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. 2019 Mar 11;829:75–83. doi: 10.3897/zookeys.829.30688

A new species of sardine, Sardinellapacifica from the Philippines (Teleostei, Clupeiformes, Clupeidae)

Harutaka Hata 1,✉, Hiroyuki Motomura 2
PMCID: PMC6422981  PMID: 30914837

Abstract Abstract

A new sardine, Sardinellapacificasp. n., is described on the basis of 21 specimens collected from the Philippines. The new species closely resembles Sardinellafimbriata (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%). Sardinellapacificasp. 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.

Keywords: morphology, Sardinella fimbriata , Southeast Asia, taxonomy

Introduction

Sardinella Valenciennes, 1847, an Indo-Pacific and Atlantic genus of marine, brackish and/or fresh water sardines (Clupeidae), comprises 22 valid species (Whitehead 1985, Stern et al. 2016). Many species, including the endemic fresh water species Sardinellatawilis (Herre, 1927), occur in the Philippines (Fowler 1941, Rau and Rau 1980, Whitehead 1985, Conlu 1986, Munroe et al. 1999, Willette et al. 2011a, b, Willette and Santos 2012, Stern et al. 2016, Hata 2017a, b), some being an important fisheries resource (locally named “tambam”, “tuloy”, and “tunsoy”) (Rau and Rau 1980, Conlu 1986). A recently described species, Sardinellagoni Stern, Rinkevich & Goren, 2016 was based on specimens collected from Boracay Island, the Philippines.

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.

Materials and methods

Counts and proportional measurements followed Hubbs and Lagler (1947) with additions as in Kimura et al. (2009). All measurements were made with digital calipers to the nearest 0.01 mm. Standard length is abbreviated as SL. Institutional codes follow Sabaj (2016).

Sardinella pacifica sp. n.

http://zoobank.org/30675329-0FBF-45F3-ACF5-30D6C6669C39

Figures 1 , 2 , Table 1

Figure 1.

Figure 1.

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Holotype of Sardinellapacifica sp. n., BMNH 1985.4.12.1, 105.1 mm SL, Manila Bay, Luzon Island, Philippines.

Figure 2.

Figure 2.

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Photograph of a stained scale, collected from mid-body below the dorsal fin, of Sardinellapacifica sp. n. (BMNH 1985.4.12.1, 105.1 mm SL, Manila Bay, Luzon Island, Philippines).

Table 1.

Counts and measurements of specimens of Sardinellapacifica sp. n. and S.fimbriata.

Sardinellapacifica 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
Sardinellapacifica 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
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  • Sardinella fimbriata : Fowler 1941: 609 (Bacon, Manilla and Aparri, Philippines); Chan 1965 (in part): 14 (Philippines); Rau and Rau 1980: 203 (Philippines); Whitehead 1985 (in part): 98, unnumbered fig. (Philippines); Conlu 1986: 45, fig. 20 (Alabat Island; Appari, Cagayan; Bacon, Sorsogon; Bauang, La Union; Calapan, Mindoro; Cavite, Cavite; Davao Gulf; Estancia, Iloilo; Malolos, Bulacan; Manila Bay; Margosatubig, Zamboanga; Nasugbu, Batangas; Ragay Gulf, Quezon; San Miguel Bay, Camarines Sur; Samar, Philippines); Munroe et al. 1999 (in part): 1814, unnumbered fig. (Philippines); Luceño et al. 2013: 30, fig.2 (Butuan, Dipolog, and Pagadian, Mindanao Island, Philippines); Stern et al. 2016 (in part): 9, fig. 2 (b), fig. 4 (b) (Manilla, Philippines). (non Valenciennes)

Holotype.

BMNH 1985.4.12.1, 105.1 mm SL, Manila Harbor, Manila Bay, Luzon Island, Philippines.

Paratypes.

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.

Diagnosis.

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.

Description.

Counts and measurements, expressed as percentages of SL, are given in Table 1. Data for the holotype are presented first, followed by paratype data in parentheses. Body oblong, compressed, deepest at dorsal-fin origin. Dorsal profile of body elevated from snout tip to dorsal-fin origin, thereafter decreasing to uppermost point of caudal-fin base. Ventral profile of body curved downward from lower-jaw tip to pelvic-fin insertion, thereafter rounded to ventralmost point of caudal-fin base. Abdomen from isthmus to anus with 30 (29–31) scutes. Predorsal scutes absent. Anteriormost point of pectoral-fin insertion anterior to posteriormost point of opercle. Upper, posterior and ventral margins of pectoral fin nearly linear. Posterior tip of pectoral fin pointed. Pectoral-fin axillary scale present. Posteriormost dorsal-fin ray not filamentous. Anteriormost point of pelvic-fin insertion located directly below origin of 8th (7th–10th) dorsal-fin ray. Posterior tip of depressed pelvic fin reaching between a vertical through posterior end of dorsal-fin base and anus. Pelvic-fin axillary scale present. Anal-fin origin posterior to vertical through posteriormost point of dorsal-fin base. Two posteriormost anal-fin rays enlarged. Caudal fin forked. Posterior tips of caudal-fin lobes pointed. Anus on ventral midline, slightly anterior to anal-fin origin, posterior to midpoint of body. Scales cycloid, thin, deciduous, except for robust ventral scutes. Scales on lateral body surface with several centrally discontinuous vertical striae, few perforations and pores posteriorly (Fig. 2). Bases of dorsal and anal fins with low scaly sheaths. Predorsal scales paired. No elongate, wing-like scales present beneath normal paired scales. No scales on head and fins, except for a broad triangular sheath of scales on caudal fin. Mouth terminal, small, posterior tip of maxilla not reaching vertical through anterior margin of iris. Premaxilla and hypomaxilla without teeth. Ventral margin of maxilla toothed. Lower jaw with several conical teeth anteriorly. Posterior ramus of lower jaw elevated. Second supramaxilla symmetrical. Orbit elliptical, eye and iris round. Eyes covered with adipose eyelid posteriorly. Interorbital space flat. Nostrils close to each other, anterior to orbit. Eight (8–10) on top of head. No lateral line. Gill rakers long, slender, with small asperities on anterior surface. Pseudobranchial filaments present. Gill opening with two fleshy outgrowths on posterior margin and a large papilla on ventral margin. Posterior margins of preopercle and opercle smooth.

Color of preserved specimens.

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 Luceño et al. (2013) (as S.fimbriata).

Distribution.

Currently known only from the Philippines.

Etymology.

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.

Remarks.

The new species is assignable to the genus Sardinella, defined by Whitehead (1985) and Munroe et al. (1999), due to its compressed body, abdomen covered with prominently keeled scutes, paired predorsal scales, a symmetrical second supramaxilla, toothless hypo-maxilla, two posteriormost anal-fin rays enlarged, the dorsal fin without filamentous rays, and two fleshy outgrowths on the hind margin of the gill opening. It most closely resembles Sardinellafimbriata (Valenciennes, 1847) (Fig. 3), sharing centrally discontinuous striae on the lateral body scales, a dark spot on the dorsal-fin origin, more than 70 lower gill rakers on the first gill arch, eight pelvic-fin rays, 15–18 branched anal-fin rays, and 17 or 18 prepelvic scutes (Whitehead 1985, Munroe et al. 1999, Stern et al. 2016). However, S.pacifica can be distinguished from the latter by lower counts of lateral scales in the longitudinal series (38–41 vs. 44–46 in S.fimbriata; Table 1), pseudobranchial filaments (14–19 vs. 19–22; Table 1; Fig. 4A) and postpelvic scutes (12 or 13 vs. 13 or 14; Table 1), and a shorter lower jaw (10.4–11.6% SL vs. 11.1–12.2%; Table 1; Fig. 4B). Moreover, the deciduous body scales of the new species are distinctively diagnostic, the body scales of S.fimbriata being non-deciduous. Although S.fimbriata has been regarded as an Indo-West Pacific species, distributed from India to the Philippines (Whitehead 1985, Munroe et al. 1999, Stern et al. 2016), no Pacific region specimens of S.fimbriata appear to have been collected (see comparative materials), and the species is judged herein to be an Indian Ocean endemic.

Figure 3.

Figure 3.

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Lectotype of Sardinellafimbriata, MNHN 3227, 118.2 mm SL, Malabar, India.

Figure 4.

Figure 4.

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Relationships of (A) pseudobranchial filament numbers, and (B) lower-jaw length (as % of standard length) to SL in Sardinellapacifica sp. n. [solid circles (solid star = holotype)] and S.fimbriata [open triangles (open star = lectotype)]

Comparative material examined.

Sardinellafimbriata (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 Spratellafimbriata, 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.

Supplementary Material

XML Treatment for Sardinella pacifica
zookeys.829.30688-treatment1.xml (45.7KB, xml)

Acknowledgements

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.

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

References

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Associated Data

This section collects any data citations, data availability statements, or supplementary materials included in this article.

Supplementary Materials

XML Treatment for Sardinella pacifica
zookeys.829.30688-treatment1.xml (45.7KB, xml)

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