Conus
(Hemiconus) pissarroi (Tracey & Craig, 2017)
Diagnosis of H. pissarroi n.
sp. : Small Hemiconus with relatively long,
rather smooth body whorl, granulated cords on the spire and a single row of sharp
tubercles above the suture, emerging as a double row on the last whorl (1).
Description of H. pissarroi n.
sp. : Shell small, biconical, spire 30% of shell
height ; specimens examined eroded but protoconch small, paucispiral of less than
2 whorls ; spire profile slightly concave, sutures somewhat canaliculate, spire
whorls flat-sided, ornamented with a prominent beaded subsutural cord followed
by 3 finely beaded cords on the ramp and a row of pointed tubercles resting on
the lower suture until the last whorl where a lower row of tubercles emerges to
form a narrow but pronounced double row around the periphery ; body whorl
straight-sided with numerous close, faint spiral striae, coarser and stronger on
the base; aperture parallel-sided, paries with a shallow depression at the top
and a marked discontinuity where it meets the short columella basally; anal sinus
shallow, lip gently curved. Up to 12.7 x 5.3 mm (1).
Discussion of Hemiconus pissarroi nov. sp. : Despite a
certain resemblance to some members of the H. peraratus complex, this
species is always easily separated by eye, which is perhaps why COSSMANN & PISSARRO (1901) considered it to
belong to a separate genus, Conus (Conospira). However, it is
surprising that they confused this species with Conus lebruni, described
and figured by DESHAYES (1865) and (correctly) by
themselves (COSSMANN & PISSARRO, 1913), which is a squat species with prominent square tubercles, and
is unlikely to be a Hemiconus. H. pissarroi n. sp. most resembles H.
peraratus Cossmann, 1897 from which it is distinguished by its prominent, bisected
tubercles on the shoulder, its more elongate body whorl and finer, weaker and
more numerous spiral threads (1).
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Hemiconus
pissarroi (Tracey & Craig) n.
sp. as Conilithes lebruni after COSSMANN
& PISSARRO (1901) pl. 7, fig. 24, Fresville |
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Figs. 76-79. Hemiconus pissarroi (Tracey & Craig),
n. sp. 76. Holotype NHMUK PI TG 26906 (leg. S. TRACEY) Fresville 77. Paratype NHMUK PI G 15493(1) (coll. PISSARRO as Conus lebruni) Fresville 78. Paratype NHMUK PI TG 26907 (leg. B. CRAIG) Néhou 79. Paratype NHMUK PI TG 26908 (leg. B. CRAIG) Néhou |
Bibliografia Consultata