Phalotris lemniscatus (DUMÉRIL, BIBRON & DUMÉRIL, 1854)
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Phalotris lemniscatus
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| Higher Taxa | Colubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes) |
| Subspecies | Phalotris lemniscatus lemniscatus DUMÉRIL, BIBRON & DUMÉRIL 1854 Phalotris lemniscatus iheringi (STRAUCH 1884) Phalotris lemniscatus trilineatus (BOULENGER 1889) |
| Common Names | E: Dumeril's Diadem Snake Portuguese: Cabeça-Preta, Cabeça-Preta-da-Areia, Cabeça-Preta-da-Praia, Cabeça-Preta-Meridional, Cabeça-Preta-Pampeana |
| Synonym | Elapomorphus lemniscatus lemniscatus DUMÉRIL, BIBRON & DUMÉRIL 1854: 840 Elapomorphus lemniscatus DUMÉRIL, BIBRON & DUMÉRIL 1854 Phalotris lemniscatus — COPE 1862 Elapomorphus lemniscatus — STRAUCH 1884: 567 Phalotris melanopleurus COPE 1885: 189 (part.) Elapomorphus lemniscatus — AMARAL 1929 (part.) Elapomorphus bilineatus lemniscatus — LEMA 1970 Elapomorphus bilineatus lemniscatus — LEMA 1979 Elapomorphus (Phalotris) lemniscatus lemniscatus — LEMA 1984 Elapomorphus (Phalotris) lemniscatus divittatus LEMA 1984 Elapomorphus lemniscatus lemniscatus — WILLIAMS & FRANCINI 1991 Elapomorphus (Phalotris) lemniscatus lemniscatus — CEI 1993 Phalotris lemniscatus divittatus — DE LEMA 1994 Phalotris divittatus — DE LEMA 2002 Phalotris lemniscatus — DE LEMA 2002 Phalotris lemniscatus — GRACA SALOMAO et al. 2003 Phalotris lemniscatus — JANSEN & KÖHLER 2008 Phalotris lemniscatus — WALLACH et al. 2014: 547 Phalotris lemniscatus iheringi (STRAUCH 1884) Elapomorphus iheringi STRAUCH 1884: 571 Phalotris melanopleurus COPE 1885 (part.) Elapomorphus lemniscatus — BOULENGER 1896 (part.) Elapomorphus bilineatus reticulatus — LEMA 1970 Elapomorphus (Phalotris) lemniscatus iheringi — LEMA 1984 Elapomorphus lemniscatus iheringi — WILLIAMS & FRANCINI 1991 Elapomorphus (Phalotris) lemniscatus iheringi — CEI 1993 Phalotris lemniscatus iheringi — DE LEMA 1994 Phalotris iheringi — DE LEMA 2002 Phalotris lemniscatus trilineatus (BOULENGER 1889) Elapomorphus trilineatus BOULENGER 1889: 265 Phalotris lemniscatus trilineatus Phalotris trilineatus — DE LEMA 2002 Phalotris trilineatus — DE LEMA 2011 |
| Distribution | Argentina (Corrientes, Entre Ríos) Type locality: South America. |
| Reproduction | oviparous |
| Types | Holotype: MNHN-RA 3668; BMNH 1946.1.2.90 is listed as type in the BMNH online catalog Syntypes: ANSP 11213-14; Brazil, Rio Grande do Sul; [melanopleurus] Holotype: BMNH 1946.1.2.90, collected by H. von Ihering [trilineatus] Holotype: MCN 3784 [divittatus] Holotype: ZISP ? [iheringi] Holotype: MNHN-RA (dry, dehydrated skin) [bilineatus] Holotype: MSNG 30651 (Museo Civico di Storia Naturale di Genova) [spegazzinii] Holotype: USNM 48939 [suspectus] |
| Diagnosis | Diagnosis: Phalotris lemniscatus can be distinguished from all congeners in the P. bilineatus group by a unique combination of the following characters: head dorsally black, with rostral and first supralabials lighter, and ventrally almost white (vs. head totally black in P. illustrator and P. spegazzinii); white nuchal collar present, 2–3 dorsal scales width, followed by a narrow black ring, one scale width (vs. nuchal collar absent in P. bilineatus, P. illustrator and P. spegazzinii); ventral scales almost black with the lateral and posterior edge white (vs. venter almost uniformly black in P. illustrator); flanks of the body with a black stripe on 3–5th dorsal rows, 1–2nd dorsal rows, white (vs. wider black lateral stripe 3–4 scales wide in P. illustrator, P. reticulatus and P. spegazzinii); cloacal black ring present (absent in P. multipunctatus); rostral well separated from the prefrontal (vs. rostral contacting the prefrontal or slightly separated in P. bilineatus). Additionally, P. lemniscatus have a well-defined vertebral stripe (vs. vertebral stripe absent or faded in other species, except P. illustrator, P. spegazzini and P. reticulatus). (Scrocchi et al. 2022). |
| Comment | Venomous! Synonymy partly after PETERS & OREJAS-MIRANDA 1970 and CEI 1993. Elapomorphus lemniscatus has been synonymized with E. bilineatus by PETERS & OREJAS-MIRANDA 1970. All subspecies of E. lemniscatus have been elevated to species status by DE LEMA who also considers them as members of Phalotris. Wallach et al. 2014 list Elapomorphus trilineatus as a synonym of Phalotris lemniscatus. Giraudo & Scrocchi 2002 list Phalotris lemniscatus divittatus as synonym of Phalotris reticulatus, without further comment; Carreira 2005 and Wallach et al. 2014 list it as synonym of P. lemniscatus. Elapomorphus spegazzinii and other species have been considered subspecies or synonyms of Phalotris (Elapomorphus) bilineatus (see e.g. PETERS & OREJAS-MIRANDA 1970). De LEMA (1979) synonymizes Elapomorphus bilineatus with E. lemniscatus. CARREIRA et al. (2005) also list Phalotris bilineatus as synonym of Phalotris lemniscatus. Elapomorphus reticulatus PETERS 1860: 518 has been removed from the synonymy of E. bilineatus (by FERRAREZZI 1993). “Phalotris bilineatus" is a name based on a hybrid specimen between Phalotris suspectus x Phalotris spegazzinii (de Lema, 1984). GIRAUDO & SCROCCHI 2002 and more recently WALLACH et al. 2014: 535 list this species (incl. suspectus) as synonym of Ph. bilineatus. LEMA 2002 considered them as valid. COSTA & BERNILS 2015 consider bilineatus as a synonym of P. lemniscatus (following Lema 1979), hence Nogueira et al. 2019 do not list it in their Atlas either. Distribution: See map in Scorcchi et al. 2002: 51 (Fig. 3). Reports from Paraguay (e.g. fide Paul Smith, pers. comm., 27 Apr 2014) represent other species now resurrected from P. lemniscatus. Probably in Uruguay and S Brazil as the species occurs near the borders in Argentina. Subspecies: the status of Phalotris lemniscatus iheringi (STRAUCH 1884) remains questionable (C. Nogueira, pers. comm. 30 Sep 2016). NCBI taxID: 1260395 [bilineatus] |
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