Pasiphaea major Hayashi, 2006

Rodrigues, Thaiana G. A. & Cardoso, Irene A., 2019, First record of four Pasiphaea Savigny, 1816 (Crustacea, Decapoda, Pasiphaeidae) species from the southwestern Atlantic, Zootaxa 4560 (2), pp. 321-330 : 323

publication ID

https://doi.org/ 10.11646/zootaxa.4560.2.5

publication LSID

lsid:zoobank.org:pub:CCAA093B-D187-4178-8762-25D12866DFF9

DOI

https://doi.org/10.5281/zenodo.5940656

persistent identifier

https://treatment.plazi.org/id/03BAB566-FF81-0E41-FF57-FF38FA1FF938

treatment provided by

Plazi

scientific name

Pasiphaea major Hayashi, 2006
status

 

Pasiphaea major Hayashi, 2006 View in CoL

( Figure 2 View FIGURE 2 )

Pasiphaea major Hayashi, 2006a: 219 View in CoL , figs. 9–11; De Grave & Fransen, 2011: 258.

Material Examined. REVIZEE, St. 0 506, 19°42.716’S, 38°36.497’W, 935m, 2 females (41.59mm; 47.84mm), MNRJ27921; St. 0 523, 19°42.569’S, 38°32.030’W, 922m, 1 female (37.21mm) and 1 male (55.20mm), MNRJ14620 View Materials GoogleMaps ; St. 0 496, 13°17.580’S, 38°17.599’W, 1717m, 1 male (71.25mm), MNRJ14613 View Materials GoogleMaps ; St. 0 524, 19°43.663’S, 38°39.838’W, 925m, 1 female (28.32mm), MNRJ27922 View Materials GoogleMaps ; St. 0 552, 21°07.493’S, 39°46.423’W, 1694m, 2 males (59.61mm– 69.35mm), MNRJ14604 View Materials GoogleMaps ; St. 0 551, 2107.780’S, 39°49.106’W, 1642m, 1 female (63.80mm), MNRJ14603 View Materials ; St. 0 548, 21°28.611’S, 39°40.303’W, depth 1799m, 1 male (67.30mm) and 1 female (80.36mm), MNRJ14609 View Materials GoogleMaps ; St. 0 505, 14°36.606’S, 38°49.345’W, 1089m, 1 female (59.29mm), MNRJ14619 View Materials GoogleMaps ; St. 0 519, 13°19.944’S, 38°19.654’W, 1730m, 1 male (61.52mm), MNRJ14618 View Materials GoogleMaps ; St. 0 550, 21°26.324’S, 39°49.113’W, 1598m, 1 male (57.20mm), MNRJ14612 View Materials GoogleMaps ; St. 0 526, 19°42.716’S, 38°36.497’W, 935m, 1 male (57.61mm), MNRJ27923 View Materials GoogleMaps ; St. 0 544, 21°24.306’S, 40°02.916’W, 1159m, 1 male (50.96mm) and 1 female (69.79mm), MNRJ14610 View Materials GoogleMaps ; St. 0 536, 20°24.008’S, 39°46.217’W, 1293m, 1 male (55.53mm) and 1 female (80.22mm), MNRJ14615 View Materials GoogleMaps ; St. 0 504, 19°42.734’S, 38°36.472’W, 910m, 1 female (32.01mm) and 1 male (61.22mm), MNRJ13692 View Materials GoogleMaps ; St. 0 502, 19°37’488’S, 38°41’909’W, 665–706m, 2 females (24.58mm– 28.05mm), MNRJ27925 View Materials ; St. 0 528, 19°45.258’S, 39°03.003’W, 1237m, 1 male (37.06mm), MNR 14606; St. 0 535, 19°58.936’S, 39°38.657’W, 1002m, 1 male (21.16mm) and 1 female (53.59mm), MNRJ14621 View Materials GoogleMaps . HABITATS, St. 8, 21°07’21.775”S, 39°38’21.365”W, 1890m, not sexed (20.80mm), MNRJ27924 View Materials GoogleMaps ; St. 13, 21°40’40.489’’S, 39°57’57.119’’W, 989.5m, 1 female (34.04mm), MNRJ27926 View Materials GoogleMaps ; St. 62; 23°9’51.124”S, 40°50’21.622’’W, 1244.4m, 1 female (19.55mm), MNRJ27927 View Materials GoogleMaps .

Diagnosis. Body robust. Rostrum with basal slit, apex not reaching or sometimes overreaching anterodorsal margin of carapace ( Fig. 2A, B View FIGURE 2 ). Carapace sharply carinate, sometimes with shallow depression near each side of rostral base ( Fig. 2A, B View FIGURE 2 ). Branchiostegal sinus large and deep; branchiostegal spine marginal or submarginal ( Fig. 2A View FIGURE 2 ). First pereopod with 2–10 spines on merus, unarmed on ischium and basis, posterodistal angle of basis bluntly produced, not dentiform ( Fig. 2C View FIGURE 2 ). Second pereopod with 10–20 spines on merus, 0–1 spine on ischium and 0–8 spines on basis and one acute posterodistal tooth ( Fig. 2D View FIGURE 2 ). First abdominal somite with dorsal carina on distal half, second to fifth somites sharply carinate along entire length; sixth abdominal somite strongly compressed and slightly shorter than fifth, with dorsal margin sharply carinate in proximal 3/4 and distally flattened ( Fig. 2E, F View FIGURE 2 ). Telson grooved in dorsal midline, posterior margin deeply forked with 8–11 pairs of spines ( Fig. 2G, H View FIGURE 2 ); telson as long as sixth abdominal somite. Pleurobranch on the eighth thoracic somite (modified from Hayashi, 2006a).

Distribution. Type locality: Indo-Pacific Ocean, Norfolk Ridge (2316’S, 16749’E). Lord Howe Ridge, New Caledonia, Wallis & Futuna, Marquesas Islands, Tonga Island and Madagascar. New records: Atlantic Ocean, Brazil (Rio de Janeiro, Espírito Santo, Bahia). Depth: 226–1890m.

Remarks. The material herein examined agrees with the description of Hayashi (2006a) in almost all diagnostic characters, except: second pereopod with 0–8 spines on basis ( Fig. 2D View FIGURE 2 ) vs. 0–4 observed by Hayashi (2006a) and telson with 8 pairs of spines in most of the specimens herein examined ( Fig. 2H View FIGURE 2 ) vs. 11 pairs observed by Haysahi (2006a).

Pasiphaea major View in CoL belongs to the P. alcocki View in CoL species group and is closely related to Pasiphaea barnardi Yaldwyn, 1971 View in CoL . Both species present the basis of the second pereopod with less than 8 spines. They present the following differences: telson as long as the sixth abdominal somite in P. major View in CoL ( Fig. 2F, G View FIGURE 2 ) vs. slightly shorter in P. barnardi View in CoL ; first pereopod with 2–10 spines on merus ( Fig. 2C View FIGURE 2 ) vs. 0–6 spines; and second pereopod with 10–20 spines on merus and 0–1 spine on ischium ( Fig. 2D View FIGURE 2 ) vs. 7–21 spines on merus and 0–2 spine on ischium ( Hayashi, 2006a).

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Decapoda

Family

Pasiphaeidae

Genus

Pasiphaea

Loc

Pasiphaea major Hayashi, 2006

Rodrigues, Thaiana G. A. & Cardoso, Irene A. 2019
2019
Loc

Pasiphaea major

De Grave, S. & Fransen, C. H. J. M. 2011: 258
Hayashi, K. I. 2006: 219
2006
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