Galene dashtbani, Khosravi & Sari & Mirziee-Ataabadi & Gholamalian & Hyžný, 2022
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publication ID |
https://doi.org/ 10.11646/zootaxa.5124.2.2 |
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publication LSID |
lsid:zoobank.org:pub:78F24E28-48AB-4D69-B4D7-D1AA92731606 |
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DOI |
https://doi.org/10.5281/zenodo.6404976 |
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persistent identifier |
https://treatment.plazi.org/id/03A387C5-FFD4-FFDD-FF1B-FAD8FE0FFB9C |
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treatment provided by |
Plazi |
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scientific name |
Galene dashtbani |
| status |
sp. nov. |
Galene dashtbani n. sp.
( Figs. 5 View FIGURE 5 , 6 View FIGURE 6 )
Type material. Holotype: ZUTC6881 , a carapace from the Honguyeh section, from the Middle Miocene (Langhian), Guri member of the Mishan Formation . Paratypes: HUIM195 , HUIM198-202 , carapaces from the Gohreh section, from the Middle Miocene (Langhian), Guri member of the Mishan Formation. Measurements of the carapace length and width are provided for each specimen in Table 1 View TABLE 1 .
Additional material. Non-types: HUIM 196-197, carapaces from the Gohreh section, the Middle Miocene (Langhian) of the Guri Member of the Mishan Formation. HUIM 203-205, chelipeds (one with fragmentary carapace), from the Gohreh section, the Middle Miocene (Langhian) of the Guri Member of the Mishan Formation.
Diagnosis. Carapace with smooth dorsal surface, no posterolateral spines, frontal and orbital lobes with swollen tuberosities, with no spines.
Description. Carapace subhexagonal, anterior margins more ovate; posterior margins with well-defined 45° angle between posterolateral and posterior margins; two anterolateral blunt teeth on epibranchial margins of carapace; not very sharp, but clearly distinguished ( Figs. 5E, F View FIGURE 5 ), no posterolateral tuberosities ( Figs. 5A, C, E–I, K View FIGURE 5 , 6A, D–F View FIGURE 6 ); frontal margin bilobed. Dorsal surface of carapace smooth, longitudinally slightly convex; cardiac and mesogasteric regions defined with prominent fissures; lateral borders of anterior mesogastric region sub-parallel, extending close to the frontal lobe with narrow furrow ( Figs. 5A–D, I–K View FIGURE 5 ); other regions of carapace not markedly prominent. Thoracic sternum and male pleon narrow (HUIM199, HUIM202, Figs. 6C, G View FIGURE 6 ). Surface of cheliped manus smooth; palm with posterior tuberculated margin ( Fig. 6I View FIGURE 6 ); dactylus shorter than pollex ( Fig. 6H View FIGURE 6 ).
Occurrence. The species is known from the Middle Miocene (Langhian) of the Guri Member of the Mishan Formation exposed at Honguyeh and Gohreh sections, Hormozgan Province, southern Iran.
Etymology. This species is named in honor of Mr.Houshang Dashtban; a veteran paleontologist, who contributed deeply into the exploration and the study of Iranian fossils including crabs.
Remarks. Galene dashtbani sp. nov. is different from its congeners by having a combination of mixed characteristics. In having less prominent lateral spines, no posterolateral spines and a less protuberant cardiac region ( Figs. 5A, C, H, L View FIGURE 5 ), Galene dashtbani sp. nov. is different from Galene bispinosa , including specimens previously documented as Gecarcinus trispinosus and Podopilumnus fittoni (also see Etheridge & McCulloch 1916: pl. III fig. 3; Valinassab et al. 2012: fig. 2a; Ng et al. 2017: fig. 5h), Galene stipata Morris & Collins, 1991 (see Morris & Collins 1991: 8, fig. 54a), Galene obscura A. Milne-Edwards, 1865 (see Collins et al. 2003: fig. 6a) and Galene litoralis Collins, Lee & Noad, 2003 (see Collins et al. 2003: 221, fig. 7a). The carapace frontal margin of G. dashtbani sp. nov. comprises half the orbitofrontal margin, compared to less than half in Galene granulifera Lin, 1947 (compare Hu & Tao 2004 L pl. V figs. 4,7) and G. obscura (see Collins et al. 2003: figs. 6a, 6c). Galene dashtbani sp. nov. has a smoother carapace surface, both in smaller and larger specimens ( Figs. 5A, C, I, K View FIGURE 5 ), in contrast to G. bispinosa , which bears a more granular carapace in smaller specimens ( Ng et al. 2001: 31).
The most prominent character of Galene dashtbani sp. nov. is the spineless and globular form of the frontal margin and superior margin of the orbit, at the same time, bearing swollen tuberosities on these regions ( Figs. 5B, D, E View FIGURE 5 ). Despite the size, this feature is prominent in all studied specimens with a well-preserved frontal margin. Even in the smallest specimen (HUIM195, Figs. 5C–F View FIGURE 5 ), the globular form of frontal and orbital lobes is prominent.
Two small specimens (HUIM196, HUIM197) of Galene dashtbani sp. nov. appear to have a proportionally wider carapace ( Figs. 5I, K View FIGURE 5 ). These specimens have less salient frontal and orbital margins and appear morphologically different from the others. These possess a flatter carapace, and deeper grooves between the mesogastric, cardiac and branchial lobes ( Figs. 5I–K View FIGURE 5 ). In these specimens, the widest part of the mesogastric region is at the level between two lateral tuberosities of the carapace. The width of the posterior margin of the intestinal region equals the width of the front ( Fig. 5I, K View FIGURE 5 ).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.