Research Article |
Corresponding author: Harutaka Hata ( k2795502@kadai.jp ) Academic editor: Nina Bogutskaya
© 2019 Harutaka Hata, Hiroyuki Motomura.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Hata H, Motomura H (2019) A new species of sardine, Sardinella pacifica from the Philippines (Teleostei, Clupeiformes, Clupeidae). ZooKeys 829: 75-83. https://doi.org/10.3897/zookeys.829.30688
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A new sardine, Sardinella pacifica sp. n., is described on the basis of 21 specimens collected from the Philippines. The new species closely resembles Sardinella fimbriata (Valenciennes, 1847), both species having lateral scales with centrally discontinuous striae, a dark spot on the dorsal-fin origin, more than 70 lower gill rakers on the first gill arch, the pelvic fin with eight rays, and 17 or 18 prepelvic and 12 or 13 postpelvic scutes. However, the new species is distinguished from the latter by lower counts of lateral scales, pseudobranchial filaments, and postpelvic scutes (38–41, 14–19 and 12–13, respectively vs. 44–46, 19–22 and 13–14), and a shorter lower jaw (10.4–11.6% of standard length vs. 11.1–12.2%). Sardinella pacifica sp. n. is known only from the Philippines, whereas S. fimbriata is restricted to the Indian Ocean, although previously considered to be an Indo-West Pacific species, distributed from India to the Philippines.
morphology, Sardinella fimbriata, Southeast Asia, taxonomy
Sardinella Valenciennes, 1847, an Indo-Pacific and Atlantic genus of marine, brackish and/or fresh water sardines (Clupeidae), comprises 22 valid species (
During a revisionary study of Sardinella, 21 specimens of a clupeid fish from the Philippines were found to be characterized by a unique combination of scales with centrally discontinuous striae, a dark spot on the dorsal-fin origin, and low counts of lateral scales in the longitudinal series and pseudobranchial filaments. They are described herein as a new species of Sardinella.
Counts and proportional measurements followed
Sardinella fimbriata:
BMNH 1985.4.12.1, 105.1 mm SL, Manila Harbor, Manila Bay, Luzon Island, Philippines.
20 specimens, 90.2–105.9 mm SL, all from the Philippines. BMNH 1960.4.7.52, 90.2 mm SL, Palawan Island; BMNH 1985.4.12.2, 98.7 mm SL, Manila Harbor, Manila Bay, Luzon Island; CAS 38365, 105.9 mm SL, Manila Bay, Luzon Island; CAS 51909, 96.5 mm SL, Manila Bay, Luzon Island; CAS 52501, 98.4 mm SL, Manila Bay, Luzon Island; CAS 59712, 100.3 mm SL, Bacon, Sorsogon, Luzon Island; CAS-SU 28568, 96.5 mm SL, Alabat Island; CAS-SU 28569, 101.3 mm SL, Manila Bay, Luzon Island; CAS-SU 29920, 2 specimens, 97.6–103.3 mm SL, Manilla Bay, Luzon Island; CAS-SU 32915, 2 specimens, 95.7–97.8 mm SL, Manila Bay, Luzon Island; KAUM–I. 125000, 95.9 mm SL, Manila Bay, Luzon Island; USNM 56232, 94.5 mm SL, USNM 56233, 92.2 mm SL, Bacon, Sorsogon, Luzon Island; USNM 72197, 92.9 mm SL, Manila, Luzon Island; USNM 177667, 2 specimens, 93.4–96.7 mm SL; USNM 403460, 95.9 mm SL, Navatos, Manila, Luzon Island; USNM 427789, 94.9 mm SL, Catbalogan, Samar Island, Visayas.
A species of Sardinella with the following combination of characters: caudal fin with black posterior margin; lateral body scales with centrally discontinuous vertical striae, and few perforations and pores posteriorly; 38–41 (modally 38) lateral scales in longitudinal series; body scales deciduous; black spot on dorsal-fin origin; pelvic fin with one unbranched and seven branched rays; gill rakers 40–53 (43) in upper series on 1st gill arch, 71–84 (72) in lower series, 112–137 (118) in total; gill rakers 40–56 (42) in upper series on 2nd gill arch, 70–94 (79) in lower series, 112–148 (115) in total; gill rakers 37–52 (42) in upper series on 3rd gill arch, 57–75 (60) in lower series, 95–127 (99) in total; gill rakers 31–43 (35) in upper series on 4th gill arch, 44–63 (48) in lower, 78–106 (80) in total; gill rakers 30–43 (34) on hind face of 3rd gill arch; 17 or 18 (18) + 12 or 13 (13) = 29–31 (30) scutes on ventral edge of body; anal fin with 18–21 (20) rays; lower jaw rather short, 10.4–11.6% of SL.
Counts and measurements, expressed as percentages of SL, are given in Table
Counts and measurements of specimens of Sardinella pacifica sp. n. and S. fimbriata.
Sardinella pacifica sp. n. | Sardinella fimbriata | |||||
Holotype | Paratypes | Modes | Lectotype | Non-types | Modes | |
Manilla Bay, Philippines | Philippines | Malabar, India | Indian Ocean | |||
BMNH 1985.4.12.1 | n = 20 | MNHN 3227 | n = 16 | |||
Standard length (SL; mm) | 105.1 | 90.2–105.9 | 118.2 | 89.7–123.6 | ||
Counts | ||||||
Dorsal-fin rays (unbranched) | 4 | 4–5 | 4 | 4 | 4 | 4 |
Dorsal-fin rays (branched) | 15 | 14–16 | 14 | 15 | 14–16 | 15 |
Anal-fin rays (unbranched) | 3 | 3 | 3 | 3 | 3 | 3 |
Anal-fin rays (branched) | 17 | 15–18 | 17 | 16 | 15–19 | 17 |
Pectoral-fin rays (unbranched) | 1 | 1 | 1 | 1 | 1 | 1 |
Pectoral-fin rays (branched) | 13 | 12–15 | 14 | 14 | 13–16 | 14 |
Pelvic-fin rays (unbranched) | 1 | 1 | 1 | 1 | 1 | 1 |
Pelvic-fin rays (branched) | 7 | 7 | 7 | 7 | 7 | 7 |
Caudal-fin rays (upper+ lower) | 10 + 9 | 10 + 9 | 10 + 9 | 10 + 9 | 10 + 9 | 10 + 9 |
Gill rakers on 1st gill arch (upper) | 44 | 40–53 | 43 | 49 | 40–49 | 49 |
Gill rakers on 1st gill arch (lower) | 72 | 71–84 | 72 | 74 | 71–79 | 78 |
Gill rakers on 1st gill arch (total) | 116 | 112–137 | 118 | 123 | 112–127 | 121 |
Gill rakers on 2nd gill arch (upper) | 44 | 40–56 | 42 | 47 | 40–53 | 48 |
Gill rakers on 2nd gill arch (lower) | 79 | 70–94 | 79 | 87 | 75–95 | 87 |
Gill rakers on 2nd gill arch (total) | 123 | 112–148 | 115 | 134 | 115–146 | 123 |
Gill rakers on 3rd gill arch (upper) | 43 | 37–52 | 42 | 49 | 37–50 | 45 |
Gill rakers on 3rd gill arch (lower) | 61 | 57–75 | 60 | 69 | 60–82 | 75 |
Gill rakers on 3rd gill arch (total) | 104 | 95–127 | 99 | 118 | 100–131 | 122 |
Gill rakers on 4th gill arch (upper) | 35 | 31–43 | 35 | 39 | 30–40 | 36 |
Gill rakers on 4th gill arch (lower) | 49 | 44–63 | 48 | 51 | 43–53 | 48 |
Gill rakers on 4th gill arch (total) | 84 | 78–106 | 80 | 90 | 74–93 | 90 |
Gill rakers on posterior face of 3rd gill arch | 32 | 30–43 | 34 | 36 | 31–39 | 36 |
Prepelvic scutes | 18 | 17–18 | 18 | 18 | 17–18 | 18 |
Postpelvic scutes | 12 | 12–13 | 13 | 14 | 13–14 | 14 |
Total scutes | 30 | 29–31 | 30 | 32 | 31–32 | 32 |
Lateral scales in longitudinal series | 41 | 38–41 | 38 | 45 | 44–46 | 45 |
Pseudobranchial filaments | 18 | 14–19 | 18 | 21 | 19–22 | 21 |
Measurements (%SL) | Means | Means | ||||
Head Length | 24.9 | 23.1–26.8 | 25.3 | 26.5 | 25.0–28.5 | 26.5 |
Body depth | 31.5 | 28.3–36.9 | 31.3 | 33.1 | 28.8–32.3 | 31.0 |
Pre-dorsal-fin length | 42.3 | 41.9–46.1 | 44.3 | 44.9 | 43.9–46.7 | 45.2 |
Snout tip to pectoral-fin insertion | 25.1 | 24.2–27.9 | 26.3 | 27.9 | 25.2–27.9 | 26.8 |
Snout tip to pelvic-fin insertion | 51.4 | 48.3–55.1 | 51.7 | 53.4 | 50.5–53.1 | 51.7 |
Pre-anal-fin length | 76.4 | 72.9–79.3 | 77.3 | 77.9 | 75.2–77.7 | 76.7 |
Dorsal-fin base length | 16.1 | 13.9–16.5 | 15.2 | 13.4 | 13.4–16.6 | 14.9 |
Anal-fin base length | 15.7 | 13.9–17.6 | 16.0 | 16.0 | 13.7–17.5 | 16.1 |
Caudal-peduncle length | 9.5 | 7.7–10.4 | 9.0 | 9.1 | 8.1–10.2 | 9.4 |
Caudal-peduncle depth | 9.5 | 9.1–11.1 | 10.0 | 10.5 | 9.5–10.0 | 9.8 |
Dorsal-fin origin to pectoral-fin insertion | 31.8 | 28.4–34.2 | 32.1 | 33.9 | 30.6–34.1 | 32.1 |
Dorsal-fin origin to pelvic-fin insertion | 30.5 | 27.4–35.9 | 30.5 | 32.3 | 28.0–31.4 | 30.1 |
Dorsal-fin origin to anal-fin origin | 42.1 | 39.9–45.0 | 43.0 | 43.0 | 39.5–43.5 | 41.4 |
Pectoral-fin insertion to pelvic-fin insertion | 27.9 | 23.5–9.5 | 26.7 | 27.0 | 25.0–27.4 | 25.9 |
Pelvic-fin insertion to anal-fin origin | 30.5 | 26.1–31.8 | 28.8 | 27.7 | 26.1–29.7 | 27.4 |
Pectoral-fin length | broken | 18.2–20.8 | 19.6 | 18.8 | 17.4–19.7 | 18.7 |
Pelvic-fin length | 10.7 | 10.3–11.9 | 11.2 | 11.0 | 9.5–11.6 | 10.9 |
Interorbital width | 4.2 | 4.0–5.0 | 4.5 | 4.6 | 3.8–5.0 | 4.5 |
Postorbital length | 12.4 | 10.4–13.7 | 12.0 | 12.6 | 11.2–13.9 | 12.8 |
Upper-jaw length | 9.6 | 9.3–10.9 | 10.0 | 10.7 | 9.5–11.0 | 10.4 |
Mandible length | 10.7 | 10.4–11.6 | 11.0 | 11.6 | 11.1–12.2 | 11.5 |
1st unbranched dorsal-fin ray length | 1.5 | 1.1–3.0 | 1.8 | 0.9 | 1.4–3.5 | 2.1 |
Sardinella pacifica sp. n. | Sardinella fimbriata | |||||
Holotype | Paratypes | Means | Lectotype | Non-types | Means | |
Manilla Bay, Philippines | Philippines | Malabar, India | Indian Ocean | |||
BMNH 1985.4.12.1 | n = 20 | MNHN 3227 | n = 16 | |||
2nd unbranched dorsal-fin ray length | 7.2 | 2.5–9.0 | 5.2 | 2.7 | 3.5–7.5 | 5.1 |
3rd unbranched dorsal-fin ray length | 11.8 | 6.2–13.7 | 9.5 | 7.6 | 7.4–12.5 | 9.4 |
1st unbranched anal-fin ray length | 1.0 | 0.8–1.9 | 1.3 | broken | 0.6–1.8 | 1.3 |
2nd unbranched anal-fin ray length | broken | 2.3–5.3 | 3.6 | broken | 1.9–3.9 | 2.8 |
3rd unbranched anal-fin ray length | broken | 4.9–6.1 | 5.6 | 5.7 | 4.6–6.5 | 5.5 |
1st pectoral-fin ray length | broken | 16.9–19.9 | 18.5 | broken | 16.5–19.4 | 18.0 |
1st pelvic-fin ray length | 10.6 | 10.3–11.9 | 11.1 | 11.0 | 10.4–11.6 | 10.9 |
Body dark brown dorsally, elsewhere yellowish silver. Black spot on dorsal-fin origin. Melanophores scattered on upper part of dorsal fin and first pectoral-fin ray. Posterior margin of caudal fin dark. Fresh coloration shown in
Currently known only from the Philippines.
The specific name pacifica (in reference to the Pacific Ocean) is given to distinguish the species from S. fimbriata, with which it had been confused, and which is now considered to be restricted to the Indian Ocean.
The new species is assignable to the genus Sardinella, defined by
Sardinella fimbriata (Valenciennes, 1847) (17 specimens, 89.7–123.6 mm SL): BMNH 1889.2.1.1778, 112.0 mm SL, Madras, India; BMNH 1889.2.1.1915–1916, 1 of 2 specimens, 97.9 mm SL, Orissa, India; BMNH 1889.2.1.1917, 99.5 mm SL, Akyab, Burma; CAS 41433, 2 specimens, 89.7–93.9 mm SL, Calicut, India; CAS 41434, 2 specimens, 94.2–97.2 mm SL, Ernakulam, Cochin, India; CAS 41435, 119.3 mm SL, Madras, India; MNHN 3227, lectotype of Spratella fimbriata, 118.2 mm SL, Malabar, India; USNM 276446, 121.8 mm SL, Cochin, Kerala, India; USNM 276447, 105.6 mm SL, Kovalam, Trivandrum, India; USNM 276449, 2 specimens, 108.7–114.6 mm SL, Vizhinam, Trivandrum, Kerala, India; USNM 276450, 4 specimens, 111.4–123.6 mm SL, Calicut, Kerala, India.
We thank O Crimmen and J Maclaine (BMNH), D Catania (CAS), R Causse and P Pruvost (MNHN), and J Williams, K Murphy, S Raredon and D Pitassy (USNM), for opportunities to examine specimens of Sardinella. We also thank Y Haraguchi and other volunteers, and students of KAUM for their curatorial assistance, and G Hardy (Ngunguru, New Zealand) for reading the manuscript and providing help with English. This study was supported in part by a Grant-in-Aid from the Japan Society for the Promotion of Science for JSPS Fellows (DC2: 29-6652); the Sasakawa Scientific Research Grant from the Japan Science Society (28–745); JSPS KAKENHI Grant Numbers JP19770067, JP26241027, JP24370041, JP23580259, and JP26450265; the “Biological Properties of Biodiversity Hotspots in Japan” project of the National Museum of Nature and Science, Tsukuba, Japan; “Establishment of Research and Education Network on Biodiversity and Its Conservation in the Satsunan Islands” project of Kagoshima University adopted by the Ministry of Education, Culture, Sports, Science and Technology, Japan; and the “Island Research” project by Kagoshima University.