Lepidochitona beanii (Carpenter, 1857)

Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen & Ríos-Jara, Eduardo, 2023, Inventory of chiton species (Polyplacophora) from the rocky intertidal of the Northern Gulf of California, with an illustrated taxonomic key, Zootaxa 5296 (2), pp. 147-178 : 162-164

publication ID

https://doi.org/ 10.11646/zootaxa.5296.2.2

publication LSID

lsid:zoobank.org:pub:624273A6-3028-42C2-ABE2-A18BBF828156

DOI

https://doi.org/10.5281/zenodo.7973139

persistent identifier

https://treatment.plazi.org/id/795287BF-E458-5505-D0F1-707A71A0FD62

treatment provided by

Plazi

scientific name

Lepidochitona beanii (Carpenter, 1857)
status

 

Lepidochitona beanii (Carpenter, 1857)

( Figures 3B View FIGURE 3 , 8I–O View FIGURE 8 )

Lepidopleurus beanii Carpenter, 1857: 209–229 . Chresonymy and synonymy in Ferreira (1982).

Type material. Lectotype, designated by Keen (1968), Carpenter´s Mazatlán collection, LACM tablet 905.

Type locality. Mazatlán , Sinaloa, México .

Material examined. Ten specimens, BL 4.7–8.5 mm.

Habitat. In the upper intertidal on medium–sized and small rocks, buried in sand.

Remarks. Lepidochitona beanii has a microgranular sculpture in all valves ( Figs. 8I–M View FIGURE 8 ), lateral areas delimited by a shallow depression ( Fig. 8L View FIGURE 8 ). Girdle densely covered by tiny spicules and tufts of hyaline curved spicules, bunched in groups of 3–5 located near the sutural areas of the valves ( Figs. 8I–J View FIGURE 8 ). Radula with tricuspid major lateral tooth, minor lateral tooth long and narrow, shorter than the central tooth, which is a sub–rectangular, long plate ( Figs. 8N–O View FIGURE 8 ).

Ferreira (1982) recorded specimens from Baja California (he did not specify the exact locality) with a maximum size of 11.7 mm, and with varied tegmentum colors (pink, cream, and light "salmon" color). Ferreira (1982) reported that hyaline girdle spicules are lacking in small individuals (BL 4.5 mm) and concluded that these structures develop in the last phase of the juvenile stage (this cannot be confirmed herein, see below). Kaas & Van Belle (1985a) reported that L. beanii has been collected from the intertidal to up to 230 m depth, showing a continuous distribution from southern California to Perú, including the Gulf of California. García-Ríos & Álvarez-Ruiz (2007) reported L. beanii from La Paz, Baja California Sur (BCS). There are no recent reports from the type locality, Mazatlán, Sinaloa.

We found that hyaline spicules are present even in small specimens collected at Bahía Kino (BL 3.6 mm, see Fig. 8I View FIGURE 8 ) and La Paz (BL 3.1 mm, see Fig. 8J View FIGURE 8 ). Smaller specimens also showed hyaline spicules, while larger ones showed evidence of many broken spicules. Therefore, Ferreira's (1982) hypothesis regarding the late ontogenetic development of the spicules could not be confirmed.

LACM

Natural History Museum of Los Angeles County

Kingdom

Animalia

Phylum

Mollusca

Class

Polyplacophora

Order

Chitonida

Family

Lepidochitonidae

Genus

Lepidochitona

Loc

Lepidochitona beanii (Carpenter, 1857)

Reyes-Gómez, Adriana, Vargas-Ponce, Ofelia, Galván-Villa, Cristian, Salgado-Barragán, José, Esqueda-González, Ma. Del Carmen & Ríos-Jara, Eduardo 2023
2023
Loc

Lepidopleurus beanii

Carpenter 1857: 209 - 229
1857
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