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Bernard O. Lane 896 BERNARD 0 JOURNAL OF PALEONTOLOGY, VOL. 36 PLATE 126 Bernard O. Lane 896 BERNARD 0. LANE Tabulae may be present. When they are the Ely Limestone. These corals are small present, they are remote and often incom- ceratoid forms that strongly resemble plete. Triplophyllites, yet they have a narrow dis- Locality.—311 (figured specimen). 361. sepimentarium that presists into the upper regions of the corallum. These corals occur Family SYRINGOPORIDAE Milne-Edwards irregularly and their taxonomic position is & Haime uncertain. Genus SYRINGOPORA Goldfuss, 1826 SYRINGOPORA sp. Family LOPHOPHYLLIDIIDAE Moore & PI. 125, fig. 7 Jeffords This common genus is widespread in LOPHOPHYLLIDIUM aff. L. PROLIFERUM Paleozoic rocks of North America and oc- (McChesney, 1860) curs generally throughout the Ely Lime- Text-fig. 7 stone. The Ely specimens are assigned to no Two well preserved specimens of Lopho- species because the writer believes that a phyllidium show marked affinities with L. great deal of work must be done with proliferum. One specimen is 46 mm. long Syringopora before this genus can be of any and 18 mm. in diameter at the calyx. This notable stratigraphic value. specimen has the following septal formula: Locality.—312 K9A4C4A8, thus 29 major septa. Both Subclass TETRACORALLA specimens are exceptionally large for the genus; however, the septal configuration Family CYATHOPSIDAE Dybowski resembles that of L. proliferum. Genus CANINIA Michelin in Gervais, 1840 Locality.—309. CANINIA TORQUIA (Owen, 1852) Text-figs. 4-6 Class SCYPHOZOA Cyathophyttum torquium Owen, 1852, tab. 4, fig. Order CONULARIIDA Miller & Gurley 2. Caninia torquia (Owen), Easton, 1944, pi. 22, Family CONULARIIDAE Walcott figs. 2-7. CONULARIID PI. 128, fig. 27 Description.—Simple, cylindrical corallum with deep, straight-walled calyx. Floor of One specimen preserved as an external the calyx is flat without a boss. In trans- mold is referred to this group. The specimen verse section of one large specimen 42 mm. is fragmental and was collected from the in diameter, 48 major septa are present. base of the Ely Limestone. These septa are undilated and extend Locality.—313. slightly more than half of the distance to the Phylum BRYOZOA center of the corallite. Minor septa are short, Order CYCLOSTOMATA being about one-fourth as long as the major Family FENESTELLIDAE King septa. Dissepimentarium extends a little less Genus ARCHIMEDES Owen, 1838 than half the distance to the center of the corallum. Dissepiments occur in twelve to ARCHIMEDES sp. fourteen ranges, the first six or so being PI. 128, fig. 30 concentric and the innermost ones being Description.—Axis contains ten volutions arranged in a herringbone pattern. in a distance of 7.5 cm. Shaft is 2.9 mm. in In longitudinal section, tabulae are closely diameter at the base of the flange and 5.5 spaced, about ten in ten millimeters, flat- mm. at the top. The surface of the shaft is tened to gently depressed in the middle, and finely striate. Volution height averages 7.5 reflexed distally. mm. Discussion.—This Caninia is slightly Fronds are not attached to the spire of the larger than the typical C. torquia and has a specimen in this collection, although the wider dissepimentarium. spire rests in a hash of fenestellid debris. Fenestrules are elongate and bluntly rounded ? CANINIA sp. A at either end. Width of fenestrules is 3.5 mm. A few small corals that represent a transi- and the length-width ratio is three to one. tion from Triplophyllites to Caninia occur in Branches are narrow and closely spaced, FAUNA OF THE ELY GROUP, NEVADA 897 averaging 3.7 mm. in width. Dissepiments markings of which are like those of the are 1 mm. in width, smooth and set below pedicle valve. The apex stands 1.2 cm. high the surface of the frond. Apertures are in a shell 2.2 cm. long. The largest shell in rounded and alternately spaced on either this collection is a ventral valve which side of a strongly pronounced carina at a measures 3.1 cm. in length and 2.8 cm. in distance of about 0.3 mm. width. Discussion.—This species of Archimedes Locality.—313. occurs with the fusulinid, Fusulinella devexa of Middle Pennsylvanian age. It differs from Class ARTICULATA other species reported in post-Mississippian Order PROTREMIDA-TELOTREMIDA rocks primarily in the greater length of the Suborder ORTHINA volutions of this Archimedes. Superfamily ORTHICAE Locality.—318. Family RHIPIDOMELLIDAE Genus RHIPIDOMELLA Oehlert, 1890 Family RHABDOMESIDAE Vine RHIPIDOMELLA ELYENSIS, n. sp. Genus RHOMBOPORA Meek, 1872 PL. 125, figs. 11-16 RHOMBOPORA LEPIDODENDROIDES Meek, Description.—Shell is small, subovate in 1872 outline, about as wide as it is long. Greatest Rhombopora lepidodendroides Meek, 1872, p. 141, width is just anterior to the middle of the pl. 7, figs. 2a-f. shell. Shell subequally biconvex, brachial Description.—Branches are small averag- valve more or less evenly convex, anterior ing 2.5 mm. in diameter. Apertures are half of the pedicle valve is almost flat, be- elongate oval, 0.3 mm. in length and 0.15 coming gibbous in the umbonal region. Sur- mm. in width. Megacanthopores are promi- face of both valves is marked by numerous, nent and well developed, being about half hollow lirae, the openings of which produce the diameter of the apertures. Micropores a punctate surface. Lirae increase by inter- are present but are difficult to distinguish on calation. Along the line of commissure 70 weathered surfaces. to 110 lirations may be counted on mature Discussion.—This Rhombopora is some- specimens, the average being about four per what larger than typical representatives of millimeter. the species. However, its wide range Cardinal area of both valves is quite throughout the Ely Group limits its strati- small, that of the pedicle valve being in- graphic value. curved, whereas that of the brachial valve is almost in a plane with the line of commis- Phylum BRACHIOPODA sure. The hinge line is about one-fourth the Class INARTICULATA width of the shell. Dimensions of an average Family DISCINIDAE specimen are as follows: length 11 mm., Genus ORBICULOIDEA d'Orbigny, 1847 width 11 mm., thickness 4.8 mm. Sizes range ORBICULOIDEA CAPULIFORMIS from juvenile forms of 3 mm. in length to (McChesney, 1860) adult specimens 13 mm. in length. Pl. 125, figs. 8,9 Internally the pedicle valve bears large, Discina capuliformis McChesney, 1860, p. 72. flabellate diductor muscle scars that sur- Description.—Shell is subcircular in out- round an elevated platform which in turn line. Flattened pedicle valve has an elon- bears the slender adductor scars. Stout gated foramen which is bounded on either dental lamellae diverge and continue onto side by low, rounded ridges. Apex is low and the floor of the valve where they form a posterior. Growth lines appear distinctly slight ridge around the diductor scars. This flat and are wider at the apex than at the ridge is more pronounced along the anterior margins of the valve. In a shell 2.1 cm. in of the scar than along the lateral margins. diameter there are 31 growth lines in a dis- Muscle patterns of the brachial valve are tance of 1 cm. These lines appear occasion- small and indistinct. The cardinal process is ally to bifurcate and may result from ir- small and does not extend onto the floor of regular growth. the valve as in some species. Crural processes Brachial valve is an eccentric cone, the are stout and diverging. I 898 BERNARD 0. LANE Discussion.—Rhipidomella elyensis differs Suborder TEREBRATULINA from R. carbonaria (Swallow) in that R. Superfamily TEREBRATULICAE elyensis is larger, less gibbous and has finer Family DIELASMATIDAE and more closely spaced lirations. It differs Genus DIELASMA King, 1859 from Rhipidomella nevadensis (Meek) in that DIELASMA BOVIDENS (Morton, 1836) it is smaller than R. nevadensis and some- PI. 127, fig. 15 what less gibbous. Terebratula bovidens Morton, 1836, p. 150. Locality.—309. Discussion.—Two specimens from the lower Ely are assigned to this widely dis- Superfamily DALMANELLICAE tributed species on the basis of external form Family SCHIZOPHORIIDAE only. These large terebratulids appear to fit Genus SCHIZOPHORIA King, 1850 the concept of D. bovidens in shape, but the Discussion.—The diagnosis of Schizo- genus is based on internal features which phoria and Rhipidomella differ only slightly, were not observed in the specimens at hand. the characteristic difference being internal. Locality.—313. Schizophoria has a median septum and dental lamellae that extend onto the floor Family TEREBRATULIDAE of the shell, whereas Rhipidomella has no Genus CRANAENA Hall & Clark, 1893 median septum and the dental lamellae CRANAENA MINUTA, n. sp. surround the muscle scars as elevated ridges. PI. 127, figs. 16-21 Description.—Shell is typically terebratel- SCHIZOPHORIA RESUPINOIDES (COX, 1857) liform, biconvex and elongate with greatest PI. 125, figs. 17-19 width anterior to mid-region of the shell. Schizophoria resupinoides Cox, 1857, p. 570, pi. Anterior commissure is rectimarginate to IX, figs. 1—lb. uniplicate, beak incurved, pedicle foramen Description.—Shell is subquadrate in out- rounded. line, width about one-fourth greater than Brachial interior is characterized by a length. Valves subequally biconvex, the perforate, free hinge plate. The posterior end brachial valve being more gibbous than the of the plate is bluntly mucronate, and the pedicle. Hinge-line short, about one-third plate is wider than long—transversely ovoid. the width of the shell. Line of commissure The lateral portions are rounded, and there is distinctly resupinate. Pedicle valve bears is a slight reentrant along the lateral margin a broad, shallow sulcus. The surface of both of the plate. The perforation is elongate to valves is Urate. oval and is in the center of the plate. At On the interior of the pedicle valve two the perforation, the plate is deeply concave.
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