Trans. Proc. Palaeont. Soc. Japan, N. S., No. 115, pp. 135-142, pis. 19, 20, Sept. 30, 1979

706. SOME INTERESTING FROM THE UPPER PALEOZOIC IN CHAPARRA AREA, SOUTHWEST PERU*

NOBUO Y AMAGIW A

Department of Earth Science, Osaka Kyoiku University, Osaka 543

and

CESAR RANGEL Z.

Instituto de Geologia y Mineria, Jesus Maria, Lima, Peru

Abstract. Four fusulinid species and one new coral species described in this article were found from the Upper Paleozoic at the south of Pampa Lobos, Chaparra area, Southwest Peru. Judging from the paleontological data, the present assemblage indicates an early Wolfcampian age.

Introduction SON, 1954); it is associated with Schuber­ tella kingi, Pseudofusulinella utahensis, Some fusulinid and coral specimens Dunbarinella hughsensis and Schwagerina were found in a rock fragment collected ? sp. Some specimens referred to it with by Eng. 0RCHAUSKifrom the Upper Paleo­ a query were found in the Lower Wolf­ zoic exposed at the south of campian of Hueco Pampa Lobos, Chaparra area, Southwest mountains, Texas (THOMPSON and Bis­ Peru (15°58' S. Lat., 73°50' W. Long.). SELL in THOMPSON, 1954); they are as­ In this article, the following four fusu­ sociated with Schwagerina sp. Later linids and one new coral are described, Triticites cellamagnus was found from and their age is discussed. the Lower Wolfcampian part of the Earp Formation in Southeast Arizona Fusulinids : Triticites cellamagnus THOMPSON (SABINS and Ross, 1963) together with T. & BISSELL meeki and Schwagerina compacta. THOMP­ T. meeki (MoLLER) T. sp. A SON, DODGE and YOUNGQUIST (1958) and T. sp. B SLADE (1961) also reported it from the· Coral: Durhamina? andensis n. sp. Lower Wolfcampian of Idaho and Nevada. According to THOMPSON (1954) and Triticites cellamagnus was originally SLADE (1961), Triticites meeki occurs in described from the Lower Wolfcampian the Lower Wolfcampian of Kansas, Ne­ part of the Oquirrh Formation, Central braska, Oklahoma, Texas, Arizona, Nevada Utah (THOMPSON and BISSELL in THOMP- and Wyoming. It was also found from * Received Dec. 12, 1978; read June 3, 1978 the Lower Wolfcampian part of the Earp at Tsukuba University. Formation, Southeast Arizona (SABINS 135

NII-Electronic Library Service 136 Nobuo YAMAGIWA and Cesar RANGEL Z. and Ross, 1963) together with Schubertella and KATO, 1965) from the Upper Wolf­ kingi, Triticites creekensis, T. cellamagnus campian Lenox Hills Formation, Texas. and Schwagerina grandensis. It closely Judging from these fossils the present resembles Triticites pajerensis and T. cf. assemblage shows an affinity with those victoriensis described by ROBERTS in from the Lower Wolfcampian in North NEWELL, CHRONIC and ROBERTS (1953) America and Peru. The writers consider from the Silvaseptopora zone of the Lower that the present fossils also indicate an Wolfcampian part of the Copacabana early Wolfcampian age. Group in Peru. Triticites sp. A, T. sp. B and T. sp. C Triticites sp. A resembles T. californicus were formerly discovered and illustrated and T. pinguis. Triticites californicus has by BELLIDO and NARY AEZ (1960) from been found from the Wolfcampian part the Upper Paleozoic in Atico area, South­ of the Bird Spring Formation, California west Peru. According to them, the (THOMPSON and' HAZZARD in THOMPSON, fusulinids indicate a age. WHEELER and HAZZARD, 1946), where it However, the writers consider that the occurs in association with Schwagerina fusulinids may be related to the present proutdens, Dunbarinella concisa, Pseudo­ fauna in specific assemblage and may schwagerina voeseleri, Schubertella ki11gi indicate an early Wolfcampian age. and S. masoni. It also occurs in the Lower Wolfcampian of the Great Basin Acknowledgements region, North America, according to BRILL (1963). Triticites pinguis was originally The writers wish to express their described from the Lower Wolfcampian hearty thanks to Eng. E. 0RCHAUSI (In­ in Texas (DUNBAR and SKINNER, 1937). stituto de Geologia y Mineria, Lima) who Later it was discovered from the Lower perimitted them to study the present in­ Wolfcampian Neal Ranch Formation, teresting materials, to Prof. Emeritus H. Texas (Ross, 1963) and from the Lower FUJIMOTO (Tokyo University of Educa­ Wolfcampian part of the Earp Formation, tion), Prof. S. MAEDA (Chiba University) Southeast· Arizona (SABINS and Ross, and ex-director E. BELLIDO (Instituto de 1963). Geologia y Mineria, Lima) for their kind Triticites sp. B somewhat resembles suggestions and to Dr. Y. TAKEI (Geo­ such specimens as T. titicacaensis and T. logical Survey of Japan) for his assistance aff. titicacaensis described from the Wolf­ in consulting many needful references. campian part of the Copacabana Group Photographic work was done by Mr. K. in Peru (ROBERTS in NEWELL, CHRONIC NARUHASHI (Osaka Kyoiku University) to and ROBERTs·; 1953; MAEDA, Y AMAGIW A, whom the writers extend their thanks. BELLIDO and RANGEL, 1974). However, the former is distinct from the latter Description of Species two in some important characters ·(see description). Superfamily Fusulinacea On the other hand, one new coral von MoLLER, 1878 species, Durhamina? andensis n. sp. re­ Family Fusulinidae .von MoLLER, 1878 sembles D.? uddeni (Ross and Ross, 1963; MINATO .and KATO, 1965) from the Vir­ Subfamily Schwagerininae DUNBAR gilian Gaptunk Formation of Texas and and HENBEST, 1930 D. hessensis (Ross and Ross, 1962; MINATO Genus Triticites GIRTY, 1904

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Triticites cellamagnus THOMPSON Remarks: The distinct characters of and BISSELL the present form are its large proloculus, fusiform shell of medium size, thick Plate 19, fig. 1 spirotheca and loosely coiled shell. The features mentioned above practically 1954. Triticites cellamagnus THOMPSON and agree with those of the original speci­ BissELL in THOMPSON, p. 43, pl. 11, mens of Triticites cellamagnus and T. figs. 1-12. 1954. Triticites cellamagnus (?), THOMPSON cellamagnus (?) described by THOMPSON and BISSELL in THOMPSON, p. 43, pl. 10, and BISSELL in .THOMPSON (1954). The figs. 14-17. present form resembles Triticites sp. A 1958. Triticites cellamagnus: THOMPSON, in this article in many respects, but the DoDGE and YouNGQUIST, p. 121, pl. 19, former differs from the latter in having figs. 13-15. larger proloculus. It is also similar to 1961. Triticites cellamagnus: SLADE, p. 72, Triticites meeki (MOLLER). However, the pl. 10, fig. 2. former has larger proloculus and shorter 1963. Triticites cellamagnus: SABINS and shell. It is distinguishable from Triticites Ross, p. 345, pl. 36, figs. 13-15. creekensis THOMPSON (1954, p. 42, pl. 9, Shell is medium in size, fusiform, with figs. 21-26, pl. 10, figs. 1-13 ; SLADE, straight axis of coiling and bluntly 1961, p. 73, pl. 10, fig. 4; CASSITY and pointed poles. Lateral slopes of mature LANGENHEIM, 1966, p. 951, pl. 113, figs. shell are slightly convex and nearly 19-22; STEINER and WILLIAMS, 1968, p. straight. The first volution is subspherical 56, pl. 11, figs. 1-5) in having larger in shape; beyond the first volution, the proloculus and convex or straight lateral . shapes gradually become elongate. A slopes. specimen having five volutions (pl. 19, Occurrence: Limestone at the south of fig. 1) is 6.0 mm in length and 2.8 mm in Pampa Lobos, Chaparra area, Southwest width, giving a form ratio of about 2.1. Peru. The present form is associated Proloculus is large in size, spherical in with Triticites meeki, T. sp. A, T. sp. B shape. Its outside diameter is 0.42 mm. and Durhamina? andensis n. sp. Height of chambers in the first to the Repository: Reg. no. NSM-MPC 1844 fifth volution of the above mentioned (National Science Museum). specimen is 0.09, 0.14, 0.16, 0.22 and 0.25 mm, respectively. Spirotheca is thick, Triticites meeki (MoLLER) composed of a tectum and coarse alveolar

keriotheca. Its thickness in the first to Plate 19, figs. 5-7 the fifth volution of the above mentioned one is 0.04, 0.06, 0.07, 0.10 and 0.11 mm, 1858. Fusulina cylindrica var. ventricosa: respectively. Septa are strongly fluted MEEK and HAYDEN (part), p. 261. in extreme polar regions, but gradually 1865. Fusulina cylindrica: MEEK and HAYDEN (part), p. 14, pl. 1, fig. 6a. decreasing in fluting towards the center 1879. Fusulina ventricosa var. meeki: MoLLER of shell, and almost unfluted above tunnel. (part), p. 4. Chomata are distinct and massive throu­ 1928. Triticites ventricosus: DuNBAR and ghout the shell except the last volution. CoNDRA (part), p. 84, pl. 1, fig. 2, pl. 3, Tunnel angles in the first to the fourth fig. 1, pl. 4, fig. 4. volution of the above mentioned one are 1954. Triticites meeki ·. THOMPSON (part), p. 25, 28, 30 and 35 degrees, respectively. 39, pl. 12, figs. 1-11, pl. 13, figs. 1-12.

NII-Electronic Library Service 138 Nobuo YAMAGIWA and Cesar RANGEL Z.

1961. Triticites meeki: SLADE, p. 72, pl. ] 0, Occurrence: Limestone at the south of fig. 3. Pampa Lobos, Chaparra area, Southwest 1963. Triticites meeki: SABINS and Ross, p. Peru. The associated fossils are Triticites 339, pl. 36, figs. 4-5. cellwnagnus, T. sp. A, T. sp. B and Shell is elongate fusiform in shape, Durhamina? andensis n. sp. with bluntly pointed poles. Axis of coil­ Repository: Reg. nos. NSM-MPC 1848- ing is almost straight. Lateral slopes 1850 (National Science Museum). are convex to slightly concave. A mature specimen having seven volutions (pl. 19, Triticites sp. A fig. 6) is 4.3 mm in half length and 1.4 mm Plate 19, figs. 2-4 in half width, giving a form ratio of about 3.1. Proloculus is medium in size, Shell is medium in size, inflated fusiform spherical in shape, having outside dia­ in shape, with bluntly pointed poles, meter of 0.22 to 0.24 mm. Average height straight axis of coiling and convex lateral of chambers in the third to the seventh slopes. A specimen illustrated as fig. 2 volution is 0.10, 0.14, 0.19, 0.24 and 0.27 on plate 19 having five and a half volu­ mm, respectively. Spirotheca is relatively tions is 5.7 mm in length and 3.3 mm in thick, composed of a tectum and coarse width, with a form ratio of about 1.7. alveolar keriotheca. Its average thickness Proloculus is medium in size, subspherical is 0.02, 0.04, 0.05, 0.06, 0.08, 0.11 and 0.09 in shape, with outside diameter of 0.24 mm in the first to the seventh volution, to 0.26 mm. Average height of chambers respectively. Septa are strongly fluted in the first to the seventh volution is in polar regions and weakly fluted in 0.07, 0.09, 0.13, 0.18, 0.26, 0.28 and 0.29 mm. central part. Chomata are distinct and respectively. Spirotheca consists of a asymmetrical in shape. Average tunnel tectum and keriotheca with coarse alveoli. angles in the second to the sixth volution Average thickness of the spiro theca in are 18, 20, 29, 38 and 36 degrees, respe­ the first to the sixth volution is 0.03, 0.05, ctively. Septal counts in the second to 0.08, 0.09, 0.10 and 0.11 mm, respectively. the sixth volution of a specimen illus­ Septa are strongly fluted in polar regions, trated as fig. 7 on plate 19 are 16, 18, 20, but weakly fluted in central portion. 21 and 23, respectively. Septal counts in the second to the sixth Remarks: The present specimens are volution for one specimen (pl. 19, fig. 4) characterized by their elongate fusiform are 20, 21, 22, 21 and 23, respectively. outline, less inflated central area, medium Average tunnel angles in the second to size of proloculus and mode of septal the fifth volution are 23, 22, 27 and 30 fluting. These features practically agree degrees, respectively. Chomata are gen­ with those of Triticites meeki (MoLLER). erally asymmetrical in shape, but in­ Triticites meeh is very · similar to T. distinct in outer volutions. pajerensis ROBERTS in NEWELL, CHRONIC Remarks: The present species resem­ and ROBERTS (1953, p. 186, pl. 37, figs. 3- bles Triticites californicus THOMPON and 5) and T. cf. victoriensis DUNBAR and HAZZARD in THOMPSON, WHEELER and SKINNER by ROBERTS in NEWELL, CHRONIC HAZZARD (1946, p. 42, pl. 10, figs. 10-14) ahd ROBERTS (1953, p. 191, pl. 37, fig. 8). in inflated fusiform shape, medium size However, it seems to have more weakly of proloculus, mode of septal fluting, fluted septa than the two species. They narrow tunnel angles and asymmetrical may belong to Triticites meeki. chomata. However, the former differs

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from the latter as follows. (1) The is 0.07, 0.08, 0.12 and 0.12 mm, respectively. septal counts of the former are less Spirotheca consists of a tectum and numerous than the latter. (2) The former keriotheca. Its thickness in the third to shows smaller form ratio than the latter. fifth volution is 0.03, 0.04 and 0.06 mm, (3) The chomata of the former in outer respectively. Septa are highly fluted in volutions are indistinct. The present polar regions, but they become weakly specimens are also similar to the original fluted towards the middle portion. Cho­ specimens of Triticites pinguis DUNBAR mata asymmetrical in shape, but indis­ and CONDRA (1937, p. 620, pl. 47, figs. 12- tinct in outer volutions. Tunnel angles 19), but differs from them in having less in the second to the fourth volution are numerous septal counts, indistinct cho­ 12, 20 and 23 degrees, respectively. mata in outer volutions, larger form ratio Remarks: This form is represented and smaller proloculus. They are some­ only by one axial section. It somewhat what related to Triticites pinguis by resembles the specimens described as SABINS and Ross (1963, p. 343, pl. 36, Triticites titicacaensis by ROBERTS in figs. 6-12) and Ross (1963, p. 109, pl. 6, NEWELL, CHRONIC and ROBERTS (1953, p. figs. 1, 3-4). However, they have more 182, pl. 36, figs. 19-20) and as T. aff. loosely coiled shell and indistinct chomata titicacaensis by MAEDA, Y AMAGIW A, BEL­ in outer volutions. They are distingui­ LIDO and RANGEL (1974, p. 9, pl. 1, fig. 4). shed from Triticites cf. plummeri DUNBAR However, those specimens have more dis­ and CoNDRA (SABINS and Ross, 1963, p. tinct chomata than the present specimen. 347, pl. 36, fig. 7) in having more loosely Six original specimens of Triticites coiled shell and broader tunnel angles. titicacaensis described by DuNBAR and Occurrence: Limestone at the south of NEWELL (1946, p. 479, pl. 11, figs. 1-6) Pampa Lobos, Chaparra area, Southwest distinctly differs from the above men­ Peru. The present specimens are as­ tioned specimens containing the present sociated with Triticites cellamagnus, T. one in having strongly fluted septa ;neeki, T. sp. B and Durhamina? andensis throughout the shell. Therefore, the lat­ n. sp. ter specimens must be excluded from Repository: Reg. nos. NSM-MPC 1845, Triticites titicacaensis. The original speci­ 1846, 1847 (National Science Museum). mens of Triticites titicacaensis were form­ erly transferred to the genus Schwagerina by the strongly fluted septa (THOMPSON Triticites sp. B and MILLER, 1949, p. 3). But the writers Plate 19, fig. 8 consider that they may belong to the genus Dunbarinella than the genus Shell is small in size, inflated fusiform Schwagerina in view of the distinct in shape, with straight axis of coiling chomata and strongly fluted septa. and bluntly pointed poles. Lateral slopes Occurrence: Limestone at the south of of mature shell slightly convex. A Pampa Lobos, Chaparra area, Southwest specimen (pl. 19, fig. 8) of five and a half Peru. This form is associated with volutions is 2.9 mm in length and 1.7 mm Triticites cellamagnus, T. meeki, T. sp. A in width, giving a form ratio of about and Durhamina? andensis n. sp. 1.7. Proloculus is spherical in shape, with Reposdory: Reg. no. NSM-MPC 1851 outside diameter of 0.18 mm. Height of (National Science Museum). chambers in the second to fifth volution

NII-Electronic Library Service 140 Nobuo YAM AGIWA and Cesar RANGEL Z.

Order Rugosa MILNE-EDWARDS Dissepimentarium is rather narrow and and HAIME, 1850 generally arranged in pseudoherring bone dissepiments, but sometimes in concentric Family Durhaminidae MINATO ones and rarely in lonsdaleoid ones. It and KATO, 1965 is very narrow in early mature ones. Inner wall is often seen around the inner Genus Durham-ina WILSON part of the dissepimentarium. In mature and LANGENHEIM, 1962 stage, axial structure is cobweb structure in shape and small in size, about 1/6 the Durhamina? andensis n. sp. diameter of a corallite. It is composed Plate 20, figs. 1-6 of a few septal lamellae, axial tabellae and a long median plate. The septal Corallum is compound and fasciculate. lamellae in contact with the major ones. Corallites are in contact in many points. In early mature stage, the axial structure In transverse section, the corallites is simple and irregular ; septal lamellae show round to subpolygonal outlines ow­ mostly unite with some major ones. ing to their contactness to the neighbor­ In longitudinal section, dissepiment­ ing ones (pl. 20, figs. 4-6). Mature speci­ arium is narrow and composed of globose mens are often more than 15.0 mm in and elongate dissepiments with their diameter (pl. 20, fig. 1). External wall is convex sides inwards. Tabularium is relatively thin. Sapta are in two orders, broad, consists of tabulae and axial struc­ major and minor, alternating, showing ture. Tabulae are incomplete and com­ more or less sinuous or nearly straight. posed mostly of long vesicles with their They show the diffuso-trabeqular or the convex sides generally upwards and out­ fibro-normal types under microscope. wards, ascending to the axial structure. Major ones are about 30 in number in Clinotabulae rarely present. In axial mature stage (pl. 20, fig. 1), but 20 to 28 structure, dome-like axial tabellae, edges in number in early mature ones (pl. 20, of septal lamellae and a median plate figs. 2, 4-6) ; they are thick in middle are seen. part and thinner towards both ends, but Remarks: The present form is very become thick at proximal end. Minor similar to the species of the genus ones are very short, sometimes lacking. Heritschioides in having tabulae composed

Explanation of Plate 19

Fig. 1. Triticites cellamagnus THOMPSON and BissEL 1. Axial section ...... x 13.0 (NSM-MPC 1844) Figs. 2-4. Triticites sp. A 2. Axial section ...... x 13.0 (NSM-MPC 1845) 3. Axial section ...... x 13.0 (NSM-MPC 1846) 4. Sagittal section ...... x 13.0 (NSM-MPC 1847) Figs. 5-7. Triticites meeki (MoLLER) 5. Axial section ...... ; ...... x 13.0 (NSM-MPC 1848) 6. Axial section ...... x 13.0 (NSM-MPC 1849) 7. Sagittal section ...... x 13.0 (NSM-MPC 1850) Fig. 8. Triticites sp. B 8. Axial section ...... x 13.0 (NSM-MPC 1851)

NII-Electronic Library Service Y AMAGIWA and RANGEL: Late Paleozoic fossils in Peru Plate 19

NII-Electronic Library Service 706. Late Paleozoic fossils in Peru 141

of vesicles with their convex sides up­ logia del Cuadrangulo de Atico. Com. wards and outwards in longitudinal sec­ Cart. Geol Nac., vol. 1, no. 2, p. 1-59. tion. However, it may beleng to the BRILL, K. G. (1963) : Permo-Pennsylvanian genus Durhamina then the genue Herits­ stratigraphy of western Colorado Plateau chioides in having simple axial structure and eastern Great Basin regions. Geol. Soc. America, Bull. vol. 74, p. 307-330, 1 in early mature stage, narrow dissepi­ pl., 17 figs. mentarium, lonsdaleoid dissepiments and CAssiTY, P. E. and LANGENHEIM, R. L. (1966) : very short minor septa. It closely re­ Pennsylvanian and fusulinids of sembles Durhamina? uddeni (Ross and the Bird Spring Group from Arrow Canyon, Ross, 1963, p. 415, pl. 49, figs. 5-9; MINATO Clark County, Nevada. ] our. Paleontology, and KATO, 1965, p. 38) in the following vol. 40, p. 931-968, pis. 110-114, 6 figs. characters. (1) Medium size of corallites. DuNBAR, C. 0. and CoNDRA, G. E. (1927) : The (2) Long median plate in axial structure fusulinidae of the Pennsylvanian System in mature stage. (3) Neighboring coral­ in Nebraska. Nebr. Geol. Survey, 2nd lites are often in contact. (4) Pseudoher­ ser., Bull. 2, 135 p., 15 pis., 13 figs. ring bone dissepiments present. (5) Tab­ DuNBAR, C. 0. and NEWELL, N.D. (1946) : ulae ascending to the axial structure in Marine early Permian of the central Andes and its fusuline faunas. Amer. jour. Sci., longitudinal section. However, the former vol. 244, p. 377-402, 457-491, pls. 1-12. is distinguishable from the latter in hav­ DuNBAR, C. 0. and SKINNER, ]. W. (1937) : ing inner wall around the inner part of Permian Fusulinidae of Texas in The the dissepimentarium and shorter minor Geology of Texas. Univ. Texas, Bull. septa. It is also similar to Durhamina 3701, p. 517-825, pls. 42-81, figs. 89-97. hessensis (Ross and Ross, 1962, p. 1175, MAEDA, S., Y AMAGIWA, N., BELLIDo, E. and pl. 162, fig. 12, pl. 163, figs. 1-3, text-fig. RANGEL, C. (1974) : Some fusulinids from 4L; MINATO and KATO, 1965, p. 43, pl. 1, the Copacabana Group at Ambo, Peru, text-figs. 9-10) in many respects, but the South America. Palaeontological study of former differs from the latter in having the And-es (Geol. Labor., Fac. Sci., Chiba long median plate in axial structure and Univ.) ,p. 1-13, pl. 1. MEEK, F. B. and HAYDEN, F. V. (1858): Re­ tabulae ascending to the axial structure marks on the Lower beds of in longitudinal section. According to Kansas and Nebraska, together with des­ ROWETT (1971), the species belonging to criptions of some new species of Carboni­ the family Durhaminidae occurs in the ferous fossils from the valley of the Lower Permian in Peru, but is not yet Kansas River. Acad. Nat. Sd. Phila., described. Proc., vol. 10, p. 256-266. Occurrence: Limestone at the south of MEEK, F. B. and HAYDEN, F. V. (1865) : Pal­ Pampa Lobos, Chaparra area, Southwest eontology of the Upper Missouri. Smi­ Peru. The associated fossils are Triticites thsonian Contr. Knowledge, vol. 14, p. 1- cellamagnus, T. meeki, T. sp. A and T. 135, pis. 1-5. sp. B. MrNATO, M. and KATO, M. (1965) : Durhami­ nidae. ] our. Fac. Sci., Hokkaido Univ., Repository: Reg. nos. NSM-PA 11999 ser. 4, vol. 13, no. 1, p. 11-86, pls. 1-5. (holotype), 12000, 12001 (National Science MoLLER, Valerian von (1879) : Die Foramini­ Museum). feren des russischen Kohlenkalks. Akad. Imp. Sci. St. Petersbourg Mem., 7e ser., References vol. 27, 131 p., 7 pis., 6 figs. NEWELL, N.D., CHRONic, ]. and RoBERTs, BELLIDO, E. and NARVAEZ, S. (1960): Geo- T. G. (1953) : Upper Paleozoic of Peru.

NII-Electronic Library Service 142 Nobuo Y AMAGIWA and Cesar RANGEL Z.

Geol. Soc. America. Mem. 58, 276 p., 44 Young Univ. Geol. Studies, vol. 8, p. 55- pls., 43 figs. 92, pls. 7-16, 2 figs. RowETT, C. L. (1971) : Paleogeography of STEINER, M. B. and WILLIAMS, T. E. (1968) : early Permian Waagenophyllid and Dur­ Fusulinidae of the Laborcita Formation haminid corals. Pacific Geology, 4, p. (Lower Permian), Sacramento mountains, 31-37. New Mexico. ]our. Paleontology, val. 42, Ross, C. A. (1963) : Standard Wolfcampian p. 51-60, pls. 11-13. Series (Permian), Glass mountains, Texas. THOMPSON, M. L. (1954) : American Wolfcam­ Geol. Soc. America, Mem. 88, 205 p., 29 pian fusulinids. Kansas Univ. Paleont. pis., 11 figs. Contr., Protozoa, art. 5, 226 p., 52 pls., Ross, C. A. and Ross, ]. P. (1962) : Pen­ 14 figs. nsylvanian, Permian rugose corals, Glass THOMP30N, M. L., DoDGE, H. Vv. and YouNG­ mountains, Texas. jour. Paleontology, QUisT, W. (1958) : Fusulinids from the vol. 36, p. 1163-1188, pls. 160-163. Sublett range, Idaho. jour. Paleontology, Ross, ]. P. and Ross, C. A. (1963) : Late val. 32, p. 113-125, pls. 17-20, 1 fig. Paleozoic rugose corals, Glass mountains, THOMPSON, M. L. and MILLER, A. K. (1949): Texas. jour. Paleontology, vol. 37, p. Permian fusulinids and cephalopods from 409-420, pls. 48-50. the vicinity of the Maracaibo basin in SABINS, F. F. and Ross, C. A. (1963) : Late northern South America. jour. Paleonto­ Pennsylvanian-early Permian fusulinids logy, val. 23, p. 1-24. from southeast Arizona. jour. Paleonto­ THOMPSON, M. L., WHEELER, H. E. and HAz­ logy, vol. 37, p. 323-365, pls. 35-40, 4 figs. ZARD, ]. C. (1946) : Permian fusulinids of SLADE, M. L. (1961) : Pennsylvanian and California. Geol. Soc. America, Mem. 17, Permian fusulinids of the Ferguson moun­ 77 p., 18 pis., 4 textfigs. tain area, Elko County, Nevada. Birgham

~~v ~ lffiwrl1~, 7-tr /~ 7 :ffu~vc?t1fi--t 0 J::1mJ!i:ttJ!f.giHl:l O)ifYJ~t9i!.:to J: lfJllflfM1tnv~ ---:::>", -c :

A,@], $~~v:t~;v~JffiWif$, 7-tr/~ 7t-fut~O)/~ /.?~ j:l $7-Wif:1Jvc?t1fi--t0 J::{ft)J!f:tt:!ff.!=f::tO) nER::Ei"il• t?, ORcHAUsKr 1Jtl5mlc J:-:> -c:f*~ ~ .:tvtd;\f-:1¥ *tiftJ:*J5~3i!.u J: lfJllfllli!Htn~Wf:Je L ko k-O)~~J'i*, if';IJ~;E_{I::,n c L 'L Triticites cellamagnus, T. meeki, T. sp. A :to J: lf T. sp. B, JllflfM{tn c L 'L Durhamina ? andensis n. sp. ~~Ji!,, ~i3~¥1ii!f-t 0 c ~vc, -t-.:h t? O){t,1j;g=-f~O)~~iJ::VJjtJj Wolfcampian ~~~ Li:lb-j'-;:. l: ~~tfn;lffi Lf..:o llJ~M;:;fc • C. RANGEL

Explanation of Plate 20

Figs. 1-6. Durhamina? andensis n. sp. 1. Transverse section ...... x 5.0 (NSM-P A 11999a) 2. Transverse section ...... x 5.0 (NSM-PA 11999b) 3. Longitudinal section ...... x 5.0 (NSM-PA 11999c) 4. Transverse section ...... x 5.0 (NSM-PA 12000a) 5. Transverse section ...... x 5.0 (NSM-PA 12000b) 6. Transverse section ...... x 5.0 (NSM-P A 12001)

NII-Electronic Library Service YAM AGIWA and RANGEL: Late Paleozoic fossils in Peru Plate 20

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