Mathilda malvinarum ( Melvill & Standen, 1907 )

Luca, Javier Di & Zelaya, Diego G., 2019, Gastropods from the Burdwood Bank (southwestern Atlantic): an overview of species diversity, Zootaxa 4544 (1), pp. 41-78 : 63

publication ID

https://doi.org/ 10.11646/zootaxa.4544.1.2

publication LSID

lsid:zoobank.org:pub:211842AA-6C98-425B-9377-1AF0DC78C893

DOI

https://doi.org/10.5281/zenodo.5934699

persistent identifier

https://treatment.plazi.org/id/03DA87AC-FFFD-FFA0-FF46-FD5AFDBA2D98

treatment provided by

Plazi

scientific name

Mathilda malvinarum ( Melvill & Standen, 1907 )
status

 

Mathilda malvinarum ( Melvill & Standen, 1907) View in CoL

Fig. 5D View FIGURE 5

Cerithiopsis malvinarum Melvill & Standen, 1907: 135 , figs. 6, 6a; Strebel, 1908: 49, pl. 1, figs. 10a–c

Mathilda malvinarum View in CoL — Powell, 1951: 113

Examined material. 10 sh. (MACN-In 40700).

Description. Shell height to 2.8 mm (up to 4 mm according to Melvill & Standen 1907); turritelliform, moderately solid. Protoconch large, of 1 markedly convex whorl; sculptured with 4 low, wide spiral cords. Teleoconch of up to 5.75 whorls, markedly convex in outline; last whorl comprising about 45% of total shell height. Suture impressed. Surface pale brownish, clearer at spiral sculpture; sculptured with 25 to 30 axial ribs per whorl and 4 spiral cords, the 2 adapical being stronger. Base delimited by a strong cord and sculptured with up to 9 additional, narrower cords. Aperture almost rounded, somewhat projected anteriorly, interior brownish with lighter margin; columellar callus narrow, slightly reflected.

Remarks. The original figure by Melvill & Standen (1907) only shows 2 spiral cords per whorl. However, Strebel (1908), who studied the same specimens, figured four spiral cords per whorl, a condition similar to that found in the material here examined.

Kingdom

Animalia

Phylum

Mollusca

Class

Gastropoda

Order

Heterostropha

Family

Mathildidae

Genus

Mathilda

Loc

Mathilda malvinarum ( Melvill & Standen, 1907 )

Luca, Javier Di & Zelaya, Diego G. 2019
2019
Loc

Mathilda malvinarum

Powell, A. W. B. 1951: 113
1951
Loc

Cerithiopsis malvinarum

Strebel, H. 1908: 49
Melvill, J. C. & Standen, R. 1907: 135
1907
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