigonostoma sp. n. with related species.
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