Laticallichirus grandis (Karasawa & Goda, 1996)

(Figs. 6 A–J)

Callianassa sp. type B.—Tokai Fossil Society (Ed.) 1977: 60, pl. 27, fig. 6. Callianassa sp.— Kato & Koizumi 1992: 49, fig. 3-3. Calliax sp.— Karasawa & Tanaka 1994: 12, figs. 2-1–12. Neocallichirus sp.— Karasawa et al. 1995: 128, fig. 2. “ Neocallichirus ” grandis Karasawa & Goda, 1996: 1, fig. 1.— Karasawa 1997: 33, pl. 5, figs. 1–4. Neocallichirus grandis .— Kato & Karasawa 1998: 5, pl. 2, figs. 7–16. — Kato 2001: 40.— Schweitzer et al. 2006: 115. Grynaminna grandis .— Obata & Hayashi 2001: 46, figs. 3.1–12.— Kato 2003: 159. — Hyžný & Karasawa 2012: 65, fig. 1A–

H.— Karasawa et al. 2014: 59, fig. 5.1–5.3.— Hyžný & Klompmaker 2015: fig. 7A, 412 (Table 1).— Ando et al. 2016: 18,

figs. 3.3–10.— Ando & Kawano 2017: 85, fig. 2.9–2.20.

Podocallichirus grandis .— Karasawa et al. 2006: 127, pl. 2, figs. 1–6.— Kobayashi et al. 2008: 111.— Schweitzer et al. 2010: 39.

Laticallichirus grandis .— Komai et al. 2019: 466–477, figs. 1–6.— Mimoto 2020: 51, fig. 3.

Material examined. MFM 145597– MFM 145606 and over 600 other referred specimens.

Remarks. The present species has been described from the Lower Pleistocene to Recent in the Kyushu to Kanto district, Japan (e.g., Karasawa & Goda 1996; Kato & Karasawa 1998; Ando & Kawano 2017; Komai et al. 2019). Komai et al. (2019) collected the specimens of extant Laticallichirus grandis from the muddy-sand mixed with gravel bottom of subtidal zone, and Ando & Kawano (2017) showed that the species was living under the coarsegrained sandy and gravelly bottoms mixed with shells of the upper sublittoral zone. The preservation of the present specimens is similar to other described specimens that seemed to be living near the sedimentary area (Ando et al. 2016; Ando & Kawano 2017). Therefore, the present specimens were not, in all likelihood, transported from other localities and shallower environment, and the present record suggests that the species has been living under coarsegrained sandy and gravelly bottoms mixed with shells of the lower sublittoral to subtidal zones.