Meet #Coproica testudinea, a newly described species of Lesser Dung Fly (family #Sphaeroceridae). What makes this species particularly interesting is that is has only been found inside the burrows of Gopher Tortoises (#Gopherus polyphemus), and nowhere else! Gopher tortoises are listed as #vulnerable by the #IUCN, and so it’s likely this fly is at least as at risk as it’s reptilian host.

This new species was just described last week by my friend and former labmate Matthew Bergeron in the journal #Zootaxa. (at University of Guelph Insect Collection)
The desert tortoise trichotomy: Mexico hosts a third, new sister-species of tortoise in the Gopherus morafkai–G. agassizii group
Desert tortoises (Testudines; Testudinidae; Gopherus agassizii group) have an extensive distribution throughout the Mojave, Colorado, and Sonoran desert regions. Not surprisingly, they exhibit a tremendous amount of ecological, behavioral, morphological and genetic variation. Gopherus agassizii was considered a single species for almost 150 years but recently the species was split into the nominate form and Morafka’s desert tortoise, G. morafkai, the latter occurring south and east of the Colorado River. Whereas a large body of literature focuses on tortoises in the United States, a dearth of investigations exists for Mexican animals. Notwithstanding, Mexican populations of desert tortoises in the southern part of the range of G. morafkai are distinct, particularly where the tortoises occur in tropical thornscrub and tropical deciduous forest. Recent studies have shed light on the ecology, morphology and genetics of these southern ‘desert’ tortoises. All evidence warrants recognition of this clade as a distinctive taxon and herein we describe it as Gopherus evgoodei sp. n. The description of the new species significantly reduces and limits the distribution of G. morafkai to desertscrub habitat only. By contrast, G. evgoodei sp. n. occurs in thornscrub and tropical deciduous forests only and this leaves it with the smallest range of the three sister species. We present conservation implications for the newly described Gopherus evgoodei, which already faces impending threats.
By Taylor Edwards, Alice Karl, Mercy Vaughn, Philip Rosen, Christina Meléndez Torres, Robert Murphy

Desert Tortoise (Gopherus agassizii) with scute anomaly

Congenital scute anomalies are fairly common in desert tortoises, but incidence may vary significantly by locality. Factors influencing the development of scute anomalies may be environmental (temperature, moisture levels, oxygen content, presence of chemical pollutants/radiation at the nest site), genetic, or both (see Grover and DeFalco 1995 for summary).

©Zachary A. Cava