Dendrocephalus (Dendrocephalinus) lithacus ( Creaser, 1940 )

Rogers, D. Christopher, Dunn, Ann & Price, W. Wayne, 2019, A review of Dendrocephalus (Dendrocephalinus) (Crustacea: Anostraca) with the first records of male-male anostracan aggressive competition, European Journal of Taxonomy 509, pp. 1-14 : 5-6

Dendrocephalus (Dendrocephalinus) lithacus ( Creaser, 1940)

Fig. 1C , G–H

Chirocephalus lithacus Creaser, 1940: 435 , figs 1–6.

Chirocephalus lithacus – Dexter 1953: 761.

Branchinella lithaca – Belk & Sissom 1992: 314. — Belk & Brtek 1995: 325. — Brendonck 1997: 451 –454. — Brtek 1997: 22. — Brtek 2002: 54.

Dendrocephalus lithica – Rogers 2006: 7, 12.

Material examined

Holotype USA • ♂; Georgia, DeKalb County, Stone Mountain , within 100 yards of airway beacon; 9 Jun. 1939; USNM 79294 .

Allotype

USA • ♀; same data as for holotype; USNM 79295 .

Paratype

USA • ♀; same data as for holotype; USNM 79296 .

Remarks

This species is known from a set of rock outcrop pools on Stone Mountain in Georgia and has only been collected twice ( Dexter 1953). A petition was made to list D. lithacus as endangered under the United States Federal Endangered Species Act. However, after extensive survey efforts no evidence of extant populations of D. lithacus was found (Federal Register May 27, 1998) and the petition was denied ( Rogers 2006). Surveys made by the Georgia Department of Natural Resources at Stone Mountain and other granitic plutons in the area have so far yielded no new populations. This species is most likely extinct. The clam shrimp Eulimnadia graniticola Rogers et al., 2010 occurs in these pools.

Figures

Fig. 1. Dendrocephalus spec. A. Dendrocephalus acacioidea, male head, left side, anterior view. B. Dendrocephalus alachua, male head, left side, anterior view. C. Dendrocephalus lithacus, male head, left side, anterior view. D. Dendrocephalus acacioidea, brood pouch, right, lateral view. E. Dendrocephalus alachua, brood pouch, right, lateral view. F. Dendrocephalus lithacus, brood pouch, right, lateral view. G. Dendrocephalus lithacus, male, labrum, ventral view. H. Dendrocephalus lithacus, gonopods, right, lateral view. Scale bar: A–C = 1 mm; D–F, H = 4 mm; G = 0.25 mm.