The Echinoid Directory

Lamprechinus Doderlein, 1905, p. 622

Diagnostic Features
  • Test small and depressed, ambitus a little below mid-height.
  • Apical disc relatively large; dicyclic with ocular plates widely exsert. Genital plates smooth except for a single perianal tubercle. Periproct with just a few large plates.
  • Ambulacrarelatively wide; trigeminate with pore-pairs arranged uniserially; not expanded adorally. Each triad with a primary tubercle, adjacent to the pore zone and a smaller secondary tubercle immediately adjacent. Perradial zone rather naked with just sparse miliaries.
  • Interambulacral plates with a single central primary tubercle surrounded by much smaller secondaries.
  • Primary tubercles imperforate and non-crenulate.
  • No pitting of sutures but primary tubercle areole distinctly incised and surrounding secondaries very prominent giving a scuplted appearance.
  • Peristome with almost no buccal notches; naked except for the 10 buccal plates.
  • Spines small and simple.
  • Lantern camarodont.
Distribution
Recent, South Africa, Japan and Hawaii.
Name gender masculine
Type
Lamprechinus nitidus Doderlein, 1905, p. 662 by original designation.
Species Included
  • L. nitidus Doderlein, 1905; Recent, Pacific.
  • L. sculptus Mortensen 1942; Recent, Japan, Hawaii.
Classification and/or Status

Euechinoidea, Camarodonta, Temnopleuroida, Trigonocidaridae.

Subjective junior synonym of Trigonocidaris Agassiz, 1869.

Remarks

As Mortensen (1943) noted, there is very little to distinguish this taxon from Trigonocidaris and Orechinus, other than details of degree of sculpting and the extent to which plates are developed on the peristomial membrane. The three are synonymized here.

Döderlein, L. 1905. 4. Über Seeigel der deutschen Tiefsee-Expedition. Zool. Anz. 28 (18), 621-624.

Doderlein, L. 1906. Die Echinoiden der deutschen Tiefsee-Expedition. Wissenschaftliche Ergebnisse der Deutsche Tiefsee Expedition 1898-99 5, 63-350.

Mortensen, T. 1943. A monograph of the Echinoidea Part III.2, Camarodonta 1. C. A. Reitzel, Copenhagen.