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opencc-by-4.0Mar 2024View details →

Philippine Sea plate and surrounding magmatism reveal the Antarctic-Zealandia, Pacific, and Indian mantle domain boundaries

This file includes Supplementary data 1-5 and the Supplementary movie 1 for: Shengping Qian, Jeremy Tsung-Jui Wu, Jonny Wu. Philippine Sea plate and surrounding magmatism reveal the Antarctic-Zealandia, Pacific, and Indian mantle domain boundaries. submitted in 2023

opencc-by-4.0Feb 2022View details →

ChRM and grain-size data of deep-sea sediments in the Central Philippine Sea

The Philippine Sea is a typical region of eolian dust reposition and is located within the Western Pacific Warm Pool. Here, we use the paleo-magnetic stratigraphy and the grain-size distributions of Quaternary abyssal deposits in the Central Philippine Sea to investigate the factors controlling regional sedimentary and paleoenvironmental changes. Our principal results are as follows: (1) A reliable geochronologic framework for Quaternary sediments in the Central Philippine Sea is established. (2) An eastward expansion of the regional depocenter in the Middle Pleistocene is observed. (3) The mean grain size of the abyssal sediments is 7–8 μm, and there are only minor differences between the sites. Comparison of the geochronological framework with various paleoenvironmental events during the Mid-Pleistocene Transition shows that sedimentary processes can be correlated to a major transition in global climate which affected regions from the Asian interior to the tropical Pacific, and that changes in aeolian sedimentation are likely the predominant factor responsible. A derived grain-size proxy of the sedimentary dynamics and its comparison with various paleoenvironmental proxies show that the relative contributions are roughly estimated as 23%, 9%, and 68% for aeolian inputs, oceanic circulation, and the tropical Pacific zonal SST gradient, respectively in the studied region. The relative importance of tropical processes in abyssal sedimentary dynamics highlights the possibility of the long-term influence of (sub)mesoscale eddies in the upper ocean, via regional upwelling and unique submarine topography, on the deepest part (>5000 m) of the Central Philippine Sea, from meteorological to geological timescales.

Fig. 4 in First Records of an Estuarine Goby Acentrogobius ocyurus (Gobiiformes: Gobiidae) from Japan and the Sulu Sea in the Philippines

Fig. 4. Map showing the sites where Acentrogobius ocyurus has been recorded. Solid circles represent new records described in the present study; open square represents type locality; open circles are other records in literatures (Jordan and Seale 1907; Herre 1936; Herre and Myers 1937; Fowler 1938; Koumans 1953; Blaber et al. 1990; Lim and Larson 1994; Anonymous 2003; Larson and Lim 2005; Larson et al. 2008; Zhong 2008; Tan et al. 2010; Satapoomin 2011; Ng et al. 2015; Shibukawa 2018); triangles are records in the online databases (Millen 2019; Museum and Art Gallery of the Northern Territory 2019; Western Australian Museum 2019; Australian Museum 2021; European Bioinformatics Institute 2021; Nakae and Shinohara 2021; Orrell 2021; Queensland Museum 2021; Shao 2021; Catania and Fong 2022; UMMZ Fish Division Data Group 2022).

Fig. 1 in First Records of an Estuarine Goby Acentrogobius ocyurus (Gobiiformes: Gobiidae) from Japan and the Sulu Sea in the Philippines

Fig. 1. Fresh specimens of Acentrogobius ocyurus from Manko in Okinawa-jima Island, Japan (A: OCF-P 3494, male, 27.6 mm SL; B: OCF-P 3813, 28.2 mm SL, female) and from Puerto Princesa in Palawan Island, Philippines (C: URM-P 49640, 30.4 mm SL, male).

Fig. 6 in First Records of an Estuarine Goby Acentrogobius ocyurus (Gobiiformes: Gobiidae) from Japan and the Sulu Sea in the Philippines

Fig. 6. Preserved (A–D) and fresh (E) specimens of Acentrogobius ocyurus and related species. A, holotype of Rhinogobius ocyurus (CAS-SU 9249, 30.7 mm SL); B and C, holotype or paratype of Quisquilius malayanus (CAS-SU 30963, B=29.4 mm and C=27.2 mm SL); D, holotype of Ctenogobius kranjiensis (CAS-SU 32999, 29.4 mm SL); E, Acentrogobius sp. "Suzume-haze" (URM-P 49641, 38.6 mm SL).

Fig. 3 in First Records of an Estuarine Goby Acentrogobius ocyurus (Gobiiformes: Gobiidae) from Japan and the Sulu Sea in the Philippines

Fig. 3. Living Acentrogobius ocyurus showing various color markings in aquaria. A, Different individual; B, C, same individual under different light conditions. All specimens were collected from Manko in Okinawa-jima Island, Japan (no voucher).

Fig. 5. A in First Records of an Estuarine Goby Acentrogobius ocyurus (Gobiiformes: Gobiidae) from Japan and the Sulu Sea in the Philippines

Fig. 5. A living Alpheus richardsoni (WMNH-2019-INV-401), collected together with Acentrogobius ocyurus (OCF-P 3810) from Manko in Okinawa-jima Island, Japan.

Fig. 2 in First Records of an Estuarine Goby Acentrogobius ocyurus (Gobiiformes: Gobiidae) from Japan and the Sulu Sea in the Philippines

Fig. 2. Cephalic sensory organs of Acentrogobius ocyurus (27.6 mm SL, OCF-P 3494). A, Lateral view; B, dorsal view; C, ventral view. Arrows indicate the anteroventral end of the gill opening.

Fig. 10 in New and rare species of the genus Lepidozona (Mollusca: Polyplacophora) from the South China, East China and the Philippine seas

Fig. 10. Lepidozona acostata, holotype, BL 8 mm, south Vietnam, R/V Odissey, trawl 59, 310 m, on sunken wood; A, B – dorsal scales; C–I – marginal needle, scales and spicules; J – ventral scale; K – central and lateral teeth of radula; L – head of major lateral tooth of radula. Scale bar 100 µm.

Fig. 11 in New and rare species of the genus Lepidozona (Mollusca: Polyplacophora) from the South China, East China and the Philippine seas

Fig. 11. Lepidozona excellens, holotype, BL 18.0 mm, Philippine Sea, R/V Odissey, stn 37, 380–420 m; A – valve I, dorsal view; B – valve II, dorsal view; C – valve V, dorsal view, D – valve VIII dorsal view; E – valve VIII, lateral view; F – valve VII, detail of tegmentum in jugal, central and lateral areas; G – valve VII, detail of tegmentum in, central and lateral areas; H – valve V, rostral view.

Fig. 8 in New and rare species of the genus Lepidozona (Mollusca: Polyplacophora) from the South China, East China and the Philippine seas

Fig. 8. Lepidozona acostata, holotype, BL 8 mm, south Vietnam, R/V Odissey, trawl 59, 310 m, on sunken wood; A – valve I, dorsal view; B – valve V, dorsal view, C – valve VIII, dorsal view; D – valve V, ventral view; E – valve V, detail of tegmentum in central area; F – valve VIII, lateral view; G – valve IV, rostral view.

Fig. 6 in New and rare species of the genus Lepidozona (Mollusca: Polyplacophora) from the South China, East China and the Philippine seas

Fig. 6. Lepidozona bisculpta, BL 8 mm, Vietnam, Tonkin Bay, 6–7 m, on old corals; A – dorsal scales, marginal spicules, scales and ventral scales; B – radula.

opencc-by-4.0Dec 2021View details →

Figs 5-14 in Halobates pangantihoni nov.sp. (Hemiptera, Gerridae), a new sea skater from Mindoro, Philippines

Figs 5-14: (5-11) Halobates pangantihoni nov.sp.: Foreleg of (5) male (6) and female; (7) segment 8 of male, ventral aspect, and styliform processes in lateral aspect; (8) sternum 7 of female, caudal aspect; (9-11) proctiger of male in (10) dorsal and (9, 11) lateral aspects, with pygophore. (12, 13) Proctiger of H. dianae in (12) lateral aspect, with pygophore, and (13) dorsal aspect. (14) Proctiger of H. liaoi in dorsal aspect. Pilosity mostly omitted.

FIG. 4. — Dinochelus ausubeli n. gen., n in Mighty claws: a new genus and species of lobster from the Philippine deep sea (Crustacea, Decapoda, Nephropidae)

FIG. 4. — Dinochelus ausubeli n. gen., n. sp., š holotype, pcl 26.1 mm (NMCR), abdomen slightly damaged and causing the posterior part of abdomen to bend right: A, left lateral view; B, dorsal view.

FIG. 3. — Dinochelus ausubeli n. gen., n in Mighty claws: a new genus and species of lobster from the Philippine deep sea (Crustacea, Decapoda, Nephropidae)

FIG. 3. — Dinochelus ausubeli n. gen., n. sp., š holotype, pcl 26.1 mm (NMCR): A, right pereopod 1, lateral view; B, proximal portion of right pereopod 1, dorsal view; C, distal portion of right pereopod 1 pollex, mesial oblique view; D, distal portion of right pereopod 1 pollex, dorsal view; E, left pereopod 1, lateral view; F, left pereopod 1, dorsal view; G, distal portion of left pereopod 1 pollex, dorsal view; H-K, pereopods 2-5, lateral view; L, right pleopod 1, lateral view; M, right pleopod 1, mesial view; N, right pleopod 2, anterior view; O, right pleopod 3, anterior view. Scale bar: A-K, N, O, 10.0 mm; L, M, 5.0 mm.

FIG. 1 in Mighty claws: a new genus and species of lobster from the Philippine deep sea (Crustacea, Decapoda, Nephropidae)

FIG. 1. — Maximum likelihood (ML) phylogram of "thaumastochelid" genera based on analysis of mitochondrial 12S rRNA sequences under best fitting model TVM + G. Numbers at nodes indicate bootstrap proportions for analyses under MP (upper) and ML (lower). Outgroups (not shown) were Homarus americanus, Metanephrops japonicus and Nephropsis serrata.

FIG. 2. — A-I, Dinochelus ausubeli n. gen., n in Mighty claws: a new genus and species of lobster from the Philippine deep sea (Crustacea, Decapoda, Nephropidae)

FIG. 2. — A-I, Dinochelus ausubeli n. gen., n. sp., š holotype, pcl 26.1 mm (NMCR); J, K, Thaumastochelopsis brucei Ahyong, Chu & Chan, 2007, š holotype, pcl 21.1 mm (AM P49083); A, body, right lateral view; B, J, anterior carapace, dorsal view; C, abdomen, dorsal view; D, right uropodal exopod, ventral view; E, right antenna, dorsal view; F, right antenna, ventral view; G, K, epistome, ventral view; H, right maxilliped 2, lateral view; I, right maxilliped 3, lateral view. Scale bar: A-D, G, 10.0 mm; E, F, H, I, 5.0 mm; J, K, 7.5 mm.