Published September 9, 2013
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TABLE 2 in Planktonic ostracods (Myodocopa: Halocyprididae) from abyssopelagic depths in the Atlantic, North Pacific and Gulf of Oman: Chavturia abyssopelagica (n. gen., n. sp.), Halocypretta profunda (n. sp.), Halocypretta parvirostrata Chavtur and Stovbun, 2008 and Halocypretta striata (Müller, 1906)
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Description
TABLE 2. Comparison of meristic characters of male and female Chavturia abyssopelagica n. sp., Halocypris parvirostrata Chavtur & Stovbun, 2008, H. profunda n. sp. and H. striata (Müller, 1906). Characters that distinguish C. abyssopelagica from the Halocypretta species are italicised, and those that in combination distinguish between the three Halocypretta species are emboldened.
| Character | C. abyssopelagica | H. parvirostrata | H. profunda | H. striata | ||||
|---|---|---|---|---|---|---|---|---|
| Female | Male | Female | Male | Female | Male | Female | Male | |
| Carapace: | ||||||||
| Length range (mm) | 3.12– 3.72 | 3.16– 3.48 | 3.48 | 2.7–3.3 | 3.44 | 3.16 | 2.60–2.96 | 2.56–2.88 |
| Height:length ratio (%) | 58.4 | 57.5 | 60.3 | 69.8 | 66.3 | 60.8 | 58.9 | 58.8 |
| Breadth:length ratio (%) | 39.3 | 40.2 | 49.1 | no data | 67.4 | no data | 56.2 | 51.5 |
| Rostrum (% CL) | 11.7 | 10.2 | 12.1 | 14.0 | no data | 18.4 | 10.2 | 9.7 |
| Incisure (% CL) | 8.5 | 7.5 | 3.5 | 8.0 | 18.4 | 10.0 | 8.3 | 6.2 |
| LAG | near PDC | near PDC | near PDC | near PDC | near PDC | near PDC | near PDC | near PDC |
| RAG | > PVC | > PVC | at PVC | at PVC | > PVC | no data | at PVC | at PVC |
| Frontal organ: | ||||||||
| Stem (% CL) | 15.5 | 13.8 | 6.0 | 4.3 | 6.3 | 6.5 | 6.0 | 5.0 |
| Capitulum (% CL) | 12.9 | 11.9 | 21.5 | 22.8 | 20.8 | 21.3 | 22.4 | 23.6 |
| First antenna: | ||||||||
| Limb (% CL) | 16.2 | 14.9 | 14.3 | no data | no data | no data | 13.9 | 14.9 |
| Dorsal seta (% CL) | 6.3 | 4.9 | 4.0 | 3.4 | 3.9 | 3.9 | 4.0 | 3.8 |
| a–d setae (% CL) | 29.0 | 22.4 | 26.8 | 30.5* | 29.6 | 32.9 | 27.5 | 33.0 |
| e-seta (% CL) | 46.3 | 47.8 | 58.2 | 60.9 | 64.9 | 67.4 | 58.3 | 66.0 |
| Second antenna: | ||||||||
| Protopodite (% CL) | 25.1 | 28.6 | 25.9 | 32.6 | 27.5 | 30.2 | - | 32.9 |
| Exopodite 1 (% CL) | 26.9 | 26.6 | 29.9 | 33.2 | 33.3 | 31.6 | 28.5 | 32.6 |
| Exopodite 2–9 (% CL) | 7.9 | 6.8 | 6.9 | 7.4 | 12.2 | 10.2 | 9.5 | 9.2 |
| Swimming seta (% CL) | 54.2 | 49.3 | 58.2 | 67.3 | 58.6 | 64.4 | 64.0 | 42.5 |
| f-seta (% CL) | 44.2 | 39.4 | 53.7 | 47.1 | 52.9 | 55.2 | >49.8 | 48.8 |
| g-seta (% CL) | 53.4 | 58.5 | 63.8 | 69.4 | 64.9 | 70.4 | 71.2 | >63.9 |
| h–j setae (% CL) | 26.9 | 23.9 | 32.2 | 19.4 | 28.7 | 34.5 | 30.0 | 31.0 |
| Mandible: | ||||||||
| Long terminal seta (% CL) | 21.6 | 19.4 | 22.4 | 16.1 | 22.6 | no data | >22.4 | no data |
| Fifth limb: | ||||||||
| Long terminal seta (% CL) | 11.5 | 11.3 | 10.1 | 13.3 | 10.3 | 10.3 | 11.7 | 10.5 |
| Sixth limb: | ||||||||
| Long terminal seta (% CL) | 18.3 | 16.4 | 14.6 | 14.2 | 13.9 | 13.8 | 14.2 | 13.6 |
| Caudal furca: | ||||||||
| Long terminal seta (% CL) | 19.4 | 19.4 | no data | 16.6 | 16.6 | no data | 14.9 | no data |
| Copulatory organ: | ||||||||
| Length (% CL) | 20.9 | 29.4 | 25.3 | 21.4 | ||||
| Breadth:length ratio (%) | 35.7 | 22.6 | 18.1 | 21.3 | ||||
| No. muscles | 6 | 6 | 3 | 6 |
* Value estimated from Chavtur and Stovbun (2008) figure 1C.
Notes
Published as part of Angel, Martin V., 2013, Planktonic ostracods (Myodocopa: Halocyprididae) from abyssopelagic depths in the Atlantic, North Pacific and Gulf of Oman: Chavturia abyssopelagica (n. gen., n. sp.), Halocypretta profunda (n. sp.), Halocypretta parvirostrata Chavtur and Stovbun, 2008 and Halocypretta striata (Müller, 1906), pp. 420 in Zootaxa 3709 (5) on page 420, DOI: 10.11646/zootaxa.3709.5.1, http://zenodo.org/record/222440
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Additional details
Identifiers
References
- Chavtur, V. G. & Stovbun, G. G. (2008) New genus and a new species of pelagic ostracods of the subfamily Halocypridinae from the North Pacific. Publications of the Seto Marine Biological Laboratory, 40, 47 - 54.
- Muller, G. W. (1906) Ostracoda. Wissenschaftliche Ergebnisse der Deutschen Tiefsee-Expedition ' Valdivia' 1989 - 1899, 8, 29 - 154. http: // dx. doi. org / 10.5962 / bhl. title. 2171