Recently during the preparation of a comprehensive account of the lake plankton (Hutchinson, in press) a rather unfortunate case of homonymy was discovered in the genus Cypria

Ferguson, Edward, Jr.

Goulden, Clyde E.

Hutchinson, G. Evelyn

English

Yale University

POSTILLA   Published from 1950 to 2004, the short papers of the Postilla series reported on original research by the Yale Peabody Museum of Natural History’s curators, staff, and research associates, and their colleagues, in the natural science disciplines represented by the collections of the Museum’s curatorial divisions.  The Postilla series, which ceased publication with Number 232 (2004), was incorporated into the journal Bulletin of the Peabody Museum of Natural History, available from BioOne Complete at https://bioone.org/.  Yale Peabody Museum scholarly publications are archived through EliScholar,  a digital platform for scholarly publishing provided by Yale University Library at https://elischolar.library.yale.edu/.                   This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. https://creativecommons.org/licenses/by-nc-sa/4.0/     P.O. Box 208118 | New Haven CT 06520-8118 USA | peabody.yale.edu PEABODY M U S E U M OF NATURAL HISTORY Y A L E UNIVERSITY Number 80 May 27, 1964 New Haven, Conn. CYPRIA PETENENSIS, A NEW NAME FOR T H E OSTRACOD CYPRIA PELAGICA BREHM 1932 EDWARD FERGUSON J R . 1 LINCOLN UNIVERSITY OF MISSOURI, JEFFERSON CITY G. EVELYN HUTCHINSON, YALE UNIVERSITY, NEW HAVEN, CONN. CLYDE E. GOULDEN, YALE UNIVERSITY, NEW HAVEN, CONN. Recently during the preparation of a comprehensive account of the lake plankton (Hutchinson, in press) a rather unfor-tunate case of homonymy was discovered in the genus Cypria. In 1932 Brehm brought forward the name Cypria pelagica for a planktonic species from Laguna-de Peten, Guatemala. Brehm mentioned several characters of the species and com-mented that they suggest "Beziehungen zu der sudamerikanis-chen Cypria pellucida Sars." Since his remarks merely indi-cate apparent affinities with pellucida but unhappily contain no "statement that purports to give characters.differentiating the taxon," the name pelagica Brehm (1932) appears to be, under Article 13a of the International Code, invalid and must be treated as a nomen nudum, 1 Research supported by National Science Foundation Grant GB-1534. 2 Postilla Yale Peabody Museum No. 80 In the next year Klie (1933) published a description of Cypria javana subspec. pelagica from lakes in J a v a and Bal i , which is a p p a r e n t l y identical with a pelagic species from the Lake of Colombo erroneously identified by Apste in (1907) as Cypris purpurascens B r a d y . Whatever the s t a tus of Klie's form may be, the name pelagica was validly proposed as subspecific, and in view of the invalidity of Brehm's use of pelagica in the previous year , cannot be used for any other subsequently des-cribed Cypria. Brehm (1939) re turned to the problem and gave an illus-t r a t e d descript ion of Cypria pelagica, presumably based on the mater ia l to which he had referred in 1932. Recent ly we have had the o p p o r t u n i t y to examine specimens of what is doubtless the same species, collected in the L a g u n a de Peten by D r s . Georgi-ana B . and E d w a r d S. Deevey. In view of the h i s to ry of the species a new specific name is clearly required. FAMILY CYPRIDAE Baird 1845 GENUS CYPRIA Zenker 1845 Cypria petenensis n. sp. Figs. 1-6 Specific characters: FEMALE—Eye prominent. Valves translu-cent, surface with scattered hairs and without other ornamentation. anterior and posterior margins with sparsely placed hairs; shell seen from the side boldly arched, greatest height near middle, ante-rior and posterior margins broadly rounded, ventral margin of right valve convex, that of left slightly concave; length of valves 0.52 mm—0.53 mm, height 0.31 mm—0.32 mm. Natatory setae of second antennae reaching beyond tips of end-claws by more than twice the length of the claws; distal end of antepenultimate podomere bearing a short seta with an elongate plumose terminal portion; olfactory club apparently with four segments. Mandibular palp is a very striking structure, respiratory plate with five prominent setae; ante-penultimate and penultimate podomeres with long, plumose setae on ventral margins; ultimate podomere with two smooth spines and a longer two-segmented spine bearing two lateral rows of short setae at tip. Proximal podomere of maxillary palp very wide and bearing four long setae on laterodistal margin; width of distal podomere equal to length with three pectinated spines; spines of Cypria petenensis n. sp.—Drawings of figures 1, 3, 4, 5, and 6 were made from the female holotype stained with lignin pink and mounted in polyvinyl lactophenol. The drawing of figure 2 was made from the androtype stained in a 1% alcoholic solution of eosin Y and mounted in Canada balsam. 1. Second antenna of female holotype. 2. Lateral view of right valve of androtype. 3. Maxilla and maxillary palp of female holotype. 4. Furcal ramus of female holotype. 5. Mandibular palp of female holotype. 6. Third thoracic appendage of female holotype. 4 Postilla Yale Peabody Museum No. 80 all three masticatory processes two-segmented and smooth. Ultimate podomere of third thoracic appendage with two short setae of unequal lengths and a long^ reflexed seta equal to the combined lengths of the antepenultimate^ penultimate and ultimate podo-meres; terminal margin of penultimate podomere with a patch of setae. Furcal ramus strongly developed, stout, length approximately 10X least width; dorsal seta shorty occasionally inconspicuous and removed from the subterminal spine by the length of spine; ter-minal and subterminal spines pectinated; length of subterminal spine about eight-tenths that of terminal; terminal seta one-third length of subterminal spine. MALE—Valves similar to those of female. Testes extend as cir-cuitous bands along margins of valve. Prehensile palps of first thoracic appendages dissimilar; penis triangular. Males appear in numbers equal to females. Type locality: The type specimens were collected on March 10, 1961 by Drs. Georgiana and Edward S. Deevey from the Laguna de Peten, Guatemala. Type spec imens : Microscopic mounts of the holotype and andro-type are deposited in the Yale Peabody Museum (YPM 5670, 5671). Paratype male and females have been deposited in the British Museum (Natural History) and the Zoologisches Museum, Ham-burg, Germany. REFERENCES Apstein, C, 1907. Das Plankton im Colombo-See auf Ceylon. Zool. Jahrb. (Abt. Syst.) 25:201-244. Brehm, Vinzenz, 1932. Notizen zur Susswasserfauna Guatemalas und Mexikos. Zool. Anz. 99 (3-4) :63-66. —•—, 1939. Da Fauna Microscopica del Lago Peten, Guatemala. Anales de La Escuela Nacional de Ciencias Biologicas 1:173-204. Hutchinson, G. E. (in press) Treatise on Limnology, vol. II. John Wiley, New York and London. Klie, Walter, 1933. Die Ostracoden der Deutschen Limnologischen Sunday-Expedition. Archiv fur Hydrobiol. Suppl. 11:447-502. 

Cypria petenensis, a new name for the Ostracod Cypria pelagica Brehm 1932

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Cypria petenensis, a new name for the Ostracod Cypria pelagica Brehm 1932

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