Trans. Proc. Palaeont. Soc. Japan, N. S., No. 115, pp. 135-142, pis. 19, 20, Sept. 30, 1979 706. SOME INTERESTING FOSSILS 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 fossil 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 limestone exposed at the south of campian Bursum Formation 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 Pennsylvanian 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 NII-Electronic Library Service 706. Late Paleozoic fossils in Peru 137 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.