Do bumblebee cichlids have teeth?

Do cichlids have teeth in their throat?

Cichlids are said to have a common feature with saltwater fish such as parrotfish and wrasses – a set of teeth in the throat that coexists with the regular teeth. The bumblebee cichlids have a spiny ray in the back of their dorsal, anal, and pectoral fins, which help fight off hunters and predators.

What are the pharyngeal bones of cichlids?

The lower pharyngeal bones of cichlids also carry specialized teeth which augment their normal mandibular teeth in the breakdown of food. Fish jaw: The primary oral jaws open and close the mouth, and a second set of pharyngeal jaws are positioned at the back of the throat.

Why do cichlids have teeth in their throat?

Its pharyngeal teeth (in the throat) afford cichlids so many “niche” feeding strategies, because the jaws pick and hold food, while the pharyngeal teeth crush the prey.

Is there a pharyngeal jaw in Lake Victoria cichlids?

^ McGee, M. D.; Borstein, S. R.; Neches, R. Y.; Buescher, H. H.; Seehausen, O.; Wainwright, P. C. (27 November 2015). “A pharyngeal jaw evolutionary innovation facilitated extinction in Lake Victoria cichlids”. Science. 350 (6264): 1077–1079.

How are the teeth arranged on the pharyngeal bones?

The teeth are arranged in a single row on each of the two pharyngeal bones. These falcate bones, representing fifth ceratobranchials, are joined at their ventral tips to each other and to ventral gill arch ele- ments by means of a cartilaginous copula. There are only muscular connections between the pharyngeal bones and the skull, vertebral

Why do fish have jaws and gills?

Over time though, skeletal rods in the pharyngeal slits evolved into the hinged jaw that we now know and love. Amazingly, some animals have both jaws and gills, which are now used for breathing instead of feeding. Collectively, these animals are known as the fishes of the world.

Do pharyngognathous fishes have pharyngeal jaws?

For nearly 50 years, the robust pharyngeal jaws of cichlids, wrasses and other pharyngognathous fishes have been considered a classic example of evolutionary innovation that opened up new niches through increased trophic flexibility.

What are some examples of pharyngeal jaws in fish?

A notable example are fish from the family Cichlidae. Cichlid pharyngeal jaws have become very specialized in prey processing and may have helped cichlid fishes become one of the most diverse families of vertebrates.

Are pharyngeal teeth a handicap when competing with other predators?

However, later studies based on Lake Victoria cichlids suggest that this trait may also become a handicap when competing with other predator species. Most fish species with pharyngeal teeth do not have extendable pharyngeal jaws. A particularly notable exception is the highly mobile pharyngeal jaw of the moray eels.

Is it possible to remove a fish bone from the hypopharynx?

This paper depicts a patient’s self-induced traumatic attempt to remove a huge serrated fish bone that was lodged at the hypopharynx which made its way to the prevertebral soft tissue space compelling an open surgical procedure with neck exploration for definite treatment. 1. Introduction

Where is the fish bone on a neck X-ray?

Fig. 1. Plain lateral neck X-ray showed fish bone at C4-C5 region as well as CT scans (axial & 3D reconstruction views) revealed fish bone traversing adjacent to the C4-C5 vertebral body.

Why are fish bones so common in South-East Asian countries?

Foreign bodies that are lodged in the upper aerodigestive tract which are most common in South-East Asian regions are fish bones, because fish are prepared and cooked as a whole with bones, compared to the western countries where fish are cooked in the form of fillets or patties.

Can a plain X-ray be used to diagnose fish bones?

Usually a plain X-ray is used to affirm the diagnosis of an ingested fish bone, but it is challenging to tell if it has migrated extraluminally. In our case, an urgent plain CT scan was done but it was difficult to determine the fish bone’s distance and orientation. Lue et al.

What is the pharyngeal bone used for?

pharyngeal bones. The teeth occlude with a chewing pad borne by the basioccipital and are well-adapted for crushing shells. Most catostomids (other Moxostoma, Cycleptus, Hypentelium, Lagochila, Catostomus, Chasmistes, Erimyzon, Xyrauchen and Minytrema) have 43-90 moder- ately compressed teeth arranged in comblike fashion on each bone.

What is the difference between upper and lower pharyngeal jaws?

The lower pharyngeal jaws are derived from the paired fifth ceratobranchial bones, whereas the upper jaws consist of dermal plates attached to the posterior epibranchial and pharyngobranchial bones. Both jaws bear teeth that vary depending on the food type of the fish (see below).

How do the muscles that move the pharyngeal jaws differ among species?

The size of the muscles that move the pharyngeal jaws differs among three species, the Clown Wrasse (Halichoeres maculipinna), Slippery Dick (H. bivittatus), and Yellow head Wrasse (H. garnoti). In all three species, muscle mass and pharyngeal gape increase with increasing body size (Fig. 8.6).

Is the evolution of cichlid egg-spots linked with a cis-regulatory change?

“The evolution of cichlid fish egg-spots is linked with a cis-regulatory change”. Nature Communications. 5: 5149. Bibcode: 2014NatCo…5.5149S. doi: 10.1038/ncomms6149.

What are the different cases and figures of fish bone?

Cases and figures Case 1: fish boneCase 1: fish bone Drag here to reorder. Case 2: fish boneCase 2: fish bone Drag here to reorder. Case 3: soft tissue gas from fish bone Case 3: soft tissue gas from fish bone

What is the sensitivity of lateral neck radiographs of fish bones?

lateral neck radiograph sensitivity of direct visualization of fish bones is low at ~35% (range 25-39%) 1-3 fish bones have variable opacity, depending on the species of fish 2 can be obscured by soft tissue swelling or fluid 2

Where are fish bone foreign bodies (FFBS) most commonly found?

Fish bone foreign bodies are more commonly found in the oropharynx in cases of patients 40 years old. Symptoms are typically non-indicative for the location of the FFB, with the exception of foreign body sensation at/superior to the cervical esophagus.