Paranesidea

Maddocks, Rosalie F., 2015, New and poorly known species of Bairdoppilata and Paranesidea (Bairdiidae, Ostracoda) from French Frigate Shoals and O’ahu, the Hawaiian Islands, Zootaxa 4059 (2), pp. 277-317 : 310-311

publication ID

https://doi.org/ 10.11646/zootaxa.4059.2.3

publication LSID

lsid:zoobank.org:pub:3B0DAB43-FB07-4971-B3C5-F2005F7EE67A

DOI

https://doi.org/10.5281/zenodo.6096186

persistent identifier

https://treatment.plazi.org/id/943887AA-FFD6-FA74-239D-FA996C378174

treatment provided by

Plazi

scientific name

Paranesidea
status

 

Paranesidea View in CoL sp. 1

( Figs. 18–20 View FIGURE 18 View FIGURE 19 View FIGURE 20 )

Material. Four adult females.

Dimensions. Adult female 3968F, carapace measured before dissection: Length 984 µm, height 660 µm. See also Table 1 and Figures 2 View FIGURE 2 and 4 View FIGURE 4 .

Descriptive Comments. Carapace smooth, high-arched; subtriangular-subcircular in lateral outline, with continuously curving dorsal margin, lacking anterodorsal and posterodorsal corners; greatest height located at 0.47 of length; anterodorsal brim located at 0.04 of length and 0.61 of height; posterodorsal brim located at 0.97 of length and 0.39 of height; highest point of ventral indentation located at 0.38 of length and 0.05 of height. Slope (measured from horizontal) of anterodorsal margin 37o, of posterodorsal margin 52o, of dorso-caudal margin 49o, of hinge 11o. Caudal extension short, broad, nearly triangular, with indistinct posterodorsal break in slope. No patch pattern is visible in the decalcified carapace, but pigment spots are evident. The fused antennal claw is distinctly pectinate.

Comparisons. P. sp. 1 lacks the conspicuously punctate surface texture and caudate outlines of the several species of Paranesidea described from Nosy Be. The carapace dimensions of P. sp. 1 would be at the uppermost edge of the size range for females of P. spongicola and too large for most of the others.

P. sp. 1 cannot be identified with any of the species of “ Bairdia ” reported by Holden (1967) from Hawaii or with any of the four species of Paranesidea reported by Holden (1976) from the Lower Miocene of Midway Island. Its anteroventral margin slopes more steeply than that of P. sp. 1 of Holden (1976, Pl. 9, fig. 6), and the pigment spots are smaller and round, rather than dorsoventrally elongated. Its upright, nearly triangular lateral outline resembles that illustrated for P. sp. 2 of Holden (1976, Pl. 9, fig. 5), but it is substantially larger, with less produced anterodorsal and posterodorsal angles. It is larger than P. onslowensis and smaller than P. poseidonicola .

Kingdom

Animalia

Phylum

Arthropoda

Class

Ostracoda

Order

Podocopida

Family

Bairdiidae

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