Youngiellacea

(Left to right) right, left, interior of left and interior of right valves of Moorites tumidus, from Hoare & Merrill (2004).

Belongs within: Ostracoda.

The Youngiellacea are a group of very small ostracods known from the Upper Devonian and Carboniferous periods (Benson et al. 1961).

Characters (from Benson et al. 1961): Carapace minute, suboblong, with straight taxodont hinge bearing vertical teeth and sockets. Surface smooth, reticulate or ridged.

<==Youngiellacea BB61
    |  i. s.: Schweyerina Zaspelova 1952 BB61
    |           |–*S. ovata Zaspelova 1952 BB61
    |           `–S. normalis BB61
    `–Youngiellidae BB61
         |–Youngiella Jones & Kirkby 1895 [=Youngia Jones & Kirkby 1886 non Lindström 1885] BB61
         |    `–*Y. rectodorsalis (Jones & Kirby 1886) BB61, HM04 [=*Youngia rectidorsalis BB61]
         |–Glyptopleuroides Croneis & Gale 1938 BB61
         |    `–*G. insculptus Croneis & Gale 1938 BB61
         |–Moorea Jones & Kirkby in Jones & Holl 1869 M61, BB61
         |    `–*M. silurica Jones & Holl 1869 BB61
         |–Kelletella Delo 1930 (n. d.) M61, BB61
         |    `–*K. naviculata Delo 1930 BB61
         `–Moorites Coryell & Billings 1932 [incl. Hardinia Coryell & Rozanski 1942] BB61
              |–M. minutus (Warthin 1930) [=Glyptopleurina minuta; incl. *M. hewetti Coryell & Billings 1932] BB61
              |–M. elongatus (Jones & Kirby 1886) HM04
              |–M. erugatus Hoare 1998 HM04
              `–M. tumidus Hoare & Merrill 2004 HM04

*Type species of generic name indicated

REFERENCES

[BB61] Benson, R. H., J. M. Berdan, W. A. van den Bold, T. Hanai, I. Hessland, H. V. Howe, R. V. Kesling, S. A. Levinson, R. A. Reyment, R. C. Moore, H. W. Scott, R. H. Shaver, I. G. Sohn, L. E. Stover, F. M. Swain & P. C. Sylvester-Bradley. 1961. Systematic descriptions. In: Moore, R. C. (ed.) Treatise on Invertebrate Paleontology pt Q. Arthropoda 3: Crustacea: Ostracoda pp. Q99–Q421. Geological Society of America and University of Kansas Press.

[HM04] Hoare, R. D., & G. K. Merrill. 2004. A Pennsylvanian (Morrowan) ostracode fauna from Texas. Journal of Paleontology 78 (1): 185–204.

[M61] Moore, R. C. 1961. Supplement—USSR treatise on Ostracoda. In: Moore, R. C. (ed.) Treatise on Invertebrate Paleontology pt Q. Arthropoda 3: Crustacea: Ostracoda pp. Q422–Q429. Geological Society of America and University of Kansas Press.

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