Hentzia palmarum (Hentz 1831)

David B. Richman, 2010, A new species and new records of Hentzia (Araneae: Salticidae: Dendryphantinae) from the United States, The Journal of Arachnology 38, pp. 73-78: 76-77

publication ID

 

persistent identifier

http://treatment.plazi.org/id/038D87C1-FFF5-EF6D-FC40-3A02FBB9BCD9

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Jeremy

scientific name

Hentzia palmarum (Hentz 1831)
status

 

Hentzia palmarum (Hentz 1831) 

Figs. 11–15

In the process of comparing this species to specimens of Hentzia alamosa  new species from Big Bend Ranch State Park, Presidio County, Texas, several new records were discovered. For a description of this species see Richman (1989, pp. 296– 302, figs. 16–27).

New Records. — USA: Texas: 1 male, 4 females, Edwards County, near Rock Springs (30°0 1ʹ29ʺN, 100°12ʹ21ʺW), January 1994GoogleMaps  ; 3 females, Mason County, near Mason (ca 30°44ʹ56ʺN, 99°13ʹ50ʺW), January 1994GoogleMaps  ; 1 male, 5 females, Zavala County, near Nueces (ca 28°47ʹ18ʺN, 99°49ʹ0 9ʺW), January 1994. All specimens were taken from irrigation tubes in pecan orchards by J. W. Stewart. All specimens deposited in TAMUIC  .

Discussion. —The scattered distribution of most Hentzia  species in the western United States and Mexico, usually in riparian areas, suggests speciation events by the founder effect, with a few individuals being accidentally introduced (perhaps by storms) to isolated favorable habitats. The other possibility may be isolation of populations of more widely spread species (such as H. palmarum  or H. fimbriata  ) in refugia because of desert expansion, followed by subsequent speciation events. The presence of Hentzia fimbriata  in Sycamore Canyon is an exception to the isolated populations in other parts of the southwesten USA and northwestern Mexico, as this species is widespread in Mexico. It is likely that its distribution follows the Sierra Madre and the watersheds of Mexican rivers draining into the Gulf of California. Sycamore Canyon, which drains into the Rio Altar in the Rio de la Concepcion drainage in Sonora, and where the U.S. specimens of H. fimbriata  have been collected, is unusual in the variety of jumping spiders found there that are primarily associated with other geographical ranges. These include Zygoballus rufipes Peckham & Peckham 1885  (Mexico and eastern United States), Phidippus tux Pinter 1970  (central Mexico), and Sarinda hentzi (Peckham & Peckham 1892)  (eastern United States) (all collected by the author). Because of the similar morphological features, future research on the genus Hentzia  should include mitochondrial DNA analysis of as many species as possible in order to clear up the actual phylogenetic source and relationships of these species, especially in the palmarum  species group. This is unfortunately beyond the scope of this paper and would require collection of fresh material from Cuba and Mexico, as well as the USA, even if limited to the palmarum  group.

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Salticidae

Genus

Hentzia