Johnius weberi Hardenberg 1936

Johnius weberi Hardenberg, 1936 (Common name: Weber croaker) (Fig. 14, Table 7) Johnius weberi Hardenberg, 1936: 251 (type locality: Telok Pekadai, Kapaus River, Borneo; mouth of Pekadai; mouth of Peniti River; Pedang Tukar Bay). Syntypes: (6) ZMA 113119 (2), 113120 (2). Johnius weberi Hardenberg, 1936: Sasaki, 2000: 621; Sasaki, 2001: 3153; Mohamad Faisal, 2009: 98; Atan et al., 2010: 196. Material examined. Non-types: NMMB-P37097 (3, 115.97 to 126.43 mm SL), Beluran, Sabah, Malaysia, 28 February 2017; NMMB-P37098 (5, 117.55 to 122.51 mm SL), Kuala Pahang, Pahang, Malaysia, 2 April 2017; NMMB-P37099 (2, 134.33 to 129.36 mm SL), Tawau, Sabah, Malaysia, 23 May 2017; NMMB-P23652 (2, 104.33 to 118.12 mm SL), Kuala Kedah, Kedah, Malaysia, 3 June 2014; NMMB-P21716 (A) (30, 62.25 to 112.97 mm SL), Matang, Perak, Malaysia, 21 April 2011. Diagnosis. A species of Johnius with the following combination of characters: medium species with elongate body, body depth 21 to 24% of standard length; snout swollen, projecting well in front of upper jaw; mouth small, inferior; moderately small eye, 20 to 25% of HL; gill rakers short, stiff, about 1/3 to 1/2 length of gill filaments at angle of arch, 7 to 9 on lower limb of first gill arch; second anal spine length moderately long, slender, about 22 to 31% of HL; and scales moderately small, 7 to 10 scale rows above lateral line. Distribution. Eastern Indian Ocean, western Pacific: Indonesia east to Papua New Guinea, north to Vietnam and Hong Kong (China). Remarks. Johnius weberi can be differentiated from the rest of other Johnius species in the East Malaysian waters by the obvious swollen snout, yellowish to silvery body color, with long elongate body and also with the long and slender second anal spine length. Johnius weberi is rare and was endemic species mainly can be collected at mangrove mouth river with highly freshwater recharge stretching from the Sabah states. It was only collected at the Beluran collection sites in our sampling survey.

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Publication Details

Journal
Zenodo (CERN European Organization for Nuclear Research)
Published
2024-12-10
DOI
https://doi.org/10.5281/zenodo.14389603
Primary Topic
Ichthyology and Marine Biology
Type
article
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article

Johnius weberi Hardenberg 1936

Zenodo (CERN European Organization for Nuclear Research)
Ichthyology and Marine Biology
article

Johnius weberi Hardenberg 1936

article en

Abstract

Johnius weberi Hardenberg, 1936 (Common name: Weber croaker) (Fig. 14, Table 7) Johnius weberi Hardenberg, 1936: 251 (type locality: Telok Pekadai, Kapaus River, Borneo; mouth of Pekadai; mouth of Peniti River; Pedang Tukar Bay). Syntypes: (6) ZMA 113119 (2), 113120 (2). Johnius weberi Hardenberg, 1936: Sasaki, 2000: 621; Sasaki, 2001: 3153; Mohamad Faisal, 2009: 98; Atan et al., 2010: 196. Material examined. Non-types: NMMB-P37097 (3, 115.97 to 126.43 mm SL), Beluran, Sabah, Malaysia, 28 February 2017; NMMB-P37098 (5, 117.55 to 122.51 mm SL), Kuala Pahang, Pahang, Malaysia, 2 April 2017; NMMB-P37099 (2, 134.33 to 129.36 mm SL), Tawau, Sabah, Malaysia, 23 May 2017; NMMB-P23652 (2, 104.33 to 118.12 mm SL), Kuala Kedah, Kedah, Malaysia, 3 June 2014; NMMB-P21716 (A) (30, 62.25 to 112.97 mm SL), Matang, Perak, Malaysia, 21 April 2011. Diagnosis. A species of Johnius with the following combination of characters: medium species with elongate body, body depth 21 to 24% of standard length; snout swollen, projecting well in front of upper jaw; mouth small, inferior; moderately small eye, 20 to 25% of HL; gill rakers short, stiff, about 1/3 to 1/2 length of gill filaments at angle of arch, 7 to 9 on lower limb of first gill arch; second anal spine length moderately long, slender, about 22 to 31% of HL; and scales moderately small, 7 to 10 scale rows above lateral line. Distribution. Eastern Indian Ocean, western Pacific: Indonesia east to Papua New Guinea, north to Vietnam and Hong Kong (China). Remarks. Johnius weberi can be differentiated from the rest of other Johnius species in the East Malaysian waters by the obvious swollen snout, yellowish to silvery body color, with long elongate body and also with the long and slender second anal spine length. Johnius weberi is rare and was endemic species mainly can be collected at mangrove mouth river with highly freshwater recharge stretching from the Sabah states. It was only collected at the Beluran collection sites in our sampling survey.

Zenodo (CERN European Organization for Nuclear Research)
Universiti Malaysia Terengganu (MY), National Museum of Marine Biology and Aquarium (TW)
Life below water
Openalex Percentile: Top 46%
Ichthyology and Marine Biology
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