Nomorhamphus megarrhamphus

Kraemer, Janina, Thieme, Philipp, Hadiaty, Renny Kurnia & Herder, Fabian, 2019, Structure of the andropodium of the viviparous halfbeak genus Nomorhamphus (Atherinomorpha: Beloniformes: Zenarchopteridae), endemic to Sulawesi, Indonesia, Raffles Bulletin of Zoology 67, pp. 247-259 : 252

publication ID

https://doi.org/ 10.26107/RBZ-2019-0019

publication LSID

lsid:zoobank.org:pub:B6CB5368-DCBC-4AD5-956E-7425B9D46586

persistent identifier

https://treatment.plazi.org/id/038187E1-7E4D-827D-FCFF-F9C891D1F7FF

treatment provided by

Diego

scientific name

Nomorhamphus megarrhamphus
status

 

Nomorhamphus megarrhamphus View in CoL & N. weberi

( Fig. 5 View Fig )

Pigmentation. Lack of black pigment at posterior anal fin rays, few and small melanophores at cryptoplica and base of fin rays.

Andropodium. All males investigated are lacking a physa and the cryptoplica is weakly developed, covering only a small basal part of the andropodial fin rays. The anal-fin rays forming the andropodium appear less curved and modified compared to other species. 1 st anal pterygiophore thickened, angled anteriorly. 2 nd fin ray with 9–11 segments proximal to spinae; segments 3–5 broader than all other segments of the 2 nd fin ray. N. megarrhamphus : spiculus clearly segmented at proximal end, short and thin, dorsal portion slightly curved, in contact with distal segments of 3 rd fin ray. N. weberi : sickle-shaped spiculus, not clearly segmented, pointed ventrally, not in contact with tip of 3 rd fin ray. 3 rd fin ray with segments 2/3–6/7 composed of three longitudinal rows, each row approximately 1/3 the height of the respective segment. 4 th fin ray approximately as broad as 2 nd fin ray. N. weberi : segments 3–5 composed of three longitudinal rows, each row approximately 1/3 the height of the respective segment. 5 th fin ray thin, not noticeably thickened.

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