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In actinopterygians, the pelvic fin consists of two endochondrally-derived bony girdles attached to bony radials. Dermal fin rays (lepidotrichia) are positioned distally from the radials. There are three pairs of muscles each on the dorsal and ventral side of the pelvic fin girdle that abduct and adduct the fin from the body. [citation needed]
Polynemus multifilis is a medium-sized species of threadfin which attains a maximum standard length of 28 centimetres (11 in). [2] It has a pointed snout and the dorsal profile of the head is almost straight, There are two separate dorsal fins, the first dorsal fin contains 8 spines which are all of a similar thickness at their bases and the second dorsal fin has a single spine and 14-16 soft ...
The pectoral filaments are white. The pelvic fins are white with a yellow front edge, while the caudal fin is blackish with a yellowish base. This species can attain a maximum total length of 2 metres (6.6 ft), although 50 centimetres (20 in) is a more normal size.
The first dorsal fin is black; the second dorsal fin is greyish with the last ray being white. The base of the pectoral fin is greyish black, darkening to black towards the rear. The pectoral filaments are greyish-black with white tips and bases. The front part of the pelvic fin is greyish black with the rest of it being coloured white.
From January to October, America’s Poison Centers received more than 7,250 calls about potential mushroom poisonings, an 11% increase from all of 2022, when there were about 6,500 calls for the ...
Psathyrella is a large genus of about 400 species, [1] and is similar to the genera Coprinellus, Coprinopsis, Coprinus and Panaeolus, usually with a thin cap and white or yellowish white hollow stem. The caps do not self digest as do those of Coprinellus and Coprinopsis. Some also have brown spores rather than black. These fungi are often drab ...
A small fin, positioned behind the dorsal or anal fins, that is supported by a ray or rays. fluviatile Living in rivers. free rear tips (of fins) The posterior tip of the fin that is closest to the most posterior point of the fin base. frontal ridge A ridge running along the top of the head along the midline. furcate Forked. fusiform
The first dorsal fin has three spines, the second dorsal fin has between 25 and 28 rays (mode: 27), the anal fin has between 23 and 25 rays (mode: 24), the pectoral fins have either fifteen or sixteen rays each (mode: 15), and the caudal fin has twelve rays. The pelvic fin in this species is rudimentary and has been reduced to a single rayless ...