Themistella fusca ( Dana, 1853 )

Gasca, Rebeca & Hendrickx, Michel E., 2021, Pelagic amphipods (Crustacea: Amphipoda: Hyperiidea) in western Mexico. 3 Family Lestrigonidae, Zootaxa 4974 (1), pp. 169-187 : 180-181

publication ID	https://doi.org/10.11646/zootaxa.4974.1.8
publication LSID	lsid:zoobank.org:pub:F2BE279E-5F7C-48E5-8D47-70974C8E9781
DOI	https://doi.org/10.5281/zenodo.4917713
persistent identifier	https://treatment.plazi.org/id/EC62878D-514F-BF34-FF0F-DCAEFEA70EAF
treatment provided by	Plazi (2021-05-19 09:43:33, last updated 2024-11-26 22:24:28)
scientific name	Themistella fusca ( Dana, 1853 )
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Themistella fusca ( Dana, 1853) View in CoL

Lestrigonus fuscus Dana, 1853: 983 View in CoL , pl. 67, fig. 8a

Themistella steenstrupi Bovallius, 1887: 23 View in CoL ; 1889: 313.

Themistella fusca View in CoL — Bowman, 1973: 66, fig. 51; Siegel-Causey, 1992: 195; Vinogradov et al., 1996: 400, fig. 173; Zeidler, 2004: 33; Brusca & Hendrickx, 2005: 150 (list); García Madrigal, 2007: 151 (list); Valencia & Giraldo, 2012: 1492 (tab. 1); Lavaniegos & Hereu, 2009: 139, 142 (tab. 1), 146 (tab. 2), 151 (Appendix 1).

Material examined. 2F, in two localities ( Fig. 7 View FIGURE 7 ). TALUD III. St. 19B (25°18’24”N, 109°18’36”W), August 20, 1991 GoogleMaps , 1F, I-K, from surface to 600 m (TD, 1890 m) (ICML-EMU-12811). TALUD VII. St. 36 (25°42’37”N, 110°04’35”W), June 9, 2001 GoogleMaps , 1F, MN, from surface to 1390 m (TD, 2400 m) (ICML-EMU-12812) .

Distribution. Atlantic, Pacific, and Indian oceans. In the eastern Pacific from off Baja California, Gulf of California, and south to off Guatemala and Nicaragua ( García Madrigal 2007).

Remarks. A commonly collected species in the central and southern Gulf of California, T. fusca has mostly been found in epipelagic layers ( Siegel-Causey 1982). Also found in the Mexican tropical Pacific ( Gasca et al. 2012).

Only two female specimens were found. Specimens measured about 2.5 mm in length. Five thoracic segments are fused; fourth segment partially free dorsally. Dactyli of pereopods VI and VII distinctively bent upwards. Telson small and rounded. There are only two other lestrigonids known to have five thoracic segments fused: L. bengalensis (male juveniles) and L. ducrayi Zeidler, 1992 which has a proportionally longer telson and a shorter pereopod 2 carpal process.

References

Bovallius, C. (1887) Systematical list of the Amphipoda Hyperiidea. Kungliga Svenska Vetenskapsakademiens Handlingar, 11 (16), 1 - 50.

Bovallius, C. (1889) Contribution to a Monograph of the Amphipoda Hyperiidea. Part I: 2. The Families Cyllopodidae, Paraphronimidae, Thaumatopsidae, Mimonectidae, Hyperiidae, Phronimidae, Anchylomeridae. Kongliga Svenska Vetenskapsakademiens Handlingar, 22 (7), 1 - 434.

Bowman, T. E. (1973) Pelagic amphipods of the genus Hyperia and closely related genera (Hyperiidea: Hyperiidae). Smithsonian Contributions to Zoology, 136, 1 - 76.

Brusca, R. C. & Hendrickx, M. E. (2005) Cap. 12. Crustacea 4. Lophogastrida, Mysida, Amphipoda, Tanaidacea & Cumacea. In: Hendrickx, M. E., Brusca, R. C. & Findley L. T. (Eds.), A Distributional Checklist of the Macrofauna of the Gulf of California, Mexico. Part I. Invertebrates. [Listado y Distribucion de la Macrofauna del Golfo de California, Mexico, Parte I. Invertebrados]. Arizona-Sonora Desert Museum, Tucson, Arizona, pp. 139 - 154.

Dana, J. D. (1853) Crustacea. Part II. United States Exploring Expedition. During the years 1838, 1839, 1840, 1841, 1842. Un- der the command of Charles Wilkes. U. S. N. C. Sherman, Philadelphia, 14, 689 - 1618.

Garcia Madrigal, M. S. (2007) Annotated checklist of the amphipods (Peracarida: Amphipoda) from the tropical eastern Pacific. Contributions to the Study of East Pacific Crustaceans, 4 (2), 63 - 195.

Gasca, R., Franco-Gordo, C., Suarez-Morales, E. & Godinez-Dominguez, E. (2012) Hyperiid amphipod community in the Eastern Tropical Pacific before, during, and after El Nino 1997 - 1998. Marine Ecology Progress Series, 455, 123 - 139. [http: // www. int-res. com / abstracts / meps / v 455 / p 123 - 139 /] https: // doi. org / 10.3354 / meps 09571

Lavaniegos, B. E. & Hereu, C. (2009) Seasonal variation in hyperiid amphipod abundance and diversity and influence of mesoscale structures off Baja California. Marine Ecology Progress Series, 394, 137 - 152. https: // doi. org / 10.3354 / meps 08285

Siegel-Causey, D. (1982) Factors determining the distribution of hyperiid Amphipoda in the Gulf of California. Ph. D. Thesis, University of Arizona, Tucson, Arizona, 535 pp.

Valencia, B. & Giraldo, A. (2012) Structure of hyperiid amphipod assemblages on Isla Gorgona, eastern tropical Pacific off Colombia. Journal of the Marine Biological Association of the United Kingdom, 92 (7), 1489 - 1499. https: // doi. org / 10.1017 / S 0025315411001780

Vinogradov, M. E., Volkov, A. F. & Semenova, T. N. (1996) Hyperiid amphipods (Amphipoda, Hyperiidea) of the world oceans. Oxonian Press Pvt. Ltd., New Delhi, 632 pp.

Zeidler, W. (2004) A review of the hyperiidean amphipod superfamily Phronimoidea Bowman & Gruner, 1973 (Crustacea: Amphipoda: Hyperiidea). Zootaxa, 567 (1), 1 - 66. https: // doi. org / 10.11646 / zootaxa. 567.1.1

Figures

FIGURE 7. Localities where Lestrigonus schoemakeri, Phronimopsis spinifera, and Themistella fusca were captured during this survey. x 2: two samples at same localities in different cruises.