Top Results for Echinothurioid
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Phormosoma placenta is a species of deep-sea sea urchin belonging to the order Echinothurioida, first described by Charles Wyville Thomson in 1872. It is primarily found in the Atlantic Ocean, typically inhabiting benthic environments at depths of 500 meters or more. Like other echinothurioids, it p...
Why this score
Classic deep-sea echinothurioid, historically known and morphologically distinctive; good specialist reputation.
Scoring methodology
Calveriosoma hystrix is a marine sea urchin in the family Echinothuriidae, a group whose members have flexible tests and conspicuous spines. Thomson described the species in 1872. It is distinguished by a narrow digestive siphon that runs alongside the stomach, a structure thought to help move water...
Why this score
Deep-sea echinothurioid with striking spination and specialist appeal, though limited public familiarity.
Scoring methodology
Phormosoma bursarium is a deep-water echinothurioid sea urchin described by Alexander Agassiz in 1881. It has been recorded from approximately 170 to 2,340 metres, placing it across a substantial range of marine depths. The species belongs to a group commonly associated with flexible, leather-like s...
Why this score
Recognized Phormosoma species, valued in deep-sea taxonomy but less prominent than P. placenta.
Scoring methodology
Echinothuria floris is a fossil echinothuriid sea urchin described by Woodward in 1863, serving as the type species of Echinothuria.
Why this score
Deep-sea leather urchin with unusual morphology and specialist interest, but low popular familiarity.
Scoring methodology
Echinothuria diomedeae is not readily verifiable as an accepted current name; diomedeae is used for Caenopedina diomedeae, named in 1939.
Why this score
Echinothuriid deep-sea species with taxonomic value, limited aggregate recognition beyond specialists.
Scoring methodology
Sperosoma antillense is a deep-sea regular sea urchin in the family Echinothuriidae. Scientific references place the species in the western Atlantic, including waters off Barbados in the Caribbean, and record it from bathyal depths; one taxonomic account gives an example locality at about 700 metres...
Why this score
Deep-sea echinothuriid with Atlantic specialist interest, but low public and applied recognition.
Scoring methodology
Tromikosoma panamense is a species of deep-sea leather sea urchin in the family Echinothuriidae and order Echinothurioida. Its thin test is flexible, a physical trait associated with the soft-bodied appearance of echinothuriid urchins, unlike the rigid tests of many shallow-water species. Records fr...
Why this score
Deep-sea echinothurioid with regional specialist interest, but limited broader recognition.
Scoring methodology
Phormosoma rigidum is a species of deep-sea sea urchin in the family Phormosomatidae, within the echinoid order Echinothurioida. It belongs to a group of irregular-looking echinoids associated with marine environments beyond ordinary shallow-water habitats. The species is distinguished taxonomically...
Why this score
Recognized Phormosoma species, deep-sea specialist appeal but moderate to low aggregate visibility.
Scoring methodology
Hygrosoma petersii is a species of echinothuriid sea urchin, a group often called leather urchins because the test is relatively flexible. Alexander Agassiz described the species in 1880, and biodiversity records associate it with deep Atlantic waters, including European seas at depths greater than...
Why this score
Deep-sea echinothuriid with limited public profile and mainly specialist taxonomic relevance.
Scoring methodology
Sperosoma obscurum is a marine sea urchin in the family Echinothuriidae and genus Sperosoma. Echinothuriids are distinguished by soft, flexible tests made from loosely sutured, overlapping plates, and most live in deep marine environments. The species was described by Agassiz and Clark in 1907, and...
Why this score
Obscure Sperosoma species, mainly taxonomic literature relevance and limited broader consensus.
Scoring methodology
Kamptosoma asterias is a living deep-sea sea urchin in the family Kamptosomatidae, within the echinothurioid branch of the sea urchins. The species is distinguished by prominent primary spines that are sharp and heavily structured, forming a conspicuous protective feature of its body. Its deep-water...
Why this score
Rare or obscure echinoid with mainly technical taxonomic significance and little public familiarity.
Scoring methodology
Hygrosoma hoplacantha is a deep-water sea urchin in the family Echinothuriidae, described by Wyville Thomson in 1877. Its test is thin, flexible, and non-rigid because the plates are separated by membranous tissue; preserved specimens are commonly dark purple or purplish brown, and the oral spines c...
Why this score
Obscure Hygrosoma species with low aggregate visibility outside deep-sea echinoid literature.
Scoring methodologyFrequently Asked Questions
What leads the Echinothurioid ranking?
Phormosoma placenta currently leads the Echinothurioid results with a displayed score of 7.25/10. This is an editorial ranking result for the items included on this page, not a universal verdict for every use case.
How should I read the score and confidence label?
The 0 to 10 score is Lunoo's ranking judgment. Strong confidence means 10 or more recorded comparison checks, some means 2 to 9, and provisional means fewer than 2.
What supports this ranking?
Lunoo combines category fit, feature coverage, pricing and value signals, public reception, recency, and peer comparisons. Public source links support factual item details when available, but they are not required for membership in this 12-item ranking.
Can I compare the leading results for Echinothurioid?
Yes. The comparison links put adjacent leaders side by side so you can inspect differences that one ranking score cannot capture.
