A new name for Achistrum brevis Mostler, 1971 (Holothuroidea) [non Achistrum brevis Gutschick, 1959 (Holothuroidea)]

Abstract. The holothurian paraspecies Achistrum brevis Mostler, 1971 from the Norian of Hernstein (Lower Austria), is a junior homonym of Achistrum brevis Gutschick, 1959. A. brevis Gutschick, 1959 is a significant element in the Lower Mississippian of northern Indiana, USA (Gutschick, 1959, 132). In consideration of this homonymy, it is proposed that Achistrum brevis Mostler, 1971, is changed and designated as Achistrum hagdorni Mostler & Reich nom. nov.

SYSTEMATIC DESCRIPTION

Class Holothuroidea Blainville, 1834

Order Apodida Brandt, 1835

Parafamily Achistridae Frizzell & Exline, 1956

Paragenus Achistrum Etheridge, 1881 emend. Frizzell & Exline, 1956

Achistrum hagdorni nom. nov.

(Fig. 1)

*1971 Achistrum brevis Mostler: 9, pl.2, fig. 6 [non Achistrum brevis Gutschick, 1959: 132–133, fig. 2, pl.25, figs 20–24 – Lower Mississippian, northern Indiana, USA].

1973 Achistrum cf. brevis Mostler; Mostler & Parwin: 20.

1978 Achistrum brevis; Mostler: 14.

1992 A. brevis Mostler; Gilliland: 83.

Derivation of name. In honour of Dr Hans Hagdorn (Ingelfingen, Germany).

Diagnosis. See Mostler (1971, p. 9).

Types. Holotype, University of Innsbruck; see Mostler (1971, pl.2, fig. 6).

Type locality and horizon. Hernstein (Lower Austria). Norian.

Description. See Mostler (1971, p. 9).

Remarks. See Mostler (1971, p. 9).