Ischnochiton tridentatus Pilsbry, 1893

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 : 153

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.7973067

persistent identifier

https://treatment.plazi.org/id/795287BF-E451-5512-D0F1-76D27703FCF7

treatment provided by

Plazi

scientific name

Ischnochiton tridentatus Pilsbry, 1893
status

 

Ischnochiton tridentatus Pilsbry, 1893 View in CoL View at ENA

( Figure 2B View FIGURE 2 )

Ischnochiton (Radsiella) tridentatus Pilsbry, 1893: 35–39 View in CoL . Chresonymy and synonymy in Kaas & Van Belle (1990).

Type material. Lectotype, designated by Kaas & Van Belle (1990), ANSP 66324 About ANSP .

Type locality. La Paz, Baja California Sur, México ( Kaas &Van Belle 1990) .

Material examined. Seventy– six specimens, BL 7.3–20.2 mm.

Habitat. In the superficial intertidal on medium–sized and small rocks buried in sand. Specimens were collected from numerous loose rocks with dense patches of globular thalli (maximal diameter of 20 cm) of the alga Dictyosphaeria Decaisne, 1842 .

Remarks. Ischnochiton tridentatus has a sculpture of concentric zigzag lines and variable tegmentum color of light olive, dark green and gray ( Fig. 2B View FIGURE 2 ).

Kaas & Van Belle (1990) reported the distribution of this species throughout the Gulf of California, including Mazatlán. However, recent studies have shown that I. tridentatus is absent in Mazatlán, while it is abundant at La Paz, Baja California Sur (García-Ríos & Álvarez-Ruiz 2007). In the present study, it was only registered at Bahía San Carlos, Sonora. The maximal size measured is 26.1 mm, coinciding with previous reports by Kaas & Van Belle (1990).

Ischnochiton tridentatus is endemic to the Gulf of California. In our surveys, it was common to find small (maybe juveniles) and adult specimens cohabiting at beaches with low wave energy.

Kingdom

Animalia

Phylum

Mollusca

Class

Polyplacophora

Order

Chitonida

Family

Ischnochitonidae

Genus

Ischnochiton

Loc

Ischnochiton tridentatus Pilsbry, 1893

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

Ischnochiton (Radsiella) tridentatus

Pilsbry 1893: 35 - 39
1893
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