PBDB Taxon

Basic info	Taxonomic history	Classification	Included Taxa
Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Leptaena (Leptaena) rhomboidalis

Strophomenata - Strophomenida - Rafinesquinidae

Taxonomy

Anomites rhomboidalis was named by Wahlenberg (1818) [Neotype selected by Kelly (1967: 594, pl. 98 fig. 1) This species originally was described by Wilckens but in a pre-Linnean work. So, it often is attributed to Wilckens rather than Wahlenberg.]. Its type specimen is BU 878 and is a 3D body fossil.

It was recombined as Conchita rhomboidalis by Wilckens (1769); it was recombined as Leptaena (Leptaena) rhomboidalis by Rubel (2011); it was recombined as Leptaena rhomboidalis by Girty (1899), Reed (1952), Kelly (1967), Bassett and Cocks (1974), Hoel (2005) and Hoel (2014).

Sister species lacking formal opinion data

L. dicax

Synonymy list

Year	Name and author
1769	Conchita rhomboidalis Wilckens p. 77 figs. pl. 8 f. 43-44
1818	Anomites rhomboidalis Wahlenberg p. 65 figs. pl. 8 f. 43-44
1821	Anomites rhomboidalis Wahlenberg p. 65 figs. pl. 8 f. 43-44
1899	Leptaena rhomboidalis Girty p. 525
1952	Leptaena rhomboidalis Reed
1967	Leptaena rhomboidalis Kelly p. 594 figs. pl. 98 figs. 1-3
1974	Leptaena rhomboidalis Bassett and Cocks p. 14 figs. pl. 2 figs. 7-8
2003	Leptaena rhomboidales May
2005	Leptaena rhomboidalis Hoel pp. 265 - 268 figs. 2, 10, 11A
2011	Leptaena (Leptaena) rhomboidalis Rubel
2014	Leptaena rhomboidalis Hoel figs. 1b,h,l,m; 3b-d; 4a-d; 8a,i

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Protostomia
—	Spiralia
superphylum	Lophotrochozoa
—	Lophophorata
—	Panbrachiopoda	Carlson and Cohen 2020
phylum	Brachiopoda	Cuvier 1805

Rank	Name	Author
subphylum	Rhynchonelliformea	Williams et al. 1996
class	Strophomenata	Williams et al 1996
order	Strophomenida	Opik 1934
superfamily	Strophomenoidea	King 1846
family	Rafinesquinidae	Schuchert 1893
subfamily	Leptaeninae	Hall and Clarke 1894
genus	Leptaena	Dalman 1828
subgenus	Leptaena	Dalman 1828
species	rhomboidalis	(Wahlenberg 1818)

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

†Leptaena (Leptaena) rhomboidalis Wahlenberg 1818

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Diagnosis

Reference	Diagnosis
F. B. Kelly 1967	Semi-oval to rhomboid, with fine radial costellae and very deeply incised rugae. Foramen large, truncating the pseudodeltidium which covers the entire delthyrium. Ventral muscle scar sub-pentagonal; adductors poorly defined, not enclosed by adductors.
O. A. Hoel 2005	Species of Leptaena with very high and steep rugae separated by deep interspaces. Large foramen. Adductor scars in the ventral valve broad. Cardinal process lobes divergent.

Measurements

No measurements are available

Composition:

low Mg calcitep

Entire body:

yesg

Adult length:

10 to < 100g

Adult width:

10 to < 100g

Adult height:

1.0 to < 10g

Folds:

noneg

Ribbing:

minorg

Spines:

noneg

Internal reinforcement:

noneg

Environment:

marineuc

Locomotion:

stationaryg

Attached:

yesp

Life habit:

epifaunalg

Diet:

suspension feederg

Vision:

blindc

Created:

2009-04-13 09:55:02

Modified:

2018-11-11 09:56:39

Source: g = genus, c = class, p = phylum, uc = unranked clade

References: Nesnidal et al. 2013, Hendy et al. 2009, Aberhan et al. 2004

Age range: base of the Jaani to the top of the Jaagarahu or 433.60000 to 422.90000 Ma

Collections (4 total)

Time interval	Ma	Country or state	Original ID and collection number
Jaani	433.6 - 431.3	Estonia (Saare)	Leptaena rhomboidalis (193604)
Jaagarahu	428.2 - 422.9	Estonia (Saare)	Leptaena rhomboidalis (175058)
Jaagarahu	428.2 - 422.9	Estonia (Pärnu)	Leptaena rhomboidalis (193605)
Kaugetuma	423.0 - 421.5	Estonia	Leptaena rhomboidalis (193120)