178 



UNITED STATES NATIONAL MUSEUM BULLETIN 215 



Systematic Descriptions 



Family Heterohelicidae Cushman, 1927 



Subfamily GuembeUtriinae Montanaro GaDiteUi, 

 1957 



Genus Woodringina Loeblich and Tappan, 1957 



'Woodringina claytonensis Loeblich and Tappan 



Plate 40, Figure 6 



Woodringina claytonensia Loeblich and Tappan, Jonrn. Wash. 

 Acad. Sci. voL 47, p. 39, figs, la-d, 1957. 



Test free, tiny, flaring rapidly; early stage with a 

 single whorl of three chambers (reduced "triserial"), 

 commonly followed by three, or more rarely up to five, 

 pairs of biserial chambers, the plan of biseriality 

 slightly twisted in development; chambers few in 

 number, subglobular, tacreasing rapidly ia size; sutures 

 distinct, constricted; wall calcareous, finely perforate 

 and very finely hispid; aperture a low, arched sHt 

 bordered above by a shght lip, somewhat asymmetrical 

 in position. 



Length of holotype 0.15 mm., greatest breadth 0.12 

 mm. Other specimens vary from 0.12 to 0.22 mm. in 

 length. 



Remarks: This species superficially resembles Tosaia 

 hanzavxii Takayanagi from the PHocene of Japan, but 

 differs m being about one-third as large, ia having a 

 reduced "triserial" stage of three chambers, and better 

 developed biserial stage, whereas the Japanese form 

 has a trochoid whorl, followed by a triserial stage, and 

 only an occasional specimen has the poorly developed 

 biserial stage. The chambers of the present species 

 are also more inflated and subglobular. 



Types and occuerence: Holotype (USNM P5685) 

 from the Pine Barren member of the Clayton formation, 

 blue-black micaceous clay exposed in road cut opposite 

 small country store, 0.8 nule west of Alabama River 

 bridge on Albama state highway 28, Wilcox County, 

 Alabama. Collected by Alfred R. Loebhch, Jr., July 

 1956. 



Subfamily HeteroheHcinae Cushman, 1927 



Genus Heterohebx Ehrenberg, 1841 



HeteroheUx wilcoxensis (Cushman and Ponton) 



Plate 56, Figures 2a, b 



Giimhelina wilcoxensis Cushman and Ponton, Contr. Cushman 

 Lab. Foram. Res., vol. 8, pt. 3, p. 66, pi. 8, figs. 16, 17, 

 1932. 



Test free, small, flaring rapidly, with 3 to 5 pairs of 

 nearly globular chambers biserially arranged; sutures 

 distinct, deeply depressed; wall calcareous, finely but 

 distinctly perforate, with perforations aUgned in very 

 fine longitudinal striae; aperture a broad symmetrical 

 and relatively high arch. 



Length of figured hypot3rpe 0.18 mm. 



Remarks: The figured specimen is only about one- 

 half the size of the holotype, but may be a juvenile 

 specimen as it is identical in all characters to the earlier 

 portion of the holotype. This species is characterized 

 by the perforations aUgned in fine longitudiaal striae, 

 the globular chambers, and flaring test. 



Types and occurrence: Figured hypotype (USNM 

 P5834) from the Aquia formation, 10 to 13 feet above 

 the base of the exposure, west bank of Potomac River, 

 near mouth of Aquia Creek, S. 10° E. of Brent Point on 

 U. S. Geological Survey Nanjemoy Md.-Va. Quadrangle, 

 1:62,500, 1913, reprinted 1945. Collected by A. R. 

 Loebhch, Jr., and Richard A. Page. 



Genus Chiloguembelina Loeblich and Tappan, 1956 



Chiloguembelina crinita (Glaessner) 



Plates 49, Figure 1; 51, Figures la-3; 56, Figures la, b; 

 60, Figure 6; 62, Figure 1 



Gumhelina crinita Glaessner, Probl. Paleontol., Moscow Univ. 



Lab. Paleontol., vol. 2-3, p. 383, pi. 4, figs. 34a, b, 1937. 

 Gumhelina vnlcoxensis Cushman and Ponton, Shifflett, Mary- 

 land Dep. Geo]., Mines and Water Resources Bull. 3, p. 60, 

 pi. 3, fig. 8, 1948. 



Test free, small, flaring rapidly; 4 to 6 pair of biser- 

 ially arranged chambers slightly twisted in development, 

 early chambers relatively low and broad, later ones 

 higher and ovate to subglobular; sutures distinct, de- 

 pressed, straight and shghtly oblique; wall calcareous, 

 finely perforate, surface smooth in the early part, with 

 the terminal part finely hispid; aperture a broad open 

 arch, with a narrow hp at one side expanding into a 

 broad apertural flange at the opposite edge, causing 

 the aperture to be directed toward one of the flat sides 

 of the test. 



Hypotypes range from 0.20 to 0.30 mm. in length. 



Remarks: This species differs from C. midvxiyensis 

 (Cushman) in being more flaring, in having higher and 

 more globose chambers and a finely spinose wall, espe- 

 cially in the terminal portion. 



It diEFers from C. morsei (Kline) in having a more 

 flared and more twisted test, and in the early chambers 

 being broad and low, only the later ones becoming in- 

 flated. The apertural flange is also more prominent at 

 one side of the aperture in the present species. 



The specimen referred to Qumhelina wilcoxensis 

 Cushman and Ponton by Shifflett (1948, p. 60) also be- 

 longs to the present species, and differs from Hetero- 

 helix wilcoxensis (Cushman and Ponton) in lacking the 

 symmetrical aperture characteristic of true Heterohelix. 

 Heterohelix wilcoxensis also is a much larger and more 

 robust species, with more nearly globular chambers. 



Types and occtrRRENCE: Figured hypotypes (USNM 

 P5115a-c) from the Vincentown limesand, along north 

 bluff of Rancocas Creek, 0.3 to 0.5 mile northwest of 

 Vincentown, Burlington County, New Jersey. Col- 

 lected by A. R. Loeblich, Jr., and Norman SoM. 



