Dolicholatirus etherius, Simone, 2024

Genus Dolicholatirus Bellardi, 1884 View in CoL Dolicholatirus etherius new species

( Fig. 31 View Figure 31 ) https://zoobank.org/ C4B4E290-3D10-4CBA-9BF4-3CBEFCFED9E8

Type: Holotype MNHN-IM-2000-39807, shell.

Type locality: BRAZIL. Espírito Santo ; ItaÚnas, off, continental slope, 18°59′S 37°50′W, 295 m [ MD55 sta. DC75 , RV Marion Dufresne col., v.1987] GoogleMaps .

Diagnosis: Shell lacking pigment and apertural plicae. Sculpture with 3 large spiral cords, with interspaces with 5-6 smaller spiral cords; rounded axial threads forming 3 equidistant saliences.

Description: Shell about 18 mm. Very elongated, ~3 times longer than wide; spire~56% of total length, last whorl ~61% of total length. Spire angle ~28°. Spire up to 10 convex whorls; suture well-marked, with angle ~140°. Transverse section circular ( Fig. 31G, H View Figure 31 ). Protoconch not preserved (eroded). Sculpture 10 low spiral cords ( Fig. 31B, C, E View Figure 31 ), of rounded profile, located close to each other; one each 5-6 larger,~3 times broader than remaining; additionally possessing strong, wide, rounded axial threads (10 in penultimate whorl); axial cords becoming particularly larger on these axial threads, making 3 equidistant transverse saliences, superior salience relatively distant from superior suture, inferior salience very close to inferior suture ( Fig. 31 View Figure 31 A-E). Last whorl with ~25 spiral cords and 11 axial threads similar to those of preceding whorls; same spiral sculpture along siphon, as oblique cords ( Fig. 31B, E View Figure 31 ). Aperture elliptic, ~twice longer than wide ( Fig. 31A, D View Figure 31 ); no anal notch detectable. Canal relatively conic, with 20% of shell length, and ~42% of last whorl width in its base ( Fig. 31F, H View Figure 31 ). Outer lip (broken) simply arched; inner lip weakly concave, callus narrow, thin, not exceeding apertural limit, no plicae. Umbilicus absent ( Fig. 31H View Figure 31 ). Columella wide, straight; each whorl with shallow inferior groove ( Fig. 31F View Figure 31 ).

Etymology: The specific epithet is derived from the Latin aetherius, meaning ethereal, in the sense of delicate, immaterial, in allusion to the elegant sculpture of the shell.

Distribution: Only know from type locality.